koc-mp-027 part 2

7/25/2019 KOC-MP-027 part 2

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of64

REV. {

OC.

NO. KOC-lrJlP{17

pART

2

{$.1.d)

{*,. Jþ-(Jl

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KUUIJAIT

OIL

CüMPANY

{K.$ t.}

STANDARDS

PUBL¡CATION

KOç

RECOMIVIENDED

PRATTICE

FOR

PRESSURE RELIEF DEVISES:

SIZING,

SELECTION,

TWINNING AND

INSTALLATION

DQC.

NO.

KOC.MP-027

PART

3

STANDARDS

TEAM

dlrQ*

7/25/2019 KOC-MP-027 part 2


DOC.

NO.

KOC-MP-027

pART

2

Page

2

of

64

REV.

1

KOT

RECOMMENDED

PRACTICE

FOR

PRESSURE

RELIEF

DEVITE$:

SIZING,

$ELECTION,

TWINNING

ANN

INSTALLATIGN

ttc"

N0.

K00-Mp-f ?7

PART

2

ISSUING

AUTHORITY:

STANDARDS

TEAM

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KÐC ¡?P

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1.a

7/25/2019 KOC-MP-027 part 2


Doc.

ilo

Koc-MP.0?7

PART

2

Page

3

of

84

REV.

l

TABLE

OF CONTENTS

FOREWORD

1.0 scoPE

2.0

APPLICATION

3.0

TERMINOLOGY

3.1

Definitions

3.2

Abbreviations

4.0

Paq.e No.

5

6

6

5.0

6.0

7.0

8.0

9.0

l5

15

16

16

REFERENCE

STANDARDS, CODES

AND SPECIFICATIONS

4.1

tlonflicts

4.2

List of

Standards

and Codes

4.3

Project

Specifications

4.4

Order

of

Precedence

ENVI ROF¡I\{F NTAL

CO N DITIO NS

HEALTH,

SAFETY

AND

ENVIRONMENT

PRD:

FUNCTION

AND

TYPES

OF

PRESSURE

RELIEF

DEVICES

PRD:

PRV

SIZING

PROCEDURE

AND REQUIREMENTS

PRD:

CìlTERlA

AND SELECTION

PROCEDURE

9,1

PRV

Selection Criteria

9.2 PRV

Selection

Procedure

12

12

12

'14

14

7

7

12

1B

18

18

10.0

PRD: SETTING;

TWINNING;

INSTALLATION; INLET/OUTLET

PIPING

19

10.1

PRV:

Pressure

Setting Requirements

19

10.2

Rupture

Disk

Requirements

20

10.3

trRV:

Twinning

Requirements

20

10.4

PRV:

Installation

Requirements

2'l

10.5

Rupture

Disk:

lnstallation

Requirements

22

10.6

PRD:

lnlet

Piping

Requirements

22

10.7

PRD: Outlet Piping

Requirements

23

10.8 PRD: Drain

Piping

Requirements

26

10.9

PRD: Bonnet and

Pilot

Vent

Piping

Requirements

26

l't,0

PRD: ISOLATION

VALVE

AND

CAR-SEAL

REQUIREMENTS 27

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&

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2

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4

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64

REV. 1

11.0 PRD:

INSTALLATION

ON

DRILLING

RIc.REQU|REMENTS

25

28

29

30

12.0

PRD:

PW

FFOR

ATMOSPHERIC

AND

LOW-PRESSURE

STORAGE TANKS

13.0 PRD:

THERMAL

RELIEF VALVE

14.0

PRD:

HANDLING

AND

STORAGE

15.0

¡NSPECTION

AND

TESTING

30

15,1

Pressure Relief Valve

(PRV)

30

15.2

Rupture

Disk

31

15.3 lnspection

and

Cleaning

of

System

before

PRV

lnstal¡et¡on

31

16.0 DOCUMENTATION

16.1

tSeneral

f 6.2

Deliverables

32

32

32

32

7.0

18,0

SPARE

PARTS

&

MAINTENANCE

DATA

APPEND]CES

33-62

APPEI{9gl_

DATA

SHEET: SPRING.LOADED

PRESSURE

RELIEF

VALVE

DATA SHEET: PILOT.OPERATED

PRESSURE

RELIEF

VALVE

DATA

SHEET:

RUPTURE

DISK

DEVICE

33

34

35

APPENDIX

2

PRD:

ltl-HOUSE

INSPECTION

AND

MAINTENANCE

REQUIREMENTS

36

APPENDIX 3

PRD:

TYPES, FUNCTIONAL

CHARACTERISTICS,

AND

USES

1.

Spríng-Loaded Pressure

Relief

Valve

(PRV)

2.

Pilot-Operated Pressure Relief Valve

3.

Rupture

Disk

(Non-Reclos¡ng

Pressure

Relief

Device)

4. PRV:

TABLE

FOR

SELECTION OF

ORlFlcE

SIZE

37

37

38

38

38

APPENDIX

4

PRD:

TYPES,

DESIGN

AND

GENERAL

DETAILS

39-46

APPENDIX

5

PRD:

TYPICAL INSTALLATION

AND

PIPING

47-62

ACKNOWLEDGEMENT

63

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REV. 1

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o

FOREWORD

This document

KOC

Recommended

Practice for

Pressure

Relíef Devices:

Sizing,

Selection,

Twinning,

and

lnstallation

(KOC-MP-027 PART

2)

is

intended

to

provide

the

basic

guidelines

and

minimum

technical

requirements

for sizing,

selection,

twinning

and

installation of

Pressure Relief

Devices

(PRD)

to be installed

on

pressure

vessels,

pressure

equipments,

pressure

systems,

and

atmospheric

and low

pressure

storage

tanks throughout

KOC

facilities

and installations.

This Recommended Practice

(RP)

has

been

approved by

the

Standards

Team,

in

consultation

with

the

Standards

Technical

Committee

(STC)

for use and

application

throughout

the

corporate

engineering

and

operational functions

of Kuwait

Oil

Company.

This Recommen,Jed Practice sets

out

to achieve the following

objectives:

//

To

specify basic

technical specifications

and

requirements

for

sizing,

selection,

twining

ano lnstallation

of

pressure

relief devices

that

have

applicabìlity

in

KOC

with

a

view

to

achieve

quality,

reliability,

efficiency

and

performance,

as

well

as

cost effective approach.

>

testing

requirements

of

Pressure Relief

Devices

so

as

to

minimize

the

need for

technical

clarifications and disputes,

>

and

envirorment as estâblished by

KOC

Fire

and

Safety

Regulation,

Health,

Safety and Environment

Management

System

(HSEMS)

and

HSE

Policy.

Feedback,

comments

or

suggestions,

derivecl from the

application

of

this RP at

any

stage

of

design,

purchase,

manufacture, field installation, operation,

and maintenance

are encouraged,

and

should

be

directed

to:

The

ïeam

Leader

Standards

(Chairman,

Standa rds

Technical

Committee)

lndrtstriaì

Services

Group,

KOC

P,

O. Box 9758, Ahmadi 61008, State of

Kuwait

Tasf

Fprge.Fpsponsible

for This Recommended

Practice

The

Standards

Technical Committee (STC) has

entrusted

the preparation of

this RP

to

the

Task

Force

No.

(TF-MPl07)

consisting

of the following:

Mr. Mirza Mohsin

Mr,

Raj Maharaj

Mr. Adnan

Bohammed

Mr.

Yousef M. Zaman

Mr. Nawaf

Al-Shehab

Mr. Mohammed

Al-Aimi

Standards

Team

Major

Projects Team

Design Team

Opns, Tech. Svcs.

(SK)

Opns. Tech.

Svcs.

(NK)

Opns.

Tech, Svcs,

(WK)

TF

Leader &

Author

Member

Member

Member

Member

Member

Ex

Ex

Ex

Ex

Ex

Ex

6137

1

66975

61815

22241

23437

20336

tl

d) Ð

o

(--

7/25/2019 KOC-MP-027 part 2


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PART

2

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I of

64

REV.,

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Þ

1.0 scQPE

1.1

This

Recornmended

Practice (RP)

describes

basic

technical

guidelines

and

requiretnents

for

$izing,

Selection,

Twinning,

lnstallation,

lnletlOr.rtlet

piping,

and

lnspection

and Testing

of

"Pressure

Relief

Devices"

for

installatìon

on

pressure

vessels,

pressure

equipment,

pressure

systems,

atmospheric

and

low

pressure

storage

tanks, and

pipelines

/

plant piping

with stranded liquids,

at

KOC onshore

facilities

and

installations.

1.2

Any

project

specific

requirement

shall be

furlher

elaborated

and described

in

KOC Data

Sheet

(Appendix-1)

and/or

Purchase Document.

2.0

APPLICATION

21

The

PressL¡re

Relief

Devices

(Pressure

Relief

Valve, and

Rupture

disk)

covered

in this

RP

are

intended

for

unfired pressure vessels (except

steam

boilers),

pressure

equipment,

and

pressure

systems

whose operating

pressure

is

103.¿

kPa (15

psig)

or

greater.

2,2

The

Pressure

Relief

Devices

(Pressure

Vacuum

Valve)

covered

in

this

RP are

intended

for

atmospheric

and low

pressure

storage

tanks

for

liquid

hydrocarbons

(sweet

or sour) and

designed

to

operate fronr

vacuum

through

103.4

kPa

(15

psig),

2.3 The

Pr,rssure

Relief

Devices

(Thermal

Relief

Valve)

covered

in this

RP

are

intended

for

relief

of

the

stranded

liquids

due

to

thermal expansion

in

the

tightly

closed

pipelines, plant

piping

and other

systems.

24

The

PF.D

covered in this

RP

are intended

to

protect

unfired

pressure

vessels,

equipments

and

pressure

systems including atmospheric

and

low

pressure

storage tanks

against

overpressure during

normal operating and emergency

conditions

such

as fire

contingencies.

2.5

The

PRD

covered in

this

RP

are

not intended

to

protect

pressure

vessels,

pressure

equipments,

pressurized

systems, and atmospheric

and low

pressure

storage

tanks, and

piping

from

structural

damage

or mechanical

failure

when

such items are exposed to extremely

high

temperatures

such

as during a fire.

¿.o This

RP

does not

cover

the

U-type

blow out

wet

legs,

the surface-safety-valve,

the

subsurface-safety-valve and

the

pressure relief

devices

installed

on

drilling

rigs anci its

associated equipment

and

vessels

etc.

2.7 This

RP

does

not cover

thermal relief valve of

size

less than

3/n

x

1

in

2B The

PFID

covered

in

this

RP

are

not

intended

for

use

on

pressure

vessels

that

are

used

for transportatron

of

liquid

hydrocarbon

in

bulk

on

the

roads.

"1,û

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R

3.0

3.1

31.1

3.1.2

TERryllNoLocY

Definitrons

For

the

purpose

of this

Rp,

the

following

definitions

shall

apply.

However

for

additional

details

refer

to

APt

520

and

Apt 576:

Accumulation

Accumrllation

is the

pressure

increase

over

the

maximum

allowable

working

pressure

of

the

vessel

during

discharge

through

the

pressure

relief

valvel

expressed

as

a

percentage

of

that

pressure,

or

actual

pressure

units.

Back

Pressure

This

is

the

pressure due

to

the

combined

effect

of

superimposed

and

built-up

back

pressure

in

the discharge

side of

the vafve.

a)

-ÐunerimposeO

g

superimposed

back

pressure

is

the static

pressure

in

the

discharge

lieader

before

the safety

relief

valve

opens.

b) Constant

Suoerimnosed

ressure

c)

This

type

of

back

pressure

remains

essentially

at

a fixed value

iconstant)

and

exists (superimposed)

continuously prior

to

and

during

opening

of

the

valve.

Variable

Supçilmposed

Backpressure

T his type

of

back

pressure

varies

or

changes

over

a range

from

a

minimum

to

a maximum,

or vice

versa.

The

actual back pressure

at

any

specific

time

depends

on

conditions

in

the

piping

system

to

rvhich

the

outlet

of

the

valve

is

connected.

3.1.3

Blowdcwn

Blowdcwn

is

the

difference

between

set

pressure

and

reseating

(closing)

pressure

of

a

pressure

relief

valve,

expressed

as

a

percentage

of

the

sãt

pressur e,

or

in

actual

pressure

units,

3.1.4

Built-up

Back

Pressure

Built-up

back

pressure

is

the

pressure

which

develops

at

the

valve

outlet

as

a

result

of

flow

through

the

valve,

after

the

pressure

relief valve

has

opened.

ry

ú

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3.1.6

3.1.7

3 1.8

3.1

,9

3.1 10

3.1.11

Car

Se:l

A

self-locking

seal

intended

for

sealing

or

locking

the

isolation

block valves

ínstalled

with

pressure

relief valves assembly,

wtren car-seal is

ptaceJ

in

position

and

closed,

it

locks

perfectly

and

securely

and

can

not

be opened

or

removed

unless

cut

with

the

wire

cutter

or

physically

broken

intentionally

in

order

to be

removed.

Closing

Pressure

The

closing

pressure

is

the

point

at

which

the

pressure

relief

valve

recloses.

This

signifies

the

value

of

decreasing

inlet

static

pressure

at

which

the

valve

disc

re-establishes

contact

with

the

seat

or

at which

tift

becomes

zero,

as

determrned

by

seeing,

feeling

or

hearing.

Cold Differential

Test

Pressure

(CDTP)

cold

differential

test

pressure

is

the

set

pressure

at

which

the

valve

is

adjusted

to open

on

the

test

stand.

This

pressure

inciudes

the corrections

for

back

pressure

and/or

temperature

and

service

conditions,

Conventional

Safety

Relìef

Valve

A

conventional

safety

relief

valve

is a

direct

spring

loaded

pressure

relief

valve

whose

operational

characteristics

i.e. opening

pressure,

closing pressure,

and

relieving

capacity

are

directly

affected

by

changes

in

the

back

pressure.

Flutter

Flutter

is the

abnormal,

rapid

reciprocating

nlotion

of

the

movable

parts

in

which the

disc

does

not fully

sit

on the

seat

of

a

valve.

Leak-Test

Pressure

It

is

the

specified

inlet

static

pressure

at

which

the

seat-leak

test

is

perfonned.

L¡ft

Lift

is

the

actual

travel

of

the

disc

away

from

the

closecl

position

when

a

valve

is

relieving.

3.1.12

KOC

Controlling

Tearn

Any KOC

Team

authorized

to

initiate

a request

for

procurernent

of

nlaterial

and/or

equipment

for

Koc,

or any

Koc

ream

that

conrrnands

and/or

manages

andlor controls

and/or executes

a

KOC

project.

ì

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3,1.13

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1.'t4

3.1

,15

Manufacturer

/ Vendor

The

Manufacturer

or

Vendor

is the

original

equipment

manufacturer

or

its

authorized

company

responsible

to

deliver

/

supply

the

eguipment

and

on

whom

the

KOC

places

the

purclrase

order.

Maximum

Allowable

Working

Pressure

(MAWP)

The

maximum

allowable

working

pressure

ís

the

maximum

gauge

pressLrre

permissible

at the top of

a

complete

vessel

in its

normal

operating

position

at

the

designated coincident

temperature

specified for

that

pressure.

A vessel

may

not be

operated

above

this

pressure

at

any

metal temperature

other

than

that

used

in its

design.

consequently,

for that

metal temperature,

it is

the

highest

pressure

at

which

the

pressure

relief

valve is set

to

open.

Maximum

Operating

Pressure

(MOP)

The

maximum operating

pressure

is

the

gauge

pressure

which is

expected

or

anticipated

during

the

operation

of a

pressure

system

or

the vessel

or

equiprrent,

3.1.16

Non-re,:losing

Pressure

Relief Device

A

pressure

relief

devíce,

which

remains

open after operation

and

does

not

reclose

itself

unless

manually

reset or replaced.

Rupture

disk

is

an example

of

Non-reclosing device.

3,1.17

Opening Pressure

The

value

of the

increasing

inlet static

pressure

at

which

there

is

a

measurable

lift

of

the

disk or

at

which

the

discharge

of the

fluid becomes

contìnuous as

determined

by seeing, feeling,

or

hearing.

3.1

.18

Operatrng Pressure

The

operating

pressure

is

the

gauge

pressure

to

which

the

vessel

or

equipr'ent

is normally subjected

during service.

3.1.19 Overpr:ssure

Overprnssure

is a

pressure

increase

over the

set

pressure

of

the

pressure

relief

valve. Overpressure is

similar

to

accumulation

when

the

relieving

device

is

set at the

maximum allowable

working

pressure

of the

vessel.

The

overpressure

is

generally

expressed

as

a

percentage

of

set

pressure

or in

pressu.e

units.

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3.1

.20

Pressu'e-Relief Valve

(PRV)

A

pressure

relief

valve

is

a

pressure-relief

device designed

to

open

and

relieve excess pressure and

to

reclose

and prevent further flow

of

fluid

after

normal

conditions

have

been

restored.

A

pressure-relief

valve

opens

when

its

upstream

pressure

reaches

the

opening

pressure,

lt then

allows

the

fluid

to

flow

until

its

upstream

pressure

falls

to

the

closing

pressure.

lt

then closes

prevenring

any

further

flow.

Examples

of

specific types of

pressure-relief

valve

include

Safety

Valve,

Relief-valve,

Conventional Safety Relief

Valve,

Balanced

Safety

R.elief

Valve,

and

Pilot-operated

Pressure-relief

Valve.

3.1.21 Pressu'e-Relief

Device

(PRD)

The

Pressr¡re Relief

Device comprises

of

the

Pressure

Relief Valve,

the

Relief

Valve, lhe

Safety

Relief

Valve, the

Safety Valve,

and

the Rupture

Disk etc.

As

such

the

PRD could

be

any

of

the

above device

intended

to

protect

the

pressure

vessels, equipment

and

personnel

by

automatically

opening at

predetermined

pressures

and

preventing

the destructive

consequences

due

to

excess:ve

pressures.

3.1.22

3.1.23

Pressure

Vacuum

Valve

(PW)

A weight

loaded,

spring-loaded

valve.

used

to

relleve

excess

pressure

and

lor

vacuum

that

has

developed

in an

atmospheric

or

low

pressure

storage tank.

Rated

t)apacity

Rated ,:apacity

is the

percentage

of

measured

flow at an

authorized

percent

overpressure

permitted

by the

applicable

code,

Rated

capacity is

generally

expressed

in kilograms

per

hour

(kg/hr)

or

pounds

per

hour

(lbslhr)

for

vapour;. For

gases

it

is

expressed

in

normal cubic

meters

per

minute

(NCMlrnin)

or

m'/min

or

standard

cubic

feet

per

minute

{SCFM),

and

for

liquids

in

litres

per

minute

(L/min)

or

gallons per

minute

(GPM).

3.1.24

Relief

\/alve

(RV)

A

relief

valve is a spring

loaded

pressure

relief

valve

actuated

by the static

pressuie

upstream

of

the

valve

and

it

opens

normally in

proportion

to

the

pressuie

increase

over

the

opening

pressure,

A

relief

valve

begins

to

open

when

the

static inlet

pressure reaches

set

pressure,

As

the

static

inlet

pressu'e

overcomes

the

spring

force,

the

disk

begins

to lift

off the

seat,

allowing

flow

of the liquid.

The

value

of

the

closing

pressure

is

less

than

that

of the set

pressure

and

wìll

be

reached

after

the

þlowdown

phase is

completed.

Relief

valves are

normally

used

for incompressible

fluids

i.e.

liquids.

&

*

o

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C'

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REY.1

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(iì

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ú

3.1

.25

Relievirrg

Conditions

It indicates

the

inlet

pressure

and

the

temperature

of

a

pressure

relief device

during an overpressure

condition.

The

relieving

pressure

is

eqLral

to the

valve

set

pressure

(or

rupture

disk

burst

pressure)

plus

the

overpressure.

(The

temperature

of the flowing

fluid

at

relieving

condition

may

be

higher

or lower

than

th,:

operating

temperature.)

3

1.26

Safety

Relief

Valve

(SRV)

A safety-relief

valve

is a

spring-loaded

pressure

relief valve

that

may

be

used

as

either

a

safe$

valve (íntended

for

incompressible

fluids)

or

relief

valve

(intended

for compressible fluids) depending

on

the

application.

A safety

relief

valve

is

an

automatic

pressure-relieving

device

which

may

be

used as either

a

safety

or

relief valve

depending upon

application.

3,1.27

Safety

Valve

(SV)

A

safety valve

is

a

spring

loaded

pressure-relief

valve that

is

actuated

by the

static

pressure

upstream of

the

valve

and characterized

by rapid opening

or

pop

action.

When the

static inlet

pressure

reaches

the

set

pressure

it

will

increase

the

pressure

in

the

huddling chamber

and

overcome

the spring

force

on the disk. This

will cause

the

disk to lift and

provide

full

opening

at

minimal

overpressure.

A

safety

valve

is

normally

intended

for

compressible

fluids such

as

gas,

air or vapor etc.

3.1.28

Seat

ïightness Pressure

Seat

tlghtness

pressure

is

the

specified

inlet static

pressure

at

which

a

quantitative

seat

leakage test

is

performed

in

accordance

wìth

a standard

procedure.

3,1

,29

Set

Pressure

Set

pressr¡re

is

the

gauge

pressure

at

the

valve inlet, for

which

the

safety

relief valve has

been

set

to

open under

service conditions. In liquid

service,

set

pressure

is

determined

by the

inlet

pressure

at

which

the

valve

starts

to

discharge.

ln

gas

or vapour service,

the

set

pressure

is

determined

by

the

lnlet

pressure

at

which

the

valve

pops,

3.1.30 Simmer

Simmer is characterized

by

the

audible

passage

of

a

gas

or

vapor

across

the

seating

surfaces

just

prior

to

pop .

The difference

between

this

start

to

open

pressu-e

and

the

set

pressure

is

simmer,

and is

generally

expressed

as

a

percentage

of

set

pressure,

I

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R

.

o

1'

3.2

Abbreviatjons

HSE

HSEMS

ITP

KOC

MAWP

MOP

PIM

PRD

PRV

PW

Health,

Safety

and Environment

Health, Safety

&

Environment Management System

lnspection

and

Test

Plan

Kuwait Oil Company

(K,S.C,)

Maximum

Allowable

Working

Pressure

Maximum Operating

Pressure

Pre-lnspection

Meeting

Pressure Relief

Devices

Pressure

Relief

Valve

Pressure

Vacuum Valve

4.0

REFERENCE

STANDARDS,

CODES AND

SPECIFICATIONS

4.1

Conflicts

ln

the

event

of a

conflict between this RP

and

the

standards

and

codes

or

specifications

referenced herein, or

purchase

or

contractual

requirements,

the

subject

shall be brought

to

the

attention of

KOC

Controlling

Team

for

review,

consideration,

and

resolution

or

amendment

by

Standards

Team,

if

required.

4.2

List of

Standa

and Codes

The

latest

edition

of

the following

standards,

codes and

specifications

shall

apply:

4.2.1

Nation¿rlllnternationalStandards

API

Stc

510

Pressure

Vessel lnspection

Code-Maintenance

lnspection,

Rating. Repair,

and

Alteration

API RP 520

Partlandfl

API

RP

521

API

Stc

526

APt

Srd 527

API

RP 576

API

RP

578

Sizing,

Selection, and

lnstallation of

Pressure

Relieving

Devices

in

Refineries:

Part

I

-

Sizing

and

Selection

Part ll-

lnstallation

Guide

for Pressure-Relieving

ancl

Depressurising

Systems

Flanged

Steel

Pressure

Relief

Valve

Seat

Tightness

of Pressure

Relief

Valve

lnspection

of

Pressure

Relieving

Devices

Material

Verificatìon

Program

for

New

and

Existing

Alloy

Piping

Systems

z

o

ú

*

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Page

13

of64

REV.

{

ER

API

Stc'2000

ASME

:3ec.

Vlll

Dívision

1

ASME

316

5

ASME

,331.3

ASME

PTC

25-2001

BS EN

ISO

4126

(Part

1-7)

BS

tSO

6264

BS

PD 5304

lso

90110

ISO

sOrl1

NACE

VlR

0175

/

tSO

15156

Part

1-3

Venting

Atmospheríc

and

Low-pressure

Storage

ïanks

Boiler

and

Pressure

Vessel

Code

Pipe

Flanges

and

Flanged

Fittin

gs

NPS

Through

NPS

24

Process

Piping

Pressure

Retief

Devices:

performance

Test

Codes

Safety

Devices

for

Protection

Against

Excessive

Pressure

Hydraulic

Fluid

Power-pressure

Relief

Valves-

Mounting

Surfaces

Safe

Use of

Machinery

Quality Management

Systems

-

Fr.lndamentals

and

Vocabulary

Quality Management

Systems

-

Requirements

Petroleum

and

Natural

Gas

lndustries.

Materials

for

Use

in

H2S-Containing

Environments

in

Oil

and

Gas

Production

Part

1;

General principles

for

Selection

of

Cracking-Resistant

Materials

-

part

2:

Cracking

Resistant

Carbon

ând

Low

Alloy

Steels,

and

the

Use

of

Cast

lrons

-

part

3:

Cracking-

Resistant

CRA

(Corrosion-Resistant

Alloys)

and

Other

Alloys

KOC

Standard

for

Hazardous

Area

Classification

KOC

Standard for

Basic

Design

Data

osHA

1e10.219

Mechanical

Power Transmission

Apparatus

4.2.2

KOC

Siandards/RP

KOC-c-002

KOC-G-007

KOC-G-009

KOC

Standard for

Spare

Parts

and

Maintenance

Data

KOC-l-,10'i

KOC

Standard

for fnstrumentation

and

Control

System

Design

Koc-MP-027 Parl1

Koc

standard

for

Pressure

Relief

Devices:

Design

and

Materials

*

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REV-

1

381102r 01

KOC

Recornmended

practice

Qualification

and

Utilization

lnspection

Seruices

for

Selection,

of Third

Party

4.3

Koc-HSE

Document

Koc

Fire

and

safety

Regulations

(Latest)

Proiect

Specifications

ln

addition

to the

KOC

Standards

and

Recornmended

Practices

referenced

in

clause

4.2.2

above,

the

KoC

Controlling

Teams

shall

desígnate

other

relevant

speclfications

if

required,

for

the

titles

listed

below:

Title/Description

a)

General

lnstruments

b)

Recommended Practice

for

lnspection

and

resting

of

New

Equipment

gldF¡*eferecedgqce

The

supply

of

equipment,

materials,

services

and

documentation

shall

be

in

accordance

with

the

state

and local

regulations,

Data

sheets

or

purchase

Order

requirements

of

specific

project.

Should

any

conflict

exist

between

the

listed

documents,

then

the

most

stringent

shall

govärn,

ln

case

further

clarifícations

are

required,

the

subject

shall

be

brought

to

the

attention

of

KoC

controlling

Team

ín

accordance

with

clause 4.1

af tñ¡s

Rp

ln

generaf

the

following

sequence

of

precedence

shall

apply:

a)

l.(uwait

Government s

Rules

and

Regulations.

b)

KOC

Project

Data

Sheets

and drawings.

c)

KOC

Purchase

order

and

specifications.

d)

l-his

Koc RP

(Koc-MP-027

part

2)

and referenced

standardslRp

e)

[t/anufacturer s

i

vendor s

standards

and

specifications.

4.4

4.4.1

4.4.2

4.4.3

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REV.

T

5.0

5.1

E

NVIROIIM

ENTAL

COl,¡

DITIONS

The environmental

conditions

in Kuwait

are

severe.

Refer

to

KOC

Standard

for

Basic Design Datä

(Koc-G-007),

which

provides

the

basic

information

required

for

design such

as the

temperature,

wind,

environmental,

site

and

utility supply conditions

prevailing

throughout

the

KOC facilíties.

5.2

The

Pressure

Relief

Device(s)

(including

components)

covered

in

this RP shall

be

suitable for continuous

operation

in

the

environmental

conditions

specified

above.

6.0

HEALTH..åAFETY

ANÐ ENVIRONMEI.¡T

6.1

All

applicable

safety requirements

of Occupational

Safety

and

Health

Administration

(OSHA)

Standard

1910.219

and BS

PD 5304

shall

be

considered

in

the

desígn,

manufacture,

and

assembly

of

the

equipment

covered

by

this

RP,

6.2

The

ManufacturerÄ/endor/Contractor

shall comply with

KOC

Fire and

Safety

Regulaiions

and

KOC

Health, Safety & Environment

Management

System

(HSEMS)

for

the

protection

of

KOC

personnel,

adjacent

equipment,

property,

and

the

environment during

the design, manufacture.

assembly

or operation

and

maintenance

of

all equipments and

accessories covered

by this

RP.

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REV.

,I

7.0

PRD: FUNCTION

AND

TYPES

OF

PRESSURE

RELIEF

DEVICES

ln all

pressurized

systems,

the overpressure

relief

can

be

achieved

with

a

variety

of

mechanisrns

which

include pressure relief

valves.

rupture disks

or

a

combination

of

the two devices.

7,1

7.2

ïhe

types of Pressure

Relìef

Devices

(pRD)

are described

as

under:

a)

Spring-Loaded

Pressure

Retief Valve

(pRV)

i)

Conventional

Type

ii)

Bellows

Type

iii)

Balanced

Bellows

Type

(with

Auxiliary Balancing

piston)

b)

Pilot-Operated

Pressure

Relief

Valve

c)

Rupture Disk

7,3

For additional

details

and

functional

characteristics,

distinctive

features,

types,

categories,

and

uses

of

PRD,

refer to Appendix-3

and Appendix-4

of

this

Rp.

8.0

PRD: PRV

SIZING P

AND

REQUIREMENTS

8.1

Spring-Loaded

Pressure

Relief

Valve

shall only

be used

on

pressure

vessels,

equipment,

pressurized

systems, and ahnospheric

and

low

pressure

storage

tanks.

B2

The

siz:ing

of

the

PRV should

be

done

in

accordance

with the

procedure

described in

API

520

Part

1.

8.3

When

sizing

PRV for

gas

or

vapors

service,

critical or subcrjtical

flow

condìtions

should be determined.

8.4 lf the

piessure

downstream of

the

PRV

is less than

or equal

to

the critical flow

pressure

P ¡

then

the

flow

will

be

critical, ln

such

condition

the

effective

discharge

area

required to

achieve a desired

flow

rate

should be

calculated

based

on equations as specified in clause

3.6.2 of

API 520

Part

l.

8.5

lf

the

ratio of

the

back

pressure

to

inlet

pressure

exceeds

the critical

pressure

ralio

Pr¡

lPr

(where

Pr

is

the

inlet

pressure

of the PRV

at

relieving conditions)

then tha flow

will

be

subcritical.

ln

such

situation the

effective

discharge

area

required to achieve a

desired flow should be

calculated

using

the

equations as

given

irr

clause

3.6.3 and 3.6.4

of

API

520

Part

l.

8.6

When

sizing PRV the

conditions

for the

overprotection

should

be evaluated

8,7

Particular consideration

should

be

given

to

deternrine various

contingencies

that are

the

basic cause of overpressure.

$uch contingencies must

be

evaluafed

in

terms

of

pressure generated

and the rate at which

the

fluid shall

be

relieved.

2

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*

B8

8.9

810

8.1

1

8.12

STEP:1

8.13

STEP-2

8,14

STEP-3

The

process

flow

diagram,

material

balance,

p&lD,

equipment

specification

sheet

and

design

basis must

be

considered

while

calculating

the

relieving

rates

required

for

PRV.

The

re,luired

PRV

orifice

area

(calculated

as

per

equations

gíven

in

Apl

520

Part

l)

¡hould

be

compared

with

the

standard

PRV

orifice

area

as

given

in

Apl

526 anC in

Taþle-1 of

Appendix-3

of this

Rp,

The

PRV orifice area

selected

from the

Table-1

must be

at

least

equal

to

or

greater

than

the

required

PRV

orifice

area.

The

guidelines

in

steps

described

below

may

be

adopted

for

basic and

preliminary

sizing

of PRV.

calculate

the required

PRV orifice

area

(A

in.2)

using

the equations as

provided

in clauses

3.6

to

3.10 of

API 520

Part

1.

For solving

the

above

referenced

equations

the following

basic

and

information

(data)

shall

be

requíred:

a)

O¡:erating

pressure

b)

Set

pressure

c) O¡reratingtemperature

d) Relievingtemperature

e) Relieving

pressure

0

Design temperature

g)

Ty,pe of

fluid

h)

Required

relieving

capacity

i)

Allowable

overpressure

(10 ,

or

16 ,

or

21a/o

I

j)

Back

pressure

k)

Gas

and

Vapour

(Compressibility,

Molwt.,

Density,

and

(CozC))

l) Liquids(Sp,Gravity,Viscosity)

Determine

the required

PRV

orifice

area

calculated

from equations

of

API

520

Pad 1.

ln

order to

make

a choice

between conventional

type,

bellows type, or bellows

type

with auxiliary

balancing

piston

PRV, check and confirm

the

back

pressure

and

otlrer

requirements

as

described in Clause

9.2

of

this RP. lf the back

prêssu:'ê

is

within

the

limits choose

the

conventional

type

PRV, otherwise

if

back

pressure

exceeds

the limit

go

for

bellows

type

PRV.

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{

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*

t-

8.15

STE

9.0

9.1

9.1.1

The operating

pressure

requirements

should

be

checked

against

the

valve

set

pressure.

lf

the operating

pressure

exceeds

g0%

of

thä

set

pressure,

orothen¡l;se if the differentíal pressure is less

than

25

psig,

analyse

and

examine

the system

and

the

valve

setting

parameters

in order

to

achieve

a

proper

differential

p

ressu

re.

PRD:

ÇRITEB¡A

AND

sEl-EcrtoNf

RocF

DU,F,E

PBV

Seleclipn

Critsria

The

PRV selection

criteria

shall be as

described

betow

briefly:

a)

Spring-loaded

type.

b)

Flanged type

¿Sce

Ctanse

8.

t.5

kt

tì.

t. r

t

u

KOC-,r.Íp-027

r\trt

r).

c)

l3olted

bonnet.

d)

Screwed

cap.

e)

Full

one

piece

nozzles.

0

.Suítable

for sour

service

(when

applicable)

9.2

BBY_9glection

PJocedure

9.2,1 PRV:

Conventional

Type

The

conventional

PRV shall

be

used

when

all

of

the

following

conditions

are

met:

a)

The sum

of

the

maximum

varrable

superimposed back

pressure

plus

the

built-up back

pressure

is

less

than

10%

of

the

PRV

set

pressure.

b)

Fouling or

corrosive service

conditions are not

expected

as

it may

affect

tha upper

part

of the

PRV.

9,2.2

PRV:

Bellows Type

ln

case the conditions specifìed

in

Clause

8.2.1

(a)

and

(b)

are

not

met, then a

bellows

type

PRV shall be used under

the

following

conditions:

a)

Ihe

sum

of

the

var¡âble

superimposed back pressure plus

the

built-up

back

pressure

exceeds

10%

of

the

PRV

set

pressure

or

cold

differential

set

pressure.

b) Fouling

or

corrosive conditions

are anticipated and

protection

cannot

be

afforded by using

alternative materials or

devices.

c) lf the service

fluid

is

highly viscor¡s or ûf

a nature

that it can enter

the

cr'tical clearances

between the

guidesldisc

holder,

)

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R.EV.

I

9.2.3

d)

lt is

essential

that

the

bonnet

of

a

bellows

type

PRV

when

installed,

shall

be appropriately vented

to

the

atmosphere.

PRV: Balanced Bellows Type

(with

Auxitiary Balancing piston)

The

balanced

bellows

type

PRV

with

auxiliary

balancing

piston

shall be used

under

the

following conditions:

a)

Back

pressure,

either

constant

or variable

is

present

or anticipated.

b)

Excessive

pressure

may

built-up

in

the

bonnet

as a

result

of

pressure

build-up

in the

bonnet-vent

piping

(as

a result

of buirt-up

bonnet

pressure,

a

perilous

condition

cot¡ld occur

any

moment).

c)

lt

must be ensured

that

when

balanced bellows

type

PRV

with

auxiliary

balancing

piston is installed,

their

bonnets are appropriately vented

to the

atmosphere.

10.0

PßQ:

SETTINQ;.IUlNNlNg;.IN TALLATION:

INLET

I

oUTLET

PtPtNG

10.1 PRV:

Pressure

Setting

Requirements

10.1

,1

The

pressure

settings

of

all

PRV

shall be carried out

in

accordance

with

the

rules,

procedures,

and requirements

of

ASME Section

Vlll

Div.1

.

10.1.2

The spring

in a

pressure

relief

valve shall

not be set

for

any

ptessure

more

than 5%

above or below

for which

the valve

is marked, unless the

setting

is

within

the

spring design range

established

by

and

acceptable

to

the

Manufacturer

or

his

authorized

vendor.

10,1

.3

1

0.1 ,4

10,1

5

10,1 .6

The initial

pressure

adjustment

shall be

performed

by

the

Manufacturer

or his

authori:ed

representative

in

their

shop

and a

data tag

shall

be

provided

at

the

valve

hody

that

shall identify the

set

pressure

and date.

The valve shall

be

provided

complete

with

a

seal identifying

the

Manufacturer,

and

his

authorized

rep

resentative

who

perforrned

th

e

adjustment.

The set

pressure

tolerances,

plus

or

minus,

of

pressure

relief

valves

shall not

exceed

2

psi (13,8

kPa)

for

pressures

up

to

and including 70

psi

(483

kPa)

and

3ol,

for

pressures

above

70

psi (483

kPa).

The

rnarked

capacity of a

PRV

when

installed

with a

rupture

disk

device

(See

Figure-8 of Appendix-4,

and Figure-7

of

Appendix-5

of this RP) shall be

multiplied

by

a

factor of

0.90 of the rated

relieving

capacity

of the

PRV when

used alone.

It

must

be

ensured

that

the

PRV

pressure

setting once done

as

per

KOC Data

Sheet shall not

be

altered

or

modified unless following

the

appropriate

and

relevart

KOC

procedure. (Also

see

Clause

15.1.6 of

this

RP)

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of

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10,2

10.2:l

14.2.2

10,2.3

14.2,4

10.2

5

10,2,6

10.3

10.3.1

10.3.2

Ru

re Disk

Require

ts

The

rupture

disk

arone

shail

never

be

used

on any

pressure

vesser, pressureequipment, or pressure

systerns.

ln

case

ít

is

absorutery,,

genuinery,

and

specificaily

required

under

certain

conditions

as

mentioned

below

and'onry

after

written

lppàu"r

of

Koc:

a)

When

the

pressure

vessel

contaíns

material

that

may rencier

pRV

or

its

components

inoperative

due

to

choking

or

clogging,

or

b)

where

a

loss

of

valuable

material

by

leakage

should

be

avoided,

or

c)

Where

contamination

of the

atmosphere

by

leakage

ol

noxious

fluids

must

be

avoided,

or

d)

tlúhen

very

rapid

pressure

rise

are

anticipated

or encountered.

The

marked

capacity

of a

pRV

when

installed

with

a

rupture

disk

device

(see

Figure-B

of

Appendix-d

¿¡d

Figure-z

of

Appendi*-s"oi

this

Rp)

sr,"ù-uÀ

multiplied

by

a factor

of

0.90

of

itJrated

rerieving

."proty.

Alternatively

the capacíty

of

the combination

of the

rupture

disk

device

and

the

pressure

relief

valve

may

be

established

in accordan'ce

with the

requirer*nti

of

ASù*E

Section

Vlll

Div

1.

The

br,rst

pressure

tolerance

at

the

specified rupture

disk

temperature

shall

not

exr:eed

12 psi (r13.s

kpa)

of

the

marked

burst

pressure

up

to

and

t11yoi u

40

psi

(276

kPa)

and

*5yo

for

marked

þurst

påssure

above

40

psi

(276

kPa).

The

opening provided

through

the

rupture

disk,

after

burst,

shall

be

sufficient

to

perrrit

a flow

equal

to

the

capacity

of the valve

and

there

shall

be

no

chance

of

interference

wíth proper

functioning

of

the

valve.

But

in

no

case

this

area

silould

be less

than

the

area

of

the

inlei

of

the

valve

unless

tne

capacity

and

functioning

of the

specifìc

combination

of

rupture

disk

device

aná

pressure

relief

valve

have

been

established

by

test

in

accordance

with

the

requirenents

of

ASME

Section

Vlf I

Division

1.

PRV:

TWi

n n

itp

ß.e-q

Virçme.nts

Twin PiV

shall

be installed

on

all

pressure

vessels,

equipments,

and

pressure

systems,

atmospheric

and

low

pressure

storage

tanks

irrespective

of

pressute,

temperature,

or

service

fluids

and conditions.

The

PP,V

shall

be fitted

with isolation

block valves

with

Car-Seal

Open

facility,

*

o

t

z

\

A'-

q-D

7/25/2019 KOC-MP-027 part 2


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DOC.

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PART

2

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11

ofS4

REV 1

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10.3

3

1t.3.4

10.3 s

10,3.6

10,4.1

10.4.2

10,4.3

10.4.4

10.4

5

10.4.6

10.4.7

10.4

8

10.4

9

The isolation

block

valves

with

the facility

of

Car-Sealed-Open

shall

be used

to

help

remove

the

off

line

pressure

relief

valve

for

servicing

or maintenance

while

the

system

is

kept operating

with

the

second

pRV

oniine.

The

isclation valves

installed

with

pressure

relief

valves

shall

be

full-bore

roddable

type.

It should

be

ensured

that

both

the

twin

FRV

installed

on a

pressure

system

shall

be

identical

in

all

respect

including

size

and

capaciiy

and

prei.ur

setting

to

help

the

interchange

the

parts

and

reduce

the

inventóry.

For

details

showing

installation

of Twin

pRV,

{sofation

valves,

and

car-seals

gtc,

refer

to

Figure-10,

Figure-11,

Figure-12,

Fígure-13,

and

Figure-16

of

Appendix-5

of

this RP.

10.4

PRV:

lnstallatio

n

Reouirements

The

PRV installed

for

protection

of

pressurized

systems

from

overpressure

shall be

of

the

direct

spring

loaded

type in

accordance

with

ASMË

Section

V¡l

Div.1

u'lless othen¡¡ise

required

in

writing

by

KOC.

Each

relief

valve

shall

be

installed,

with

the spring vertical,

in

a

position

accês$,ble

for

inspection

and maintenance,

but

shall be

clear

of

waik

ways

where

relief noise

could

be

hazard

to operating

personnel.

The

piping

and its

support

shall

be designed

to

withstand

the

back thrust

or

pressure

when

the

valve

is

at

full

relief.

The valve

shall

not

be used

to

support

the doy¡nstream piping

or

any other

load.

The

vert

pipe

shall

be

positioned

so as

not

to cause any

hazard

to

personnel

or equipment

while

the

valve

is

relieving.

Ïhe

verlical

vent

legs

shall be

provided

with a

drain

hole

to

prevent

water

build

up

due

to

condensation

or

othenvise

in

the leg,

Appropriate canopy

or

cowl

should

be fitted

at the top of

verticalvent

to

prevent

entrance

of

rain

water.

The

pressure

relief

devices shall

be constructed,

located,

and

installed

so

that

they

are

readily accessible

for inspection.

replacement

and

repair,

ln the

:vent the

spring-loaded

PRv

is

not

fit

for

the

purpose

and does

not

meet

the

overpressure

protection

requirements,

the

pilot

operated

pressure

relief

valves

may be

considered

if it

is

absolutely,

genuinely,

and

specifically

necessãry and

only

after review

and

written approval

by KOC.

The

pressure

vessels

and

equipments

that are to

operate completely

filled with

liquid

shall be

protected

with

pressure

relief

devices designed for

liquid

service,

unless otherwise

protected

against

overpressure.

For

large

and lteavy

weight

PRV, an

appropriate

and

permanent

lifting

facility

shall

be

installed

for

servicìnglmaintenance

and

rernoval,

w

to

z

T

o

ú

*

ì

alØ

N¿

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KOG.MP.O27

FART

2

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22

of

84

10.5

10 5.1

'10.5

2

10.5

3

NOTE:

10,6

Rupture

Disk:

lnstallation

Requirements

Rupture

disk

shall not

be used

alone.

However

it

may

be

used

ín

conlbination

with

pressure

relief valve. See Clause

10.2

of

this

Rp.

When

a

rupture

disk is

installed

betr¡¡een

the

pressure

relief

valve

and

the

protected

vessel.

the

space

between

the

rupture

disk

and the

pressure-relief

valve

shall have

a

free

vent,

pressure

gauge,

trycock,

and

a

suitable

telltale

indicator

in such

a

way

that

it

shall

permit

detection

of

disk rupture

or

leakage

('\ce

F'i¿iure-,9

o,l

Áppendix-1,

onil

Figtre-7

n/'.1¡tpcncli.u-S

ol

thi,r

1?1,).

For

Additional

details

refer

to

API

520

Part il.

A

non-vented

space

in

the

rupture

disk

with a

pressure

gage

but without

an

alarm Õr warning

devìce

is

not

acceptable

as

a

suitable

equivalent

to

a telltale

indicator.

RËV.1

iyr

?'(1&,t¿

f

frf{?trð¡vCr

qf'

yJtf,Á

rr0jv

ûf;

fÄ¿-.qç¿¡frf

fi}:'{.tf f r/d¿

y4

'Í'he

¡tìptng

wr¡rfu

¿¡¡rd

mecl¡¿¡í&"rrf

sv¡le¡ps

p¿rsfsrs

o

cl¡¡¡¡ø¿y.¡r¡s/;t

e"rt-r

,ts rcllrwlf.e<¡rcnr'*

u/

vibrttÍion

llre ¡a;lr*v/./i,eqrßncy

of,

vibtutitltl

cf

¡ter;rule

rrjisf

vrdlr-,r.

¡lpùrg

rrtx./er

suril

r¡*,,fxrrrice/

.$)':r/c¡rr.r

'¡c. ,J

¿ld/cr'¡r'rlllsry'

ój,

t'd¡lo¡rs

rN*1tr¡r¡cl*

rrrl

ul

alrrrr¡ lyir?s

åsr

/Àg

¡uûsr

t'etiqbte

¡¡lglåo¿{

l* lr,.,i¡

l'jRl/

is

'rvd¡ecling

/lie

pressrre

relr'elygfue

¡ü

a

is.rl

r,tt

t¡

,'ibn¡ring,

¡¿¡åle.

IÏre

¡'-lre,.rr¡r¡a

¡ef¡'ejf u*lr,ix

prxxersr)tg

J¡.¡r*'

r¿¡tr¡'ol

jt'e(luencieÍ

inr ¡cdltè

¡/¡or

¡¡le¡¡

.¡/racfi#si

desþrr

is

/çÀr*ei"qål

a¡dle"rr.{/*.

llutrevar

tåu.r*

¡a'cssrrr

rtlicf

vañy.r

u,Lr¡cÁ

¡:r¡¡;Ì,ruls

lrigå rnetrrrrrl¡feí¿¡enf.¡l

r¡f viÞ¿rritrr9.gxrrr/y

.rlr'.,ng

nncl robu., .structur¿l

deÍign.

?Ï?d

Üitrt;i'r¡rl{/t'

pr

inslctllsr

rs

tåc;'eþnr

lr,¿¡'ndd

r{f

ic ,'nstirl¡

û

¡JreJ.rrJrc{

relie{

r,alve

u'tth

n*tural

n];:lior

ùl;erú¡iotk?l r'rr¡ÈJ

vihrutitsn

problents

enrrsirrg

f,'es.rir¡e

ruficf

laÅ,*

¡o

r,r¡rrrl,

ù( a

v{:r1,

l¡.¡rr

s¿,l

¡?rrî.errrté:

dn¿l

slail

/ecrÁì'trg'.

Senercrlllt

tlre

prc,l'slrre

relíet

t'aives ¿rr"'$r"rrr1

sn¿

usgr

in

tl¡e

iulutt:

¿o):rcs$

fi

igh

notural

.lì"*;¡reircic.r.

EBPJ@

10 6.1

The

pressure-rel¡ef

valve

ìnstalled

on a

line that

dìrecfly

connects

to

a

pressure

vessel,

the

total non-recoverable

pressure

losses

in

that line shall

not

exceed

3

percent

of

the

set

pressure

of the

valve

(5Þc

Figure-1,

f,'igtra-z,

ITigure-:), ITigure-

Ì0. Itigure- I

.

und [;igure-

I

2

of .,l/rytendix-S

q/'

this

ItP).

For

additional

details

refer to

API

520

Part ll.

'10.6.2

The

pressure-rel¡ef

valve

when

installed

on

a

process

line,

the

3

percent

pressure

drop

limit shall

be

applicable to

the sum of the

losses in the normally

non-flo',ving

inlet

piping

of

pressure-relief

valve

and

the

incremental

pressure

loss

in

the

process

line caused

by the flow

through the

pressLrre-relief

valve

(See

I;igure-l

o/'Á¡tpentlivi

o/'this IIP).

For

additional

details

refer

to API

520

Part ll,

10,6.3

The iniet

or

upstream

piping

to

the

valve should

therefore

be ås

short as

possible

and direct from

the

pressure

vessel

to

PRV.

E

w

f

o

ú

z

*

o

ù/

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REV. {

'10.6

4

10.6.5

10.6.6

1067

10.6.8

10.7

10.7.1

10,7.2

10.7.3

10.7,4

1t,7.5

The

inlet

or

upstreanr

piping

of

PRV should

be

constructed

to

have

a

suitable

radius,

avoiding

sharp

corners,

in

order

to

permit

smooth

flow

of

fluíd.

lf this

is

not

possible,

then

the

ínlet

piping

size

should

be

enlarged

at least

to the

next

higher

size

(dianreter)

unless

otherwise

required

by

Koc,

(sea

[.igre-4

ol

Åppand;x-S

aI

rhi.r

t{ ,)

ln case

the

pressure

drop

is

more

than

30/o

of

the

set

pressure

when

the

valve

is

flow

ng

at

full

capacity,

the

inlet

pipe

size

should

be,

as

an

alternatíve,

enhanc;ed

to next

higher

size

to

avoid

the

pressure

drop

in

the inlet

piping

from

the

pressure

vessel

up

to the

valve

inlet.

The

pressure

losses

in

the

pressure-relief

valve should

be

calculated

based

on

its

rate'J capacity.

lf

there is

any

possibility

of blockage

or

plugging

of

pressure

relief

valve or its

associated

piping

as

a

result

of

fouling

characteristics

of

process

fluid,

an

appropriate

purge

system

is

recomrnended.

The

manufacturer

should

be

consulted

for

appropriate

recommendations.

The

process

faterals

shall

not be

attached

or connected

to

the

inlet

piping

of

the PRV.

lt should

be ensured

that

pressure

drop

at

the

inlet

of the

PRV

sha¡

not

exceed

the

limit under

simultaneous

conditions

of

rated

flow

through

the

PRV

end

maximum

flow

through

the

process

lateral,

(see

Figure-B

of

Appendix-S

of

this

RP)

P

RD: Outlet Pioino Reou

irements

The outlet

piping

shall

be constructed and

supported

in

such a manner

that

no

unnecessary

mechanical

loads

and

moments due

to

discharge

reaction

are

transferred

to the valve

body.

The

ou,tlet

piping

shall be

supported

near

to

centreline

of the

piping

to

help

minimize

or

prevent

undue

stresses

on the

PRV.

The

m;¡ximum

permissible

load

transferred

to

the

valve body should

not

be

more than the

cumulative

load of

a

companion flange,

a

long

radius elbow

and

a short

vertical

pipe

or otherwise as

recommended by

the

Manufacturer.

It

should

be

ensured that

the

thermal

expansion

of

piping

and the support

does

not

produce

any

stress and/or strains

in

the valve.

ln

such situations

a

spring

support is recommended.

The

discharge

piping

should

be

designed

and

constructed

to allow

vessel

expansion as

well

as

expansion

of

the

discharge

plpe

itseif

without

transm

tting any

undue

stresses

or

strains

on the valve. Care should

be

taken

parlicularly

when

discharge

lines

are

longer.

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10.7.6

14.7.7

10.7.8

10.7.9

1

0.7,10

Proper

consideration

should

be

given

to

discharge

pipe

movement

resulting

from

wind loads.

A continuar

oscillat¡on

of the

oislnarge piping

* y

g*n*rutã

stresses

leading

to

distortion

of

the

valve

body

and

as

a iesulithe

mãvement

of the internal

parts

may lead

to

leakage and malfunctioning.

Where

possible

the

drains

should

be

piped

away

to

prevent

the

collection

of

condensate

or

corrosive

liquid

in

the

valve

body,-

The

drainage piping

should

also

be supported

at

appropriate

locations.

when

wo

or

more valves

discharge

piping

is

connected

to

a

comrnon

header,

then

tl-e

built-up

back

pressure

resulting

from

the

opening

of

one

(or

more)

valve(s)

may

cause

a

superimposed

back

pressure

in

the remaining

valveá

connected

to

the same

header.

This

back

pressure

will

increase

the set

pressu'e

of the

remaining

valves

by the

amount

of

the

back

pressure,

unless

the bonnet

is

vented.

when

such

conditions

are

prevailing,

then

bellows

type

valve

is

recommended,

(Also

see clause g.2

of this Rp)

wrr¡cn

also

require

a

smaller

size

manifold.

The

Manufacturer

should

also

be consulted

in

such

situations

for

appropriate

recommendations.

The outlet

pipe

support

should

be appropriately

designed

and

located

in

order

to

preclude

or

minimize

the

reaction

forces

due to discharge

of the

pRV

that

may

generate

critical

dynamic

thrust.

The

amount

of

reaction

force

F

(due

to

gas/vapor

or

two

phase

discharge

in

a critical

steady-state

condition)

on

inlet

piping

due

to

open discharge

may be

computed

using

the formulae

given

below.

tt should

be

noted

that

the reaction

force

F

is

directly

proportional

to

discharge

area

A ,

rnass

flow

rate

of

vapours

w ,

static

pressure

at

discharge

p

and

ratio

of

specific

heats

(c/c,)

etc. (see

Figure-6 of

Appendix-5

of

this Rp).

For

additionat

details

refer

tc

API 520 Part

ll.

w

z

*

,T

o

ú

,i¡

'.)

qûÞ)

7/25/2019 KOC-MP-027 part 2


DOC.

NO.

K0C-ndP-027

PART

2

Page

25

of

64

REV.

f

10.7.1

1

The

following

equations

may

be

used

to calculate

the

amount

of

reaction

force

F

due to

gas/vapor

and

two

phase

discharge

in

a critical

and

steady-state

condition.

FOR

qAS

/-yAPOR

gJSCfrÁRGÊ:

W

KT

+

(AP)

366

(r+1)M

KT

[

=

129W

(k+1)M

FOR ÏWO-PHæE

ÐTSCHARGË

w2

{tJS

LJnits}

{Sf

imetric

Units}

+

A

(Pu-

Pu)

{uS

units}

+

(AP)

X

(1 -x)

F

+

2,898

Ëi0

6

A

Ps Pt

F

W2

-il

--t

¡

)

x(i

+

Ps

Pr

A

+

*--

(Pu-

P

)

lsumetric

units¡

1 000

2.96

A

Where

F

\r'V

T

fvl

A

R

F

Pr

Pt

X

F

Fä

Reaction Force,

Newton

(lbf)

Vapour

Flow,

kg/s

(lbm/hr)

Temperature

at outlet,

oK

(oR)

Molecular

Weight

of fluid

Area

of

Cross-bection at outlet,

mm21in2¡

(Cy'Ç,j;

Ratio

of Specific

heats

Static

Pressure

at Dischargq,

barg

(psig)

Vapor

density,

Kgtm'

(lbmift)

Liquid

density, Kg/m'

(lbmlft')

Weight

fraction

at exit

Absolute

pressure

at

exit,

kPa

(psia)

Absolute

ambient

pressure,

kPa

(psia)

d1¡9u-

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xt.

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PÂRT

?

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26

of 64

REV.

I

+

o

E

to

10.8

10.8.1

10.8

2

10,8.3

10,8

4

10.8.5

10.8.6

10.8.7

10.8.8

PRD:_D

rai n Piping

Requirements_

The

discharge

of

PRV

to

atmosphere

must be

drained

properly

to

prevent

the

accumulation

of

liquids

on the

downstream

side

of

the

pressure relief device

(See

Figure-1

of

Appendix-5

of

this

RP).

For

additionat

Oåtaits

refer

to

Apt s20

Part

ll.

The

outlet

piping

in

closed

systems

should

be

self

drained

to

a safe

liquid

disposol point

so

as

to

elirninate

the

need

for

a

physical

drain.

Approp:iate

drain

piping

should

be

provided

when

the PRV

location

is

such

that

liquid

nr:ay

accumulate

in

the

discharge

piping

that is

not

self

draining.

ln

this

situation

the

drain

piping

should

be installed

on

the

discharge piping

or

hooked

to

the

drain

point

if

provided

in

the

body

of

pressure

relief

valve.

The

rupture disk

is

a differential pressure

device

therefore

care

must

be

taken

to ensttre

that

the

disk rupture pressure

is

not

elevated

due

to

accumulation

of

fluìds

c.n the

vent

(atmospheric)

side

of

the

rupture

disk.

It should

be ensured

that

the

rupture

disk

discharge

line

is

clear

and

free

from

rain

water or

other fluids

that

could

cause

the

rupture

disk

to

activate

above

its

marked

burst

pressure,

Th-e

drain

piping

must

be

installed

in

such

a

way

that it does

not

adversely

affect

tre

PRV

performance,

The

low-point

drain

in

an open ended relief line

shall

be

at least

6

rnm (1i4

in,).

10.8.9 The

drain

piping

should be

installed

such

that

all

flammable,

toxic,

or

corrosive

fluids

are

piped

to an

appropriate

and

safe

location.

10,8

10

When

ttre

drain

piping

terminates

at

the

grade

with a

drain

valve

at the end,

it

should be

ensured

that

an appropriate

sight

glass

is

provided

to

allow

operating

personnel

to

observe

whether

or not

any liquid

is

accumulating

in

the drain

piping.

10.9

PRD:

Bonnet

and Pilot

Vent Pipjno

Requirements.

Appropriate

venting

of

bonnets

and

pilots

in balanced

bellows,

pilot-operated

and

others

types

of

PRV is

essential

in

order

to

ensure

proper

and

safe

operati,ln of

Pressure

Relief

Valve,

For

additional

details

refer

to

API

520

Part

ll.

(Also

refer

Figure-2

of

Appendix-S of this

RP),

*

î,

)

{ lþtÒ

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?

Page

27

of

64

REV.

1

ER

11

.1

11.2

11.3

11.4

{1.0

PRD: ISOLATION

VALVE

AND

ÇAR-SEAL.REQU|REIi.ENTS

The

isolation block

valves

shall be

used to isolate

a PRV

from

the

pressure

vessel for the

purpose of

maintenance or replacement.

The block valves

are also used

to

protect

the operation

of

PRV,

and

therefore

the block

valves

shoufd

be

fitted

with Car-Seals

to ensure

that the valve

has

not

been

operated or

handled

inadvertently

or otherwise,

The

isolation block valves

should therefore be

carefully

installed

and

administratively

controlled

to achieve

maxímum

safety

of

the system,

plant

and

the facility.

All

isolation

valves

installed

on

pressure-relíef

system shall meet the minimum

requirements

as described

below;

a)

The isolation

block

valves

shall

be

full

bore

and

roddable type

b) The minimum flow area of

the

isolation

valve

shall

be

equal

to

or

greater

tl an the

inlet

area

of

the

pressure-relief

valve.

c) T{e

isolation

valves

used shall be suitable

for

the

seruice

classification

d)

The

isolation

valves

shall

have

the

capability

of

being

locked

or

car

sealed open.

e) lt

is

recommended to

use block valve

for

isolation

purposes

on

pressure

vessels

and other

pressurized

systems.

However,

gate valve may

be

used

for

isolation

provided

they

are

properly

installed

with

stems

oriented

horizontally

or if

this

is

not

feasible

then

the

stem

should

be

oriented

downward

to

a

maximum of 45

degrees

from

the

horizontal

to

keep the

gate

from

falling

off

and

blocking

the

passage

of

flow.

0

The isolatìon

valves

recommended

for atmospheric and

low

pressure

storage

tanks

should

be

butterfly

type.

(Also

see

API

RP 2000).

g)

A

bleed

valve

shalf

be installed

on

isolation

block

valve

to

enable

the

s)fstem

to be safely

depressurized

andiar

drained

prlor

to

dismantling

of

PIV

for overhaul,

maintenance,

or

replacement.

h)

lt should

be

ensured that

the sequencing

of

interlocking

system between

iniet

and

outlet

isolation

valve

is

fool-proof.

i)

The

isolatìon

valve

should

be

painted

with

special color

or

otherwise

provided

any

other

identification

after

installation.

j)

Tlre

isolation

valve

should

be opened

gradLrally

to help

prevent

sudden

and

undesired

pressure

and

to

avoid

fluid momentum

from

pushing

the

valve

seat

rapidlY.

z

o

ú

*

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\----

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DOC.

NO.

KOC-MP-027

PART

â

Page

28 of

64

REV,

1

k)

l'he

car-seal

should

be

strong

enough

to

resist

any

ordinary

mechanícal

shock or

blow.

l)

The

car-seal

shall not

be

abfe

to

be

removed,

when

installed Ín

place

and locked open,

physically

and intentionally.

m) The

car-seal

shall

not

be

able

to

be

cut

or

removed,

when instailed

in

place

and

locked

open,

except by

wire cutters

or

strong

or

forceful

hammering.

n)

Fefer

to

Figure-9,

Figure-11,

Figure-13,

and Figure-16

of

Appendix-S

of

this RP

showing

typical

arangement

of isolation

valves.

BD:_PYV

FoR

ATMOSPHERIC

AND

LOW-PRESSURE

$TORAGE

TAl,tKS

The

Pressure

Vacuum Valve for

atmospheric

and low

pressure

tanks

shall

be

in

accordance

with API

Std,

2000.

The

Pr-'ssure

Vacuum Valve

installed

on low

pressures

storage

tanks shall

be

sized

and

set

such

that

it

shall

not

allow

the tank

internal

pressure

to

exceed

its

maximum

design

pressure

limit under normaloperating

conditions.

The

PW

intended

for use

on

atmospheric

and

low

pressure

tanks shall be

spring-loaded

type.

The

PW

intended to

be

installed

on

atmospheric

and

low

pressure

tanks

shall

be

flanged

type.

The

type,

minimum

ratings,

and

class

of

the

inlet

/outtet

flanges

of

the

spring-

loaded flanged

type PW

shall

be

ASME

B

16.5, RF,

150

ratings,

and

the

class

s¡all

comply with tank

service and operating

conditions

and KOC Piping

Material

Classes, unless

otherwise

required

by

KOC.

Normal

venting may

be

accomplished

with

or

without

a flame-arresting device

or as

required

by

KOC.

The

Relief devices

equipped

with a

weight

and lever

arrangement

shall

not be

used.

The

PtÂ/ shall

be

designed

such

that

in

the

event of

failure of any

of

its

essential

parts,

the

PW

shall never

fail

to

protect

the

tank it

is installed

on.

The

M¡nufacturer

/

Contractor

before

installation

of

PW

on the

tank

shalf

ensure

that

the

requirements

of

a

frangible

roof-to-shell attachment

of the

tank, as

specified

in

AFI

650, are

strictly

followed and met.

12.9 Also

re;er

to Clause

8.4

of KOC-MP-027

Part l

12.t

12.1

122

12.3

12.4

12.5

12.6

12.7

12.8

0-

lni

7/25/2019 KOC-MP-027 part 2


't

r)

DOC.

NO.

KOC-MP.O27 PART

2

Pago

29

of

64

REV,

,|

E

13.3

13.4

13.0 PRD: IHERMAL.RELIEF

VALVE

13,1 The

thermal relief valve

shall

be

installed

on

all

such

sections

of

the

pipeline

carrying

liquid

hydrocarbons,

wherein

the

liquid

is

completely

btocked

or

trapped,

and

is

subject

to

expansion

due

to

rise

in environment

temperature,

and

as

a

result

the

internal

pressure

rises

that may

exceed

the

maximum

allowable operating

pressure

of

the system.

13.2

This

thermal

relief valve shall

be

in

accordance

with API RP

521

The

thermal

relief valve

shall be

instâlled

in

the

following

conditions,

unless

othen¡vise

required by

KOC:

a) On each

section

of

the

cross-country

pipelines

between

main

block-

valves,

when

the

above

ground

length

of

that

pipe

exceeds

10

of

the

total length

of

that section.

b)

On

each

section

of

above

grade plant

piping

carrying

liquid

which

is

blocked-in or trapped

by tight closing

valves

and

blinds.

Cn

the

inlet

píping

in

the

heat exchanger

in

which

the

liquid

is

blocked

and

heated between

the

block

valves.

d)

3n

section

of

piping

which

lies

between the storage

tanks,

or

in

the

iank farm,

in

which the trapped liquid expands between the block

vafves.

The

set

pressure

of

the

thermal

relief valve

shall not exceed

110

of

the

maximum

allowable operating

pressure

at

the

maximum

temperature with

consideration

to

pipe

hoop stress,

combined stress,

flange

ratings.

and

any

other weakest

component

of

the system.

13

5

The

location

of

the

thermal

relief

valve

on

sect¡ons

of

cross country

pipeline

shall

tre

selected by

KOC

based

on

accessibility.

valve

safety,

and

parameters

The thermal

relief valves

which

are

not

located

within

a

fenced area shall

be

provided

with suitable

cover

to

prevent

tampering or damage.

The

outlet

of

thermal

relief

valve

ìnside

a

plant

area handling

hydrocarbons

or

toxic

liquids

shall

be

piped

to

a closed

piping

system.

The

ouget

of

thermal

relief

valve

installed

on the

pipelines,

which

releases

hydrocarbons

shall

discharge

at

the

grade

or

as

required

by

KOC.

For

additional

details

refer

to

Clause

8.5 of

KOC-MP-027

Parl1.

13.6

13.7

13

8

13

9

*

o

ú

)

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PART

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30

of

64

REV

1

ER

o

14.0

14.1

14.2

143

14.4

14.5

146

15.0

15.1

1

5.1

.1

15.1,2

15,1

3

15.1.4

15.1.5

PRD:

HANDLING

AND

STORAGE

The

ínternal

parts

of

a

pressure

relief

valves

are

precision

machined

and

fitted

closely

and

securely

to

maintain

perfect

atign;eni.-'

Rougn

handling

may

damage

the seats

or

cause

misalignment

of

ihese

parts

to

incur

leakage

or

erratic

operation.

It

is

recommended

that

the

pressure

relief

valves

should

þe

handled

carefully

and

delicately.

Necessary

care

should

be

taken,

*rruÀ

Þnv

are

intended

to

be

stored

such

that the

protective

end

covering

shourd

not

be

removed

and

be

left

intact

until

installation.

Additicnally

it

is

recommended

to

store

all

pressure

relief

devices

indoors

in

a

clean

and

dry environment

and

on

pellets.

lf

this

is

not

possible,

then the

valves

must

be

at

least

protected

with

a

suitable

covering

in

order

to

prevent

ingress

of

dust,

dirt,

water

or

moisture,

foreign

material,

and

crawling

bugs

/

insects.

All

pressure

relief

devices

should

be

handled

carefully

and

should

not be

subjecled

to

shocks

which

may

render

considerabre

internar

damage

or

misalignment

of

parts

or affect

the valve

seat

tightness

adversely.

Fol

requirements

and

guidelines

regardrng

in-house

inspection

and

maintenance

of

pressure

relief

devices

refãr

to

Àppendix-2

of this

Rp.

rNsPqcr¡o¡¡

Al¡J)

rEsÏNq

Press.ure

Relief

Valve

ÍPRV)

The

Contractor

should

check

visually

the condition

of

the

pressure

Relief

Valves

before installation,

Consult

the

Manufacturer's

instructions

manual

for

details

relating

to

any

specific

pressure

relief

valve.

The

Contractor

shall

ensure

that all

protective

material

on

the

valve

flanges

and

an'¡ extraneous

materials

inside

the

valve

body

and

nozzle

are

compleiely

removed.

The ccntractor

should

check and

ensure

that

the

bonnet shipping

plugs

have

been

removed

from

balanced pressure-relief

,¡alves

prior to installation,

The

interior

of the

pressure

relief valve

must be

thoroughly

cleaned

in order to

prevent

any

foreign

material

that

may

damage

the

seats

during

operation

or

othenvise

render

the

valve

to

malfunction if

trapped

somewhere

between

the

seats during operation,

All

PR\/

should be

thoroughly

and

accurately

tested

before installation

to

confirm

their

set

pressure.

t'

o

ú

*

\'

)

l^l

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4j

)

DOC,

NO.

KOC.F*P-oz?

PART

2

Page

31

of64

RE\¡

I

R

15.1

6

15.1.7

15.2

15

2.1

15.2.2

15.2,3

15.2.4

15.2.5

15.3

15.3.1

15 3,2

15,3,3

Koc

rrocedure

for

testing

and

handling

pressure

Relief

Devices

(safety

valves,

safety

Relief

Valves,

and

pressuie

vacuum

valves)

requires

that

all

such

vafves

be assigned

Z-Number

and

tested

before

installation.

Also

Koc

requires

that

ail

such

varves

which have

been

,to*J

in

excess

of

three

month;

shall

be

reset

prior

to

installation

at

the

relevant

equipment.

The

Z_

Numbers

are

normaily

assigned

in

riaise

with

Koc

Centra'r

workshop

anã

lnspection

&

Corrosion

Teams.

The

testing

of

pRV

shall

be

subject

to

validation

during

shop

testing

and

before

installation.

This

shall

consist

of

three

testing

in

seiies.

rrre

pnri

musi

activate

-at

the

set

pressure

on

each

test.

At

all

threã

testing,

if

the

activation

is

successful

the

PRV

is

then

Validated.

lf

any

of

the

test fails,

all

three

tesi

should

be repeated

again

after

appropriate

adjustment.

RuptHre,.DisF

The

ccntractor

should

ensure

that

all

rupture

disks

have

been

thoroughly

inspecled

before

the

installation

according

to the

Manufacturer's

instruction

manual.

The

Contractor

shall

also

check

that

seating

surfaces

of the

rupture

disks

holder

s

perfectly

clean,

smooth

and

undamaged,

The

rupture

disk

should

be

visualty

checked

for

any

physical

damage

to the

seating

surfaces

or

the

pre-bulged

disk

area.

ïhe

c¡ntractor

should

never

use any

rupture

disk

with

seating

surface

damaged or dented.

The

contractor

shall

apply

the

proper

instailation

technique

and

torquing

procedrtre

as recommended

by the rupture

disk

Manufacturer.

lnspection

and

Cleanino

of

9ystem

befo.re

pRV

lnstallatioq

The

Ccntractor

shall check

and

ensure

that

the system

on

which

the

pressure

relief

valves

are

tested and

finally

installed

is

thoroughly

cleaned and

free

of

any

foreign

material

in

order

to

prevent

the valve

from

contaminatìon

that may

cause

damage

to

the

valve

seat

or

render

ìt

to malfunction

if

foreign

material

is

trappec

somewhere

in

the

seat.

ln

particular

all

new

systems on

which

pressure

relief

valve

is intended

to be

installed shall

be checked

and

cleaned

thoroughly

so

that

they

do

not

contain

any

welding

beads,

pipe

scale,

debris, or

other objects

that may

inadvertently

be trapoed during

construction

and subsequently

damage

the

seating surface

of

the

valve

during

operation,

All

pressure

relieving devices

should

be removed

or

isolated

before

hydrotesting

or

pneumatic

pressure

testing of

the system either

by blanking or

closing

of

the isolation

vâlve.

&

r

o

ú

z

*

o

ì

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ír,-'

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16.0

16_1

16.1.1

16.1 .2

16

1.3

16.2

16,2,

1

16.2.2

17.0

18.0

when

an isolation

valve

is

intended

to be used

for

such

purpose,

the

flanges

between

the isolation

valve

and

the

pressure

relief

devicå

srroulo

be

wedied

open or

a

bleed

valve

provided

so

that

an

inadvertent

leaking

through

*the

isolatior

valve

does

not damage the pressure

relíef

device.

D,OçUMENTATTON

Gs*,gra

All

correspondence,

instructions,

Data

sheets,

drawings,

calculation

or

any

other

rvritten

information

shall

be

in English

languaje.

ln

case

of

dual

langua¡¡es,

one

language

shall

be

English,

All

dimensions,

units

of

measurement, physical

constants

etc.

shall be

in

st

units,

unless

othen¡vise

specified. (pipe

sizes

shall

be

shor,vn

in inches),

ln

addition

to

hard

copies,

all

final

documents

such

as

specifications,

Data

Sheets

and

drawings

shall

be

provided

in

approved

electronic

software

formats (Latest

versions

of

Microsoft

word,

Excel,

and

AutocAD).

calculations

shafl

be

submitted

in

widely irsed

software

forms

agreed

upon

by

KOC.

DeliveJaþles

Test

Certificates

and

"as-built"

drawings

and Data

Sheets

of equipment

and its

parts,

appurtenances,

and rnaterials

as covered

by

this

Rp

shall

be

submitted

to

KOC

for

review

and

approval before

packing

and

shipment,

ïhe

ManufacturerA/endor

shall

submit

to

Koc

for

review

and

approval

the

Manufâcturer's

Record

Book (MRB)

with

all

the

test certificates,

and

equipment

Data

sheets

(with

blanks

filled

out),

for

the

equipment

and

materials

supplied

in

accordance

with this

Rp.

sPAgE

P_åRTS

$

MAt¡{rENll \rcE

pArA

The

crrntractor

or

Packager

shall

compry

with

the

requirements

of

,,Koc

Standard

for Spare

Parts and

Maintenance

Data" (KOC-G-009).

APPFNDTCES

ì

,n¡[ò0,-

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)

DOC.

N0.

KOC,MP-027

FÅnT

2

of

64

RÊ\'.

T

E

*

o

ú

&

PPENDIX.l

DATA

SHEELjSPRTNG-OADED

PRESSURE

RE _tEF VALVE

(For

Adclit¡onûl

dete;t¡ls

refer

to API 520

Psrt

l)

Kuwaít

Oil

Company

shqet

Nü.

*f

ruOfE;

KOC tû

mark

/

indicat¿

items

to

be

fitled

in by

the Manufacturer/Vendor

u¿ith

an

Asterisk

('),

)

SPRING-LOADED

PRESSURE

RELIEF

VALVE

PECIFICATION SHEET

N*.

oh

Nr:.

naiq

S.eviç*d

8y

ûÊN€,RÁL 8å515 0F

SELECTTOÍ{

5. Sl i1rf¡

-*-1.

-

l

I

Èaìl

Y€E

.

VA¡.VË

DçSIüil¡

å

È. s

n¡

i)

MATilFTiÅL5

i.:ùr

'JeiltiÕü¡li

I

ììe,llnws I

I fì.rl¿nr¡rd

Èirt*t I

I

l$

ßûnJ1el:

fÊiìr

iit¡o:¿l*¡

li¡sk

f,

f{ù:Îlr

lvl}*ì

i

rrll I

ITi'm¡

I I

I

:{). ìl*$ili{nr seât:

lì

in¿nllCl*ç*ldll

2ì.

Curde:

1¿

LI

.11 Ìt)-lel$ìal 2¿,

ìt

:t

74

$e llt-:il¡

s;

CONNËCTION

8al*nced F

{rftñì

3ñ.

fii¡nr

¡:h,

hl.,\

:å

MÈ

ù I

¡i/ì5ü15.t5$: Yes

lrl

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I l

'

{

àr

'r

5

()l ìcr

I

ì Snircifv:

stavtcË

cÕi¡ÞlTlÔÊ¡5

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Vali.e dfid

i-l¡1rts;

lh/h

r

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s¡r€{ìfi}: Cr¡rdiïv:

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l-illingLever: Pi¿lnl

lPackcdI

jNcrr¡]l

I

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3û.

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0rilìte

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5{

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PILOT.OP

ERATEO

PRËSSURE

RËLIEF

VALVE

SPECIFICATIC.N

SHEET

of

r ¡

l}41 N

Lr

J*Lr

ño.

Lì¡u

Rerìrr.d

By

GENE]ìAL

tAsls c)F sË[EcrlOfJ

ì

ilem

l*lunrbsr:

5.

lCode:

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I Yc

rr

Nc

l.

Ïlg l'.lrinrþc:'t:

1

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ç.{lt

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526'

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¡\:

.t

.l*i'nåxr

ü*rqrrlr*d:

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tlsk

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VÂLVE

DESIGN

I.IATERIALS.

MÁIN VALVF

g

::lii¡rr Tytx'

F,gìg*

I I

ûr"T*ìr';ilx

I

frj{kÞrs

I

I

rû

rlt¡nrber

nf

F¡lcl*:

?

I

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fistrçr.

II

f-ì¡\)l Typü. l-È::*,lrg

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ûlher

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SERVI(E

(:OI'¡DIIIONs

ll({-:t55ftRtF-\

43 Firri:J

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t;lnl{,.:

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l-ri :r.

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i

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t¡ì

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r

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tsç

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48 FrÌl Piti¡ìl¡\uù

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40

L{t""'nhr.l¡r:

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f

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5ð

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in

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Ë2

57

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l

APPËNDIX.1

nÄTlr

ç.

HËÊ

T

'g)

L

nT-rìE'trf)

ATED

P

ptrqc¡

lÞË Ìrtrt

IEF V

Àr

\/tr

Kuwait Oil

Company

(For

A¿lditi<tnttl

detttits

te.f(.r

ro

API

520

part

t)

NOfE:

i(OC to mqrk/

indicate items

to

be

filled

in hy the ManufttcturerNe.ndor v,,ith

ün

Asterìsk

(')

Ø

1..iiìrrl

o

ú

t)

*

z

{Wùv'

7/25/2019 KOC-MP-027 part 2


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FART

2

F*ge

35

of

64

REV.1

ER

o

AP

Dtx-1

Ø

SHE

TURE DIS

Kuwait Oil

Campany

(For

Additionql

det¿ils

re.fe.r

to

Af

t

SZA

pã/t

t)

RUPTURE

TISK

DEVICE

SPECIFICATION

SHEET

t

L-'l

No

Þôle

?,Èvlsed

1v

t F€Nì

FfuM$ET

$efvl{ë.

Ltnù,

Õr Eq$rit.

N0"

2

Têq Èh¡mh€f .t

Oesrçn Cilde cr

.3lr¡ndðrd

Setv

eun

5 Vessel

or

Piflrlq

l\lÅWP

Ftuid

7

Ph{d St.île

(iì¡tiðtnfl

ruplure}

I

Fluid Slðle

frellevi }J

rÕndiltons)

llëSrlrt{l

Rellev'nt¡,i:irparrty

tü

$+löhci.ìlü¡

lvÊ¡ilttl c$

Speriliç

tr,3vtty

il

VicÈosl$"

st

RnNevirq

I ¿n$.*¡¿lur*l

tìofi

pftitisitr

i$ty f

,;lülrJr

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l.Jçml¡ll

il|.ü$nrjtï

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re

tû

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lnlet vilçuurn

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(yësho)

?3

nËf

LoÈat$d û*t$r¡5Ìreanì

ol Våfu*

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25.

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Prp€ Size

27 F,ânce

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ar

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49

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å

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{y/n)

E

Àlrtl ð0 o$efåtilü ¡1ålro

3å JÊ1{kscfÈrv3 ¡vÉå/nðì SI

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n

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¡ra[

52 RrfDlule

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ft lålénäls

4Û.

r)lher

å3

idi¡nuf;lcturef s

tJå â

NOIE; KO{

to

nwrk

/

índicate

items

to

be

filled

in by

the

fvlanufarturer¡VenCor

vvith

an

/¡sf€ris/i

l)

Ø

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)

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APPENDIX.2

PRD: INHOUSE

ION

AND MAINTENANCE

REQUIREMENTS

1.0 The

inspection and

maintenance

of

Pressure

Relieving Devices

shall

be done

in

accordance

with

API

RP 576. Clauses

described below

are

in

addition

to

API

RP

576.

20 As

a regular and

routine

maintenance,

every

PRV

should

be dismantled

and

remo'.¡ed for checking, overhaul,

maintenance,

and

resetting

at

KOC

Workshop facilities after

a

specific

period

of

time

(after

every

two

years

or

less) whether

the

PRV

are functioning

well

or not,

3.0

Failure

or

inability

of

pressure-relìeving

devices

to

function

properly

due

to

some reason when required

to

release

excess

pressure

shall

result

in the

overpressure

in

the

pressure vessels,

or

process equipments,

leading

to

catastrophic damage and

breakdown

of

that equipment

or

system on

which

they

are

installed.

4,0 Therefore

all

PRV

after

installation should be

looked

after

regularly and

kept

and rraintained in

perfect

operating condition

to

provide

safety

and

protection

to

personnel

and equipment.

5.0

Some

pressure-relieve

valves have set

pressures

that

may

exceed

their

outlet

flange

rating.

lf

isolation block valves

are installed

on the

outlet

side of

these PRV, make sure that the

block valve

on

inlet

side of

PRV

must

be

closed

fírst

before closing

the

outlet

valve.

60 The

pressure

relief

vafve

body

must

be vented

immediately after the

outlet

isolation

block

valve

is

closed,

This

prevents

high

pressures

from

the

pressure

relief valve

inlet from

possibly

over-pressuring the

pressure

relief

valve body.

7.0

Similar

precaution

must

be exercised when installìng

a blind in the

pressure

relief valve

outlet.

Maintenance

staff

should also consider

installation

of a

drain

1bÍeed

valves between

the inlet

and

outlet block

valves

and

the

pressure

relief valve.

8,0

Before disconnecting pressure-relieving devices,

the

connected piping

and

block

valves

shall be checked

to

ensure

that they

are

sufficiently

supported.

After reinstalling

pressure

relief

valves,

the related

piping

should be

checked

to ensure

that

it

is not

imposing

loads that shall cause

problems

with

the

pressure

relief

valve

body

such

as

distortion

leading to

in-service

leakage.

9.0 Some

PRV

may trap

hazardous

or

toxic

service

fluid

in bonnet cavities or

dome

cavities.

Special

cãre

and

caution

should

be taken

during

deco¡ltamination

to

minimize

exposure

of

personnel

to such

fluids.

*

qÌ,^>cv.-

7/25/2019 KOC-MP-027 part 2


\

)

DOC.

NO.

KOC.MP.Oz?

FART

2

Fage

37

of 6{

REV.

1

ER

APPENDIX.3

PRD: TYPES. FUNCTIONAL,

CI{AFAGTERIST|CS.

åNp

USES

I

Sprinftl=qgjgd

Eressure

Retigf

Vatve

(pRV)

a)

Conrrentional

Type

for

Vapour

Service

Applications

The

conventional pressure

relief

valve

(PRV)

should

be self-actuated

spring-loaded

pressure

relief valve

which

should

be designed

to open

at a

predetermined

pressure

and

should

protect

a

vessel

or equipment

or

system

fronr

excess

pressure

by

removing

or

relieving

the fluid

from

the

vesSel,

equipment

of

System

gac

liisure-l

oJ ,4pperrtlír-4

of

this

Rt,¡.

The

conventional

PRV

are

intended

generally

for

applications

where

excessive

variabfe

or

built

up back

pressure

is

not

present

in the

system

into

which

the

valve

discharges since

the operational

characteristics

ii.e.

opening

pressure,

closing

pressure,

and

relieving

capacity)

are direcgy

affected

by changes

of the

back

pressure

on the

valve.

b) Con,rentional

Type

for

Liquid Service

Applications

The

spring-loaded

pressure

relief

valve

intended for

liquid service

does not

pop-up

in

the

same

manner

as

the

vapor

service

valve

since

the

expansive

forces

produced

by

vapor

are

not

present

in

liquid flor,v,

The

spring

loaded

PRV

intended for

liquid service as

such

relies

on

reactive

forces to

achieve

the

lift

for

release

of

liquid.

c)

Balanced

PRV

The

balanced

pressure

relief valve

should

be

designed

as

spring-loaded

pressure

relief

valve

that

should

incorporate

a bellow or

some

other

means

of balancing the

valve disc to

minimìze

the effects

of

back

pressure

on

the

performance

characteristics

of

the

vafve

lVe

ttigurc-)cn<{

Figurc--t

o./ Åp¡x:ndit-t

<tl

rhis

RP).

A

balanced

PRV

incorporates

bellows

by

means

of

which

the

effects

of

a

back

pressure

on

the

operational characteristics

i.e.

opening

pressure,

closing pressure,

and

relievíng

capacity

are either

minimized

or

precluded.

The

þellows

of a

PRV

during

operation

balances or

eliminates

the effects

of

variable

or

built

up back

pressure

that may

exist

in the

system

into

which

the PRV

discharges.

ú

*

q,ñN-

7/25/2019 KOC-MP-027 part 2


DOc.

N0.

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pÀRT

2

Fage

38

of

64

REV.

1

E

R

APP

DIX-3

(('ontinuerJ)

2

Pi

lot-Operated

Pressufe

Relief

Valve

The

pilot-operated

pressure

relief

valve

consists

of

the

main

valve

which

normally

encloses

a

floating

unbalanced

piston

assembly

and

an

external

pilot.

The

Pilot-operated

pRV

however

is

not

ru"o**"nded

for

use,

Also

fefer

to

ClauSe

8,1

of this

RP.

i .'or¿lctaìl.t

¡¡lpil<¡t-ottemred

Vah,e,

relùr

t<t

f:i.¿ut.t:--\

t>1.

Á

pper

dit-,1

i tl' t

h

is

lt l,

).

3

Ruotr¡re

Ðisk

{No

stng

Pressure

Relief

Dev

ice)

4

a)

'fhe

rupture

disk is

a

non-reclosing

type

of

pressr.tre

relief

device.

lt

acts

promptly

to

overpressure conditions

when installed

to

protect

pressure

vessels,

equipment

and

other

pressure

containing

systems.

(st<,[-i;¡urr,-ú,

i

:

i

"q

u r c-

/,

tt

n

I

I

:

i¡lure-

I t

¡J',4

lye

n

d ix

-.1

ö

/'

t

h

i.s

R

p

).

b) The

rupture

disk

alone

shall

not be used.

However

if required

may

be

used

in

combination

with

pRV

(See

Clause

10.2

of

this Rp),

PRvl

TåELF

FoR-S-ElEcÏoN

oF

oRtFtcE

StzE

TABL.E-1:

Standa

rd

Effective

e

Areas

) and

Pesiqnatiqq-L,etter

Sr,

No.

ÐESIGNATION

LETTER

EFFECTIVE

CIRIFICE

AREA

{ln'.}

1

D

0.1 10

?

Ë

0,1

96

3

F

0,307

0.503

G

tl

LI

tt

û.785

J

1.2*7

1,838

K

I

L

2.8S3

ü

M

3.Ðt

1ü

N

P

4.34

11

6.38

';

a

11.0s

1ô.00

26.ût

r'l

R

14

T

w

z

*

o

t-

qaN-

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DCIC"

NO. KÖC-MF.Oz? PART

2

Page

39 of 64

REV.

T

R

@

*

,r

o

o

ú

z

APPENDIX.4

PRD:

TYPES.

DEStGfrlåND GENFRAL DETAtLS

c{F

Sl'lrn

t$nl¡ìdl,rl

Àþr åï¡

strtr

ßnÌl*l

Sprh{

liûl¡¡ìg

6uil${s

&lþrr{ü{

ntrg

tÀn*

NËd{¡

Figure-1

ttsc

Vüìrt

it¡l${iiidi

Conventionål

Pressure

Relíef

Valve

with a

Single

,Adjusting

Ring

for

Blowdown

Control

4õ

\

v

7/25/2019 KOC-MP-027 part 2


-->

t

DOC.

t{O.

KOC-lrlP-0?7

PART

f

Page

40

of

64

REV. 1

z

w

r

o

ú

o

*

APPENDIX-4

({.)r¡tttinuul}

via,

Sù¡rn

isp'þxld¡)

.{r¡,ã ng tcri¡rd

ÈroflnAl

1ÌÞ{llr{¡

üsIarw

OÈl(

ulin{

sutlce

ÁìrIraìnÈ *r.l

Ëody

¡&fi[r

PRD:

TYPES..

ÞESIGN

AND

GENERAL DETAILS

Vçfi

tuu*lg rr:få

rdm

f:igure-2:

Balanced-Bellows

Pressure

Relief

Valve

4ñ

\

t\¿-

7/25/2019 KOC-MP-027 part 2


APPENDIX-4

{Coutint¡,-

'd)

PRÐ:

TYPES. DESIGN

AND

GENERAL

DETAILS

ü'r$

slùn

{5F¡a¡t*l

,il1¡.1* t¡¡

r,:

lYs

¿ì.sfllt

3ç{}Tt

Fù Íìa("t

gr{ilK

rHd

tlf¡1f.{rgtsJ}

{ìcs:rë

p:tìi

ì"tì'ûll

lulIlf

?t¿j;urltìg tJ¡çl

Brdy

Jt*¿f+È

Figure-3:

Balanced-Bellows

Pressure

Relief Valve

with

an

Auxiliary

Balanced

Piston

--->

t

Þoc.

N0.

Koc-FJtP4e7

PART

2

Page

41 of64

REV.'

E

z

ô

*

o

ú

q'òÕ''

7/25/2019 KOC-MP-027 part 2


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K0c-tirlP-O2?

PART

g

Fage

42

of 6,f FIFV.

T

E

.*

APPENDIX-4

(''

ctnt itruat 1

PRD:

TYPES,

QESIGN

AND

GENERAL DËJAILS

çtp

:ilü\

iTi".v$È

i{tìjJ¡il

11{¡ 1{JèiT

â(s *i

lì3ir$

ßts¡r

*eùlsl :s$"ìr:q

ll;3d

ilqli:

Figure-4:

Conventional

Pressure

Relief

Valve with

Threaded

Connections

@

)

<)

*

o

t-

fi'Ùa--

7/25/2019 KOC-MP-027 part 2


)

)

ÐOC.

NO.

KOC-fi{P42? PART

2

Page

43 af

64

xËv.

{

APPEND¡X4

('uttittucd)

PRD:

TYPFS, DESIGN

AND GENERAL

DETAILS

sd

5{

¡r¡r$*s

tfi ¡ln|ëd

ffs*

S6$rþ

E¡tcrr$f ùþô¡tù*n

â4lålflx,rt

Êl(

sçfrf

$t¡â

Flü r*r*g

Ftd

iùtr¡ljs

/-

(TJûrdSüì

/ IÞ1

v

{Mrd

Êlm

5*ðt

Irfçrul

p¡¡¡r¡r

ff;r.$

bþr

fI+rll*4

Figure-5:

Pop-Action

Pilot-Operated

Valve

(Flowíng-Type)

.l{

,f

o

ú

@

z

a/

*

[u--

7/25/2019 KOC-MP-027 part 2


)

Ð0C"

f.¡O.

KOC-MPdtf

PART 2

Pnge

44

cf

S4

REV.

f

4PPENDIX-4

(C

otttínuert)

CORR€CT

INSTALLANON

$rìÐñ{ìðfs

r

lki$

;¡.1¡I

¡Hr[ç

¡lriS.rlùt"*

üT5k

þ're.oess{nt\ll

{*

¿iU¡ä

iT

l>r8-¡l$è$ìrlty

sdf$lt

s

lrì:{rt-l}.?c

n4]lüù

tlsi(

fì.J{û f

lir{dl

ùrhJ ûi.jlt*f

$û¡*f,ì

liìrlÊô

ifql

+

lÏ.,

Figure-6:

Forward

Acting

Solid

Metal

Rupture

Disk

v

7/25/2019 KOC-MP-027 part 2


b4

Þoc.

ñ¡Õ"

K0C-MP4?7

FART 2

Page

45

of

64

REV.

l

APPEN

DlX-4

((;

rrtr

i

nt rad)

PRD: TYPES.

DESIGN AND

GENERAL DETAILS

CORRECl INSTALLAÎIQN

3¡ni l}{{ñ dltk*t

*r'rù

rìù,hì

Êüpll,fr

ËiÈ

ðsrs¡ëtj"ì- 5¡lþ

ðl¡S6

*f

l¡.f

È

".*ser¡{ìtt

tcJ

òn$

rr5{¡ ìYÞÈ

nrFaL&r

ú$g l¡:.'&ftt

{inÞî

itût *{IilÈl ¡Írüñ*r"i

+

Figure-7:

Fon¡rard

Acting

Scored

Rupture

Disk

E

-------

tf"¿

@

t

o

ú

)

)

)

ø

v

7/25/2019 KOC-MP-027 part 2


DOC.

NO,

KOC,MP-027 PART 2

Page

46 of

64

RËV.1

APPENDIX.4

((.-ontin

ue d)

PRD:

TYPES.

DESIGN

AND

GENFRAL

PETAILS

Prqåturd

g¡r:{

t¡|re

ËdFtr¡{E

d¡s.k de'¡ise

Fr.:'*srelrlr'¡

sr*e har¡ *u¡qhe':{

w¡lh

l{f

ljeri

ûi

¡re

*rlciu$'

rûì

vsût

A

tr

Fígure-8: Rupture

Disk in Combination

w¡th

a

Pressure

Relief Valve

/-,.É-+\r

/

0

0

0

ü0

o

t-

*

¿l^a

N-.

7/25/2019 KOC-MP-027 part 2


V*ssel

DOC.

N0.

KCIC-tutF-027

PåRT

2

Page

47

of

64

RËV.

{

APPENDIX..S

PRD: TYPI

CAL

INSTALL.ATION

NT' PIPING

Pre¡íù{¡Ts

rrli*f

velve

nÕdrr¡ Grðt¡:ì

{sea

Fl{]tr

l}

L${rJrl:tfl1dl.lin

1sr*e

Finte

2)

lVurìlre

r

r;üp

lìì¡ì\¿

ix,

rs{iüfed

LünS

rñ¿jrus

*tr{:,w

::uÈË¡üfì

la

rr. risl

v.,erçhl

ùrri.J

ï* 1ülÌr¡¡¡

lsTc$iì

-

Nruxin*l

nne

t'rn¡n*ler

ã

n$

le.Ëg

ln¡¡ì

vðÞ\t

irìlel

ñritï

N(}il-raßìv$iÀbls

ËrÊÉ$lJrè

lilssÈ.å rì{'il

nkrff:¡ Ti¡}¡r

$

fr*{c$r'rt

ûf

Í)rsr*$,ns

t$ü${

ïals€

*l

Fê.$suI€

Notes:

1

.

For

details

refer to

Clause

10.8

of

this RP for

valve body drain.

2.

Ïhe

low point

drain

should lre

oriented

away

from

PRV, the

structure,

ând operating

area

l=igure-f

Typical

Pressure-Relief Valve

lnstallation:

Atmospheric

(Open)

Discharge

1PC\.

7/25/2019 KOC-MP-027 part 2


APPENDIX-5

(Conlinued)

To

dorad

*ymenr

{:{dnunir$l

PID:

TYPICAL

11:¡SIAI.L ATIOIr¡

AND

ptptN.€

$rñ'sÉ

vtrrl¡r¿F¡Ð

t¡r

Þ&*Qgapr*um

ltlidrañn,

if

tae¡&rrd

i$ô*$þþ¡

Ëkllgd*Hl

*i'LÊ,

itrüqFriñd

roð¡tvflnFmv

Tdt¡år{a

N*rfi*

¡lpmdunrt*r

ns

tættãürûJs*

iÂlÌ$t*e

Vùssel

,)

FOt. NÕ.

K$r{utp-02?

påRT

r

Fage

4û

oft4

REV

I

For

technical

requirements

of bonnet vent

piping

sêe

Clause 10.9 of this

RP

Figure-2: Typical

Pressure-Relíef

Valve

lnstallation

Closed

System

Discharge

I

7/25/2019 KOC-MP-027 part 2


.l

APFENDIX-g

(Continuect)

tlupþre

ñ

dâr,{c€

PRD;

TYPICAI

INSTAI-LAT|9N

A{p

ptptNG

l{dr¡sr

Rüt}l ru

d¡ü*

('

,)

tl€srd

Ðoc.

No.

KôC-fi¡tP.t2T

pART

2

Fage

49

of

64

REV,

I

Figure'3:

Typical

Rupture

Disk Device

lnstallation:

Atmospheric

(Open)

Discharge

\

7/25/2019 KOC-MP-027 part 2


I

)

00c.

lto.

Koc-tr{p-02?

FåRT2

Fage

50

of 6rf

REV.

{

APPENDIX.-5

(Contirtued)

Pr${*r. .¡Oa¡s

lis*rhl

þd.

tr(*ä,

rttcr soürÉ

NOTE;

For

details

see

Clause

10.G.2

of this

Rp

Figure-4:

Typical

Pressure-Relief

valve

Mounted on

process

Line

Yô*d

\

,

7/25/2019 KOC-MP-027 part 2


APPENSIX-5

(Continued)

ù.hå'l 'f, ,ç

PRD: TYPIC3L INSTALLATION

AND PIPING

Pl:it

hìlü¡å¡

lrrú.rrrÞ

rtûÉr{

/')

=ìt

t\tstùl rs{*$l{}

¡¡tg¡rrr

ld 9iç

DOC. NO"

KSC"MP&zT

PART

2

Page

Sl

o{

6¡l

RËV.1

Vesssl

Figure-5:

Typical Pilot-Operated

Pressure-Relief

Valve

lnstallation

U

7/25/2019 KOC-MP-027 part 2


I

r¡oc.

Ho.

Koc-Mp427

PART

2

Page

52

of

64

REV.

.t

APPENDfX-5

(Continued)

F

is{

}.}ô{o

It

^

(rËë

Nðt.j

?t

Lúrrr

ñrrtrilâ

È&lN*

':.ì¡rW

trf,

rb*trt

wr\¡t{

ô.{

afle;lù}fi tf¡-:Èf

l$'ir¡

t'¡{srt

' ¡

NOTES:

1)

The support

should

be

located

as close

as

possible

to the

centreline

of

¡re vent

pipe.

2)

F=Reaction

Force:

A=

Cross-SectionalArea.

(Fordetails

see

Clauses

10.7.10

and

10.7.11 of

this

RP)

Figure-6:

Typical

Pressure-Relief

Vatve

lnstallation

with

Vent

pipe

7/25/2019 KOC-MP-027 part 2


)

noc.

No.

KOC-Mp-027

PART

?

Page

53

of 64

ËEV,

I

z

APPENDIX'S

(Continued)

PRD:

TYP

ICAL

NAN

D PIPING

i::¡i

çt.uçru

låtmt

[Ji*c$t¡¡rl;s

Þ¡uing

I

f

ræ v{¡ll u.

I

tðtfiål€

an{:tmútt*

l:ìi.4)l¡Jr

r] ¡Ji.5k'

dß¡6S

{S8*

l'.lùtq l'

f?f*çÊurs

¡{:3€

rüÊ

mNÐ

thìlÕ

fi

i*¡{ûf{l

*1

tlrÊóil¡r*

{.}li*t

villve

fr{}t

ll

ì}1i$r}r

t

NOTES:

1) The

lnstallation

of

rupture

disk

device

in conrbination

with

PRV

(Also

see

Figure-B

of

Appendix-4 of th¡s

RP)

2) The

space

between

the rupture

disk

and

PRV

must

be

vented

or

provided

v¡ith

a

suitable

Telltale

inCicator.

See

Clauses

10.5.2

and

10,S.3

of

this

Rp.

Figure-7:

Typical

Rupture Disk

Device in

combination

with

Relief

Vatve:

lnlet

Side

lnstallation

*

, l;'.,r

,)

ry,Dv

7/25/2019 KOC-MP-027 part 2


APPENDIX-5

(Cantinued)

PRD:

TYPIÇAL

INÇTALLåTION

AND

PIPING

Í¡ruæ}{lrs

valv*

Avcrúd

p¡x*¡qc

}ltsrsþ

{ree

n¡*}

T

Note:

the

joining

of

process

lateral to inlet

piping

should be

avoided

(See

Clause

10.6.8

of this RP)

rS¡çl

t)-

000. N0.

Koc-i¡F-0zr

pA,RT

2 of ð4

REV T

Figure-8:

Pressure-Relief

Valve

lnlet

Piping

VËßËI

U

7/25/2019 KOC-MP-027 part 2


a'

DOC"

N{r.

KOC{Utp{¡?

pART

2

Page

üð

of64

REV"

1

APPENDIX-5

(Continued)

h{¡tt*,rì

1ilÈaa

*{t

sçd*tll

fxr

mr

ff*r¡r*r **lrg<ç*t

(rtt

¡0eJil6

þr åUiO*ùÇrJ*

dhrtr*¡$l..

*t¡do

l¡

É¡Ôlürat

liarft

rwlr?rd{

Fr¡a{¡r

T drqrtö*

t& öl{}pa

t**a, Ð¡rre

la*

låGr¡àfr

7l

Ts

ü¡ÐrliûFü

er

nÈlwñütr&tÈt

SllÈ¡øl v¡¡tm

lr¡¡l¡l *n

wlÐ

Sodf

{.i

¡lk$ô

3l

8 È.id

i.{trr

r*'

&1ttr

Þ6¡¡ë,r

0f

þclinü rptt

Ë¡

tar.T6¡ra

'.tnryir$

lFêrÌ

f¡þ¡¡o.

tt

r*4fÀal

ie dütr

strFlV

Notes:

1) lsolation

valve

need not

be

necessary on

piping

intended for atmospheric venting /

discl':arge.

)

2)

A

bleed

valve

should

be

provided

at the lowest

point

on

the valve

or

otherwise

on

the

pipe

spool to

help

drain the

condensatelliquid.

3) For

details

refer

to

Clause

11.a

(g)

of

this RP.

Figure-9:

Typical

Pressure-Relief

Device

lnstaflation

with

an lsolation

Valve

\

a

7/25/2019 KOC-MP-027 part 2


APPEND¡X-5

(Continued)

{i¡d* ì¡t

edvnrs

ßqûüßjì

ft

dei$¡0¡

riôù¡'t

ô¡rìIì

tl{WVðìlç

t3.Dtu* S¡Sü

{l}r

.rHd

ûtù)

s

¡krdäÍ

irì tg

'fwåt

t¡+q.¡

råù\*

vråså{L

Figure-10:

Typical

Arrangement:

Twin

pressure-Rerief

Þevices

Each

100

%

Spare

Relieving

Capacity

<t

Ðoc.

No.

KOC-MP427

PART

2

P*ge

56

of

t4

REV.

{

ïi

1øu

7/25/2019 KOC-MP-027 part 2


APPENDIL-g

gontinued)

PRD:

TYPICAL

lNsfALLATtoN

ANp

.plptNg

It)

di*í

i&gnå*l

v{ù*yr

dl¡{Rl;

Èel*¡fiffi

å:{h$ c

{}i€rl

f

, *}Ùt

rff.lh¡ûl

î¿lÀ€

*{¡fgwtfrçü

ç*¡¡fç

a{

¡qÈsg

ûÉsì

l$É

¡k :lir ßt

h*c.'r¡.wc¡l*r

rÈrt¡i

h-,{å

*?

*¿¿ç

llwl

:

þlrrÈÁ

.l

.*"{

ffiG

Notej

For

details

on

lsolation

Valve

and

Car-Seal

refer

to

Clause

'1

1.0 of

this

RP

Figure-î1: TypicalArrangement:

Twin

Pressure

Relief

Valves

lnstalled

with

lsolation

Valves.

Each Pressure-Relief

Valve

lnstalled

has 100%

Spare Relieving

Capacity

It6lêr¡

þiñJ

s¡l$E

T¡t*o¡.

lì¡Èxt

ralr

,r

)

Q---

BûC.

þ¡O.

K0C-MF-027

PART

2

of

64

REV. {

vfrËLt

il

it

ER

4,,O

7/25/2019 KOC-MP-027 part 2


DOC.

t{t.

KÖc-mP{r2?

FåRT

2

Page

$t

of04

RËV.

{

APPENDIX-g

(Contínued)

Iûrtil*Rdåt¡ftì

raå¡fif

yrqsì**t

or

* n6(r.'herfë

dldreegp*yû¿ãilt

lcrçwwrnbt

¡rrxrcl6eo*rxt

nur

¡lryl

3

plrarrrl

ùI *t

FarrÍÍ6

l1¡¡cd

hhcdv*l,r*

Fqrüi Ç

lï{oaû¡rårl

Õf

r¡rûìa röfrvirì0

dçsìnË

Vnsrc¡l

Figure-12:

Alternate

Arrangement:

Tw¡n

pressure-Relief

valves

lnstalled

with Each

100

%

$pare

Relieving

Capacity

E

Cç--

7/25/2019 KOC-MP-027 part 2


DÐC.

NO.

KOC.MP{I27

PART 2

Page

59

of

64

REV.

T

'*

z

o

,aY

E

*

F¡ç¡r¡nfl

lÞs*r $

flÈiål¡-et

iJ$ÈrélÀ

APPENDIX-5

(Continued)

Èe;ery krË

,te¡*¡te

lìt*el

Tave

fsidam*

FRP:

IYPICSL

lNSTALL4TIoN

ANp

ptptNc

ðlq¡x:ixr¡itS¡ry

[

h.aw

Hrxtr.$¡*

fi

itrxx*¿ l*l

r¿*tl

I

fþ&J*r

{ç¡dl

d{eìni.çj

llw c$*

rs¡+{lJ

l'¿l¡*

XX

,î .Å-f -

I*þ

7

Ä

l\

Note:

For

requiremeets

of lsolation

Valve,

refer

to

Clause

11

0 of

this

RP

Figure-13:

TypicalAssembly

of

Flare

Header

Showing

PRV

and Block Valves

0t-

7/25/2019 KOC-MP-027 part 2


ÐOC, l,l0.

KÕC{iP. Z7 PART I

Pago

60

of64

REV, I

APPEND¡X-5

(Continued)

flmÇüs

¡¡u¡ûñ

düçrxs*

PRD: TYPICAL

INSTALLATION

AND

PIPINF

k*ûñþhd.

vdfü

tb0r*or*sn*drc

Pncü

uritþv

ladÉr

*wwt

fr¡úar

ürÇgr¡

tu@ ..ürÉ*S

T*d%

Figure-14:

Typical

Arrangement

PRV

and

lsolation

Block

Valves

lnstalled

on

a

Gompressor

Unit

lsðNicr¡bpûs

t

å ¡

r/

\)

7/25/2019 KOC-MP-027 part 2


J

)

Ðoc.

No.

Koc-MP-oz?

FART

2

Fage

6{

ofß4

REV.

.|

APPENDIX-5

(Continued)

PRD:

-TYPICAL

f

N$TALLåTION

AND

PlPll.¡

Ç

lnlet flenge

lr*sl

$ps

Rotuded entry

ka¡ch ffinnsc¡&m

D

(see

Nole)

Nole:

The

distance

D

should

not

be

less

than

10 times

the

pipe

diameter

frorn

the

device

or

any

equipment

installed

on

the

system that

causes unstable

flow.

Figure-f 5:

Typical

lnstallation

Avoiding

Unstable

Flow

Patterns

at

Fressure-Relief

Valve

lnlet

Flovr

.+

Run

pipe

7/25/2019 KOC-MP-027 part 2


q

DOC.

HO,

KOC{/|P4â7

FART

2

Page

62 of fi4

REV.

I

APPENDIX.S

(Cantinued)

PRD:

TYPICAL

INSTALLATION

AND

PIPING

,a;lftl,sr€ l

r,¡Jge

niï.SSll,ül,fû

ìfl

'{ìp€r¡'ps**n

ål](

{Ì lðtl

}srlsflk{y

FiüU

Shsn

ntFË{*

In

ûl+*r wn

htåd{r

->

S+o* r tr*s sùn¡ld hr{€

it

¡irfl

.¡rea

,ï¡ú

br

ä1 lÈð tÌlls

s¡* of ¡r

fii*t

md

nfl*l

of

ïrÈ ttltl FEIÈe

i.'ü 3,e t¡.,llvË

lñ

.{.€rf

s¡{í*n

Note:

For requirements

of

lsolation

Valve and Car-Seal,

refer

to Clause

11.0

of this

RP

Figure-16:

Typical Arrangement

Showing

Block

Valves

in

Open

Position

with

Car-Seal

lnstalled

on the

lnlet

and

Outlet

of the

PRV.

a

a

Vssseì

E.R

o

t

z

*

)

)

(n

N-'

7/25/2019 KOC-MP-027 part 2


Paga 63

of

64

REV,

f

OC.

NO.

KOC-1tilp427 FART

2

E

ACKI¡OWLEDGEMENT

This Recommended

Practice

has been

approved

by

the

Standards

Technical

Committee

(STC)

consistin3

of

the

following:

Mr.

AJRedha

A.l-Haddad

Mr. Mohammad

Emam

Mr.

S.

Kumar

Mr. Henry

Hill

Mrs.

Amina

Rajab

Mr.

Khalaf

Hamada

Mr.

N.

Ramanathan

Mr.

Khalid Al-Ahmad

Mr.

Daniel Pino

Mr.

Ali

Hassan

Al-Failakawi

Dr,

Modistaba

Araghi

Mr. AbdulAziz

Akbar

Mr. Moataz

Khalaf

Standards

Team

lnsp.

Corr.

Team

(S E)

Standards Team

Opns,

Tech. Svcs.

ïeam

(SK)

Design

Team

Design

Team

Major Projects-EFP

Team

Gen.

Projects

Team

Utilities

TeamHSES Team

lnsp.

Corr.

Team

(N W)

Project

Mgmt,

Team

(NK)

lnformation

System

Team

Chairman

Deputy

Chairman

Secretary/

Member

Member

Member

Member

Member

Member

MemberMember

Mernber

Member

Member

The

draft

of

this

RP had

been circulated to

the

KOC

User

Teams for

review

and

the

responses

were

received

from

the

following:

ENGTNEERTNG

çRgUl

hlsE-GRouP

Team

Leader

Design

Team Leader

HSE

Systems

AHMADISERVICåS__ç-ROUP

EXPO,BT

MARINE

OPNS.

çROUP

Team Leader

ljtilities

Team

Leader

Export

Services

OPERATION

GROUP fSK)

MAJOR

PROJECTS

GROUP

Team

Leader

OPns.

Tech.

Svcs

Team

Leader

Prod.

OPns

oPERAÏoNs

GRquP

0{u-[)

Team

LeaderOPns.

Tech.

Svcs

Team

Leader Project

SuPPort

Team

Leader

Ëxp. Fac.

Proi.

DRILL¡

OPERATIONS

GROUP

Team

Leader

Drilling

Services

INDUS

IAL SERVICES

GROUP

ptvlDED

zoNE

GROUP

Team

Leader

lnsp.

corr.

(N

WK)

Team

Leader

Proj,

Engg.

Facilities

@

z

*

o

ú

¡j

ôÐ0---

7/25/2019 KOC-MP-027 part 2


DOC,

NO. KOC-[JIP-027 PART 2

P¡ge

64

of

04

REV.

1

This

KOC

Recommended

Practice for

Pressure

Relief

Devices:

Design

and

Materials

{KOC-MP-027 Part 2,

Rev.l}

has

been prepared

by

the Task Force

(TF-MP/O7)

comprising

of

the

following:

Mr. Mirza Mohsirr

Mr.

Raj

Maharaj

Mr.

Adnan

Bohammed

Mr.

Yousef M. Zaman

Mr.

Nawaf Al-Shehab

Mr.

Mohammed

Al-Ajmi

Standards

Team

Major

Projects

Team

Design

Team

Opns.

Tech.

Svcs.

(SK)

Opns.

Tech.

Svcs,

(NK)

Opns

ïech.

Svcs,

(WK)

TF

Leader &

Author

Member

Member

Member

Member

Member

Ex:61371

Ex:

66975

Ex:61815

Ex'.22241

Ëx:

23437

Ex: 20336

koc-mp-027 part 2

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