emmanuel sauger cetim

ISO 15848-1: comparison with new fugitive emission standards Emmanuel SAUGER Cetim

28/05/2015 IVS 2015 • International Conference on Valve and Flow Control Technologies 1

Project overview

•  ISO 15848-1 is published since March 2006: “Classification system and qualification procedures for type testing of valves” o  End of DIS Enquiry (23/06/2014). Result of votes: approved.

o  FDIS Enquiry (November 2014 - January 2015). Result of votes: approved.

o  Publication of ISO 15848-1 rev 2 : June 2015

•  Test program at Cetim o  Study of ISO 15848-1 changes

o  Study of a valve performance (with the same packing) using various existing

fugitive emission standards


3

• Type of valve –  ON/OFF –  Control

• Source of emission

–  Stem seal system –  Body-bonnet seal

• Test fluid –  Helium –  Methane

• Test pressure –  Pressure class (P/T rating)

• Fugitive emission measurement –  Global method (stem seal)

–  Sniffing (body-bonnet seal)

• Performance class –  Tightness class

–  Endurance class

–  Temperature class

Changes of ISO 15848-1

ISO 15848-1 (March 2006)

4

n  Flushing n  Vacuum method

Global methods are quantitative, reliable, reproducible Difficult to perform, often need adaptation of the valve


ISO 15848-1 (March 2006) – Global methods

New global methods

n  Accumulation (EN 13185) n  « Suck through Method »

Gas detector

T1, C1 T2, C2

Volume V

( )( )f

pl

fC

QCCQ

−

×−∞=1

( )( )12

1l tt

VCCQ

−

×−= 2

0,0E+00

2,0E-06

4,0E-06

6,0E-06

8,0E-06

1,0E-05

1,2E-05

1,4E-05

1,6E-05

1,8E-05

0 2000 4000 6000 8000Rea

ding

of t

he h

eliu

m m

ass

spec

trom

eter

Time (s)

C∞

Cf


6

mg.s-‐1.m-‐1 per meter of stem circumference H : Helium M : Methane

Leak

rate

(mg.

s-1.m

-1)

Time (s)

Stabilisation time t1

Stabilisation time t2

t1 t2

Leakage 1

Leakage 2

Leak rate – Global measurement mg.s-‐1.m-‐1

AH & AM 10-‐6 BH & BM 10-‐4 CH & CM 10-‐2

Leakage – Sniffing (local measurement) ppmv

Helium ≤ 50 Methane ≤ 50


ISO 15848-1 (March 2006) – Tightness classes

•  Helium and methane o  Stem seal system

o  Body-bonnet seal

Vaccum

+ accumulation & suck through

New unit

7



•  Helium –  Stem seal system

–  Body seal

8



•  Methane –  Stem seal system

–  Body seal

–  § 6.2.4 There is no correlation intended between measurements of total leak rate

as described in Annex A and local sniffed concentration as described in Annex B.

9

(t-196) (t-46°C) (tRT) (t200°C) (t400°C)

- 196°C -46° C Room temperature °C 200° C 400° C

FLOW LINE (T1)

STUFFING BOX (T3)

BODY (T2)

T Flow Line (T1)

T Body (T2)

T Stuffing Box (T3)

Time

Temperature

t


ISO 15848-1 (March 2006) – Temperature classes

o  Reference flow line temperature

10

T1

T2

T3

Ttest

time

ISO 15848-1 (March 2006) – Temperature classes

o  Temperature reference at location 1 (flow line)

o  Optional thermocouple: location 4 may be used instead of location 1


11

On - off valves (full stroke) : endurance classes

0 500 1000 1500 2000 2500 3000

Number of mechanical cycles

Test

tem

pera

ture

(°C

) Test Fluid Pressure

Measurement of leakage of body sealMeasurement of leakage of stem sealTest Fluid Pressure

CO1CO2 CO3

ttest

RT1 2 25 66 622

4 3 4 3 43 43

Control valve : endurance classes

0 20000 40000 60000 80000 100000 120000

Number of mechanical cycles

Test

tem

pera

ture

(°C

)

Test Fluid Pressure

Measurement of leakage of body sealMeasurement of leakage of stem sealTest Fluid Pressure

CC1 CC2CC3

RT

ttest

1

4 3 4 3 43 4

2 2 66 622

3

5


ISO 15848-1 (March 2006) – Endurance classes

- Mechanical cycles + Thermal cycles - Nature and number of cycles are different for ON/OFF and Control Valves

12


ISO 15848-1 (March 2006) – Endurance classes

- CO1: 2 thermal cycles + 205 mechanical cycles - CO2 et CO3 unchanged

Publication of EN ISO 15848-1 and 2 : June 2015

ISO 15848-1:Testing facilities

03/2014 : ISO 17025 Certification by French Committee COFRAC

o  Validation of High Quality Measurements

o  Test capacity: •  18’’ (15 tonnes) •  450 bar •  -150°C to 450°C

13

Study of ISO 15848-1 changes – comparison with other standards

Chamber

14

Study of ISO15848-1 changes – comparison with other standards

•  Work program with French Valve Manufacturers –  Instrumentation of a valve (API 600, 4’’Cl300) to perform

helium and methane measurements with various methods (vacuum, accumulation, suck through, sniffing)

–  Graphite based packings •  ISO 15848-1 helium and CH4 à influence of test fluid and method •  API 624 helium and CH4 à influence of test fluid and sniffing

Study of ISO 15848-1 changes

GT Etanchéité du 21/10/2014

•  Work program –  Test on API 622 bench with the same packings

•  API 622 according API622 and API624 –  To compare API622 and API624 –  To compare test on valve and test on bench

hydraulic cylinder for stem movements

Detection of VOC with Foxborow TVA1000

page 15 15



Current status •  Progress from the previous work


Step Description Status

1 Instrumentation of a valve (Atex heating system, …) ü  2

Helium test according to ISO 15848-1 ü  Methane test according to ISO 15848-1 in progress

3 Helium test according to API624 ü 

Methane test according to API624 in progress

4 Methane test according to API622 ü  Methane test according to API624 ü 

5 Helium test according to API641 in progress

Methane test according to API641 in progress


17

0

40

80

120

160

200

240

280

1,E-‐08

1,E-‐07

1,E-‐06

1,E-‐05

1,E-‐04

1,E-‐03

1,E-‐02

1,E-‐01

0 50 100 150 200 250 300 350 400 450 500

Packing Temperature (°C) / Pressure (bar)

Leak ra

te (m

bar.l.s-‐1)

Number of cycles

Vacuum Flushing Accumulation Suck through VDI2440 Pressure Packing Temperature

CH (2006)

BH (2006)

AH (2006)

AH (2015)

VDI2440

•  Some results (CO1; 260°C - SSS; 41,4 bar)

–  good agreement between the methods –  Vacuum method is well adapted for class AH



0

50

100

150

200

250

300

1,00E-07

1,00E-06

1,00E-05

1,00E-04

1,00E-03

1,00E-02

1,00E-01

0 50 100 150 200 250 300

Cycles/Phasen

Fuite / Leak / Leck (mg.s-1.m-1) Pression/Presssure/Druck (bar) 'Température fluide

Valve reference :

�

�

Date / Datum:

�

�

�

�

Fuite

/ Le

ak /

Leck

(m

g.s-1

.m-1

)

ISO/CD 15848-1 Procedure 05/02/15

4"Cl300 Type de packing / Packing type : Graphite +AE

Classe BH

Classe CH

Classe AH

18



•  Some results (API624; Helium; 260°C - SSS; 41,4 bar)

–  Decrease of the leak rate during the first return at ambient temperature –  Leak rate close to those measured with ISO 15848-1

•  Conclusion o  Second revision of EN ISO 15848-1 will be published in June of 2015

o  ISO 15848-1 main changes are the following •  leak rate at the stem seal (Table 1) is expressed in mbar.l.s-1 per mm stem diameter; •  flushing method is replaced by accumulation or suck through method to measure leak rate from stem seal with Helium (Annex A);

•  leakage with methane is measured by sniffing; leakage is expressed in ppmv;

•  for tightness Class AH, leak rate ≤ 1,78·10-7 (10-5 mg.s-1.m-1) à TA Luft;

•  tightness classes (Table 3): AM ≤ 50 ppmv; BM ≤ 100 ppmv; CM ≤ 500 ppmv;

•  there is no correlation intended between helium (Class AH, Class BH, Class CH) and methane tightness classes (Class AM, BM and Class CM);

•  minimum number of mechanical cycles required for isolating valves: 205 cycles (instead of 500) with two thermal cycles.

19

Conclusion and scopes

•  Looking forwad o  A study is in progress

•  To evaluate impact of ISO 15848-1 changes (e.g. new possible leak rate measurements, comparison with VDI2440-TA Luft…)

•  To develop Test Rigs using methane as test fluid (API 622, API624, API641…)

•  To compare ISO 15848-1 with other procedures with various parameters

Ü  Test fluid

Ü  Thermal cycles

Ü  Mechanical cycles

Ü  Leakage measurement methods

o  Continuous evolution of test capacities of the Sealing Technology Lab to answer all kind of specific demand and ISO or API valve sealing system characterization

Acknowledgements to French Valve Manufacturers & to Profluid

20

Conclusion and scopes

Looking forward

•  Expiry of the next item

•  Expected results

•  Risks and known issues o  Expected time for the analysis of these

issues

•  Actions and measures immediately

following


Dependencies and resources

Project

Suppliers

Manufacturing

Sales Technical activities

Remote teams


Addendum


Addendum

•  Budget

•  Design documents

•  Marketing plan

•  Additional documents

•  Contact information


emmanuel sauger cetim

Documents