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WSA/D301 Rev D/2003 15105/1 Pipeline Accessories

SECTION 15105

PIPELINEACCESSORIES

REVISION HISTORY

D 28.01.03 Valves updated and increased RichardSmith

SteveKing

RichardSmith

C 08.07.02 Clause 1.3.1 amendedRichardSmith

SteveKing

RichardSmith

B 10.04.02 Review comments incorporatedRichardSmith

SteveKing

RichardSmith

A 18.11.01 General RevisionsRichardSmith

SteveKing

RichardSmith

0 01.11.01 WSA StandardRichardSmith

SteveKing

RichardSmith

Rev Date Description Prepared

by

Checked

by

Authorised

by

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1 GENERAL

1.1 SECTION INCLUDES

1.1.1 Include the General Conditions of the Contract as part of this section.

1.1.2 The Contractor shall become familiar with other sections of the Specifications affecting workof this trade.

1.1.3 Furnish all labour, materials, plant, equipment and appliances and perform all necessaryoperations required to execute the work of this section.

1.1.4 This section specifies the requirements for all pipeline accessories such as valves, meters,pressure reducing valves etc.

1.2 RELATED SECTIONS

1.2.1 This schedule is intended to be used as a helpful indication of the related sections within theProject Specifications. It is not necessarily comprehensive or complete and it is theContractor's responsibility to ascertain all applicable sections required to understand the fullScope of Works intended.

1.3 REFERENCES

1.3.1 The minimum standards for products specified in this section shall be those standards referredto or relevant BSI standards. In addition the Sultanate of Oman Ministry of Electricity andWater Design guidelines and the standards & guidelines for water supply systems part II 1997 shall also apply.

1.4 SUBMITTALS FOR REVIEW

1.4.1 Section 01300 - Submittals.

1.4.2 Submit samples, specifications, engineering calculations, catalogue cut sheets, description ofproduct and installation method in accordance with the Contract Documents. Submissionsshall indicate all dimensions, details of construction, details of installation, relation andconnections with adjoining work.

1.4.3 Submit copies of test reports required to be performed on the proposed products. Submit alist of installations completed where proposed products were used.

1.5 QUALITY ASSURANCE

1.5.1 GENERAL

Perform Work in accordance with relevant British Standards and industry standard codes.

1.5.2 TESTING: Ensure that valves and cocks are pressure tested at manufacturer's works, in accordance

with appropriate British Standards specification. Test valves in accordance with BS 6755Part 1.

1.6 QUALIFICATIONS

1.6.1 No specific requirements

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1.7 MOCK-UP


1.8 ENVIRONMENTAL REQUIREMENTS

1.8.1 All products shall be suitable for the environment in which they are to be installed.

1.9 WARRANTY

1.9.1 Section 01740 - Warranties and Bonds.

1.10 CROSS REFERENCE WITH NES

1.10.1 Text and numbers in square brackets are NES standard references

2 PRODUCTS

2.1 APPROVED MANUFACTURER OR PRODUCT


2.2 PRODUCT REQUIREMENTS

2.2.1 SAFETY AND RELIEF VALVES, SELF OPERATED, APPLICATION: Safety

- To discharge with rapid opening action to prevent pre-determined safe pressurebeing exceeded.

Relief

- To start discharging once safe pressure has been increased and to open in proportionwith further pressure increases.

2.2.2 EXPOSED VALVES: Fit easy-clean covers over glands and bonnets to small copper alloy valves exposed in

areas other than plant rooms. Fit thermoplastic valve wheels. Fit dust caps to lockshieldvalves.

2.2.3 LTHW AND CHILLED WATER VALVE SPECIFICATIONS (METALLIC)

Valves shall be provided to the following specifications

Valve Specifications

Purpose Size Description

Isolating 15-50

65-500

PN16 rated ball valve in dezincification resistantcopper alloy. PTFE seats and seals. Anti-blow outstem. Wrench or tee handle operated. Threaded toBS21. WRc Approved. British Gas tested and certifiedto BS1552. Equivalent to Hattersley fig. 100

Cast iron semi-lugged, long necked butterfly valve to

BS5155 and Kitemarked. With EPDM liner andaluminium bronze disc. Stainless steel shaft. Wrench

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or gear operated. To suit BS4504 PN16 flanges.

Equivalent to Hattersley fig. 950

Double Regulating 15-50

15 Ultra Low &Low Flow

(0.01 to 0.05 l/s)

65-300

Oblique pattern double regulating globe valve withslotted, parabolic disc. To BS5154 and Kitemarked.Also to conform to BS7350 and Kitemarked. Body

material bronze to BS1400 LG2 with DZR stem.Threaded to BS21. Equivalent to Hattersley fig. 1432

Double regulating globe valve with slotted parabolicdisc. body material bronze to BS1400 LG2, withbronze stem. Threaded to BS21. Equivalent toHattersley fig. 1473

Cast iron double regulating semi-lugged, long neckedbutterfly valve to BS5155 and Kitemarked. With

EPDM liner and aluminium bronze disc. Stainless steelshaft. Gear operated with double regulating feature.To suit BS4504 PN16 flanges. Equivalent to Hattersleyfig. 953G

FlowMeasurement

15-50

15 Low Flow(0.024 to 0.05

l/s)

65-300

Metering station. Body material bronze to BS1400LG2 with integral orifice and fitted with isolating testpoints and threaded to BS21. To conform to BS7350and Kitemarked. Equivalent to Hattersley fig. 1000

Metering station. Body material bronze to BS1400LG2 with integral orifice and fitted with isolating testpoints and threaded to BS21. Equivalent to Hattersley

fig. 1000M

Nickel plated, wafer pattern metering station. Bodymaterial cast iron to BS1452 Gr 220 with fixed orificein stainless steel BS970 316 S31 and supplied withisolating test points, gaskets, studs and nuts. ToBS7350 and Kitemarked. Equivalent to Hattersley fig.M2000

CommissioningSets

15-50

15 Low Flow(0.024 to 0.05

l/s)

Commissioning set comprising oblique pattern doubleregulating globe valve with slotted, parabolic disc. ToBS5154 and Kitemarked. Also to conform to BS7350

and Kitemarked. Body material bronze to BS1400 LG2with DZR stem. Threaded to BS21; close coupled tometering station. Body material bronze to BS1400LG" with integral orifice and fitted with double

isolating test points and threaded to BS21. Toconform to BS7350 and Kitemarked. Equivalent toHattersley fig. 2432

Commissioning set comprising double regulating globevalve with slotted parabolic disc. Body materialbronze to BS1400 LG2, with bronze stem. Threadedto BS21; close coupled to bronze metering station.

Body material bronze to BS1400 LG2 with integralorifice and fitted with double isolating test points and

threaded to BS21. Equivalent to Hattersley fig. 2473M

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65-300

Metrex double flanged butterfly valve commissioningset. Comprising cast iron semi-lugged butterfly valveto BS5155 and Kitemarked. With EPDM liner and

aluminium bronze disc. Stainless steel shaft. Gear

operated with double regulating feature; closecoupled to nickel plated cast iron metering station.body material in cast iron to BS1452 Gr. 220 withfixed orifice in stainless steel BS970 316 S31 andsupplied with double isolating test points, studs andnuts. To suit BS4504 PN16 flanges. Metering stationto BS7350 and Kitemarked. Equivalent to Hattersleyfig. 5953G

Strainers 15-50

65-300

'Y' type strainer. Body bronze to BS1400 LG2. Fittedwith stainless steel perforated screen. Threaded toBS21. WRc Approved. Equivalent to Hattersley fig.807

'Y' type strainer. Body in cast iron BS 1452 Grade2120. Fitted with stainless steel perforated screen.Flanged BS 4504 PN16. Equivalent to Hattersley fig.810

Non Return Valves 15-50

65-300

Swing check valve to BS5154 and Kitemarked. Bodyin bronze BS1400 LG2. Threaded to BS21. Equivalentto Hattersley fig. 47

Non-slam wafer check valve. Body in cast iron toBS1452 Gr. 220. EPDM seat vulcanized to bodycasting. Twin aluminium bronze discs, spring loaded.Stainless steel shaft. To suit BS4504 PN flanges.

Equivalent to Hattersley fig. 850

Vents 6-15 Key operated needle seated globe valve. Body inbronze to BS1400 LG2. Lockshield. Threaded toBS21. Equivalent to Hattersley fig. 5NLS

Drain Cocks 15-25 Ball valve in dezincification resistant copper alloy withhose union tail and captive cap. Lockshield operation.Threaded to BS21. WRc Approved. Equivalent toHattersley fig. 100HU CC

Pressure gaugeisolation

6-15 PN25 rated ball valve in dezincification resistantcopper alloy. PTFE seats and seals. Anti-blow stem.

Wrench operated. Threaded to BS21. WRcApproved. British Gas tested and certified to BS1552.Equivalent to Hattersley fig. 100

2.2.4 DOMESTIC WATER VALVE SPECIFICATIONS (METTALLIC)


Isolating 15 - 50 PN16 rated ball valve in dezincificationresistant copper alloy. PTFE seats and seals.Anti-blow out stem. Wrench operated.Compression ends to BS864/2. WRc

Approved. Equivalent to Hattersley fig. 100C

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65 - 300 Cast iron semi-lugged, long necked butterflyvalve to BS5155 and Kitemarked. WithEPDM liner and aluminum bronze disc.

Stainless steel shaft. WRc approved.

Wrench or gear operated. To suit BS4504PN16 flanges. Equivalent to Hattersley fig.951

Double check valve 15 - 28 Dezincification resistant copper alloy doublecheck valve to BS6282 Pt 1. Compressionends to BS864/2. WRc approved. Equivalentto Hattersley fig. 249C

15 - 80 Swing check valve to BS5154 andKitemarked. Body in bronze to BS1400 LG2.Threaded to BS21. WRc approved.Equivalent to Hattersley fig. 47

Non return valves

65 - 150 Non-slam wafer check valve. Body in cast

iron to BS1452 Gr. 220. EPDM seatvulcanized to body casting. Twin aluminiumbronze discs, spring loaded. Stainless steelshaft. To suit BS4504 PN16 flanges.Equivalent to Hattersley fig. 850

Drain valves 15 - 25 Ball valve in dezincification resistant copperalloy with hose union tail and captive cap.Lockshield operation. Threaded to BS21.

WRc Approved. Equivalent to Hattersley fig.100HU CC

15 - 50 Oblique pattern double regulating globevalve, to BS5154 and Kitemarked. Also toconform to BS7350 and Kitemarked. With aslotted, characterised disc. Body materialbronze to BS1400 LG2 with DZR stem.Threaded to BS21. WRc approved.Equivalent to Hattersley fig. 1432

15 low flow(0.01 to 0.05 l/s)

Double regulating globe valve with slottedcharacterised disc. Body bronze BS1400 LG2with bronze stem. Compression ends toBS864/2. WRc approved. Equivalent toHattersley fig. 1473C

Regulating Valves

65 - 150 Semi lugged double regulating butterfly valveto BS5155. Nitrile liner, aluminium bronzedisc. Stainless steel shaft. Gear operated.To suit BS4504 PN16 flanges. WRCapproved. Equivalent to Hattersley fig. 945G

Strainers 15 - 50 'Y' Type strainer. Body in bronze to BS1400LG2. Fitted with stainless steel perforated

screen. Threaded to BS21. WRc approved.Equivalent to Hattersley fig. 807

Pressure gauge

isolation

6 - 15 PN25 rated ball valve in dezincification

resistant copper alloy. PTFE seats and seals.Anti-blow out stem. Wrench operated.

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Threaded to BS21. WRc Approved.Equivalent to Hattersley fig. 100

Ball float valves 25 - 150 Equilibrium pattern ball float valve in bronzeto BS1400 LG2. Copper float. Threaded inletto BS21 or flanged drilled to BS4504 PN16complete with back nut. Equivalent toHattersley fig. 337 or 340

Relief valves 15 - 50 Spring relief valve in bronze to BS1400 LG2.

Set at system pressure plus 15%. Threadedto BS21. Insurance company approved.

Combined Vent &Drain valve

6 50 3 way gland cock in bronze to BS1400 LG2.Threaded BS21. WRc approved. Insurancecompany approved. Equivalent to Hattersleyfig. 85T

2.2.5 UNPLASTICISED PVC (PVC-U) AND ABS VALVES

Compatibility To be compatible with PVC pipework in both material and dimensional manner.

Standards BS5159

DIN 3202 Pressure Rating

10 bar(g) at 20C Isolation Valves

DN50 and below : quarter turn ball valve, solvent cement sockets with unions, PN16

rated Above DN50 : quarter turn butterfly valve with lever handle and ratchet setting or

handwheel and reduction gear, BS4504 flanges, PN10 rated DN20 to DN50 : Diaphragm valve, solvent cement sockets with unions, PN10 rated DN65 toDN160 : Diaphragm valve, BS4504 flanges, PN10 rated

Check (non return) Valves DN50 and below: Inline ball check valve, solvent cement sockets with unions, PN16

rated, dynamic pressure drop less than 5kPa DN 90 and below: angle seat check valve, solvent cement joints, PN10 rated,

dynamic pressure drop less than 5kPa Above DN90 : Wafer check valve, without springs, suitable for BS4504 flanges, PN6

rated, dynamic pressure drop less than 5kPa

Backing Flanges Galvanized steel backing flanges shall be used on all flanged joints.

Joint rings EDPM or FPM (according to liquid) flat gaskets shall be used on all flanged joints

2.2.6 BALL VALVES - GENERAL Where ball valves are installed on insulated pipework, extension spindles shall be

provided. Where ball valves are installed on exposed to view uninsulated pipework theyshall be provided with a Tee handle actuator and where a lockshield requirement isspecified the tee handle shall be fitted in the manner that the valve cannot be operatedwithout the use of a screwdriver. Exposed to view valves shall be cadmium or mattchrome plated.

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2.2.7 COMBINED CHECK AND ANTI-VACUUM TYPE ANTI BACK SYPHONAGE VALVES: Bronze or DZR copper alloy body assembly with compression connections to BS EN 1254-

2 or BS 864 Part 2. Pattern - In-line pattern. Components Stainless steel domed air inlet. Non-return valve with plastic body, rubber actuator and

stainless steel to plastic seal. Water Research Centre approval.

2.2.8 THREE WAY GLAND TYPE VENT COCK: Bronze body threaded to BS 21. Tapered plug with square shank for loose lever; plug

position indicator; bolted gland. Port markings to indicate inlet, vent, waste. T portconfiguration.

2.2.9 MICROBUBBLE TEMPERATURE DIFFERENTIAL DEAERATORS: Construction

1) Vertical mild steel housing incorporating internal spiral wound copper meshsystem.

2) Provide automatic air release mechanism.

Ends - Line size with flanges to BS 4504, PN 16.

Operating conditions1) Maximum temperature 110oC, maximum pressure 10 bar.

2.2.10 LTHW PRESSURE DIFFERENTIAL DEAERATORS: Unit

1) Provide a self-circulating unit connected to the system by two 15mm connectionsat least 500mm apart.

Isolation1) Provide valves to isolate the vessel from the main system.

Operating conditions

1) Maximum temperature 110oC, maximum pressure 10 bar.

2.2.11 CENTRIFUGAL AIR SEPARATORS: Construction

1) Vertical steel housing with offset inlet and outlet ports to remove bubbles viacentrifugal force.

2) Provide automatic air release mechanism.

Ends - Line size with flanges to BS 4504, PN 16.


2.2.12 GRAVITATION DIRT SEPARATORS:

Construction1) Vertical mild steel housing with internal reservoir, sludge pipe, perforation plate and

automatic air release mechanism.2) Ends - Line size with flanges to BS 4504, PN 16.


2.2.13 MICROBUBBLE AIR AND DIRT SEPARATORS:

Construction1) Vertical steel housing with internal large surface area mechanism to remove microbubbles via coalescence effect. Fitted with dirt drain at its lowest point for removing

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dirt that sinks, and fitted with a dirt drain valve on the side of the housing forremoving dirt that floats on the water.

Provide automatic air release mechanism.1) Ends - Line size with flanges to BS 4504, PN 16.


2.2.14 STEEL EXPANSION LOOPS: Provide expansion loop in material and finish of associated pipeline. Size to limit stress set

up in material of pipe wall to 69 MPa. Forge bend from a single length of pipe or join by welding fittings if expansion loops are

too large to manufacture in one piece. Where indicated, galvanise after manufacture.

2.2.15 COPPER EXPANSION LOOPS: Provide expansion loop in material and finish of associated pipeline. Size to limit stress set

up in material of pipe wall to 51.5 MPa. Forge bend from a single length of pipe.

2.2.16 A THREADED END EXPANSION COMPENSATORS, AXIAL BELLOWS:

Ends - Threaded to BS 21. Bellows - 316 stainless or cupro nickel, multi ply or single-ply construction fitted with 316

stainless or cupro nickel inner sleeves. Operation - Supply expansion joints capable of not less than 2000 complete reversals of

movement at the given working conditions; and of withstanding a pressure test of 1.5times the design pressure without deformation.

2.2.17 FLANGED EXPANSION COMPENSATORS, AXIAL BELLOWS: Ends - Flanged to BS 4504. Bellows 316 stainless or cupro nickel, multi ply or single-ply construction fitted with 316 stainless

or cupro nickel inner sleeves. Operation Supply expansion joints capable of not less than 2000 complete reversals of movement at

the given working conditions; and of withstanding a pressure test of 1.5 times thedesign pressure without deformation.

2.2.18 THREADED ENDS EXPANSION COMPENSATORS, ARTICULATED BELLOWS: Ends - Threaded to BS 21. Bellows - 316 stainless or cupro nickel, multi ply or single-ply construction fitted with 316

stainless or cupro nickel inner sleeves.

Operation - Supply expansion joints capable of not less than 2000 complete reversals ofmovement at the given working conditions; and of withstanding a pressure test of 1.5times the design pressure without deformation.

2.2.19 FLANGED EXPANSION COMPENSATORS, ARTICULATED BELLOWS: Ends - Flanged to BS 4504.

Bellows - 316 stainless or cupro nickel, multi ply or single-ply construction fitted with 316stainless or cupro nickel inner sleeves.

Operation - Supply expansion joints capable of not less than 2000 complete reversals ofmovement at the given working conditions; and of withstanding a pressure test of 1.5times the design pressure without deformation.

2.2.20 THREADED END EXPANSION COMPENSATORS, ANGULAR BELLOWS:

Ends - Threaded to BS 21.

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Bellows -316 stainless or cupro nickel, multi ply or single-ply construction fitted with 316stainless or cupro nickel inner sleeves.

Operation -Supply expansion joints capable of not less than 2000 complete reversals ofmovement at the given working conditions; and of withstanding a pressure test of 1.5times the design pressure without deformation.

2.2.21 FLANGED EXPANSION COMPENSATORS, ANGULAR BELLOWS: Ends - Flanged to BS 4504. Bellows - 316 stainless or cupro nickel, multi ply or single-ply construction fitted with 316

stainless or cupro nickel inner sleeves. Operation - Supply expansion joints capable of not less than 2000 complete reversals of

movement at the given working conditions; and of withstanding a pressure test of 1.5times the design pressure without deformation.

2.2.22 FLANGED EPDM RUBBER FLEXIBLE CONNECTIONS UP TO 10 BAR AND 100oC: Material

1) EPDM rubber with wire reinforced cuffs. Steel reinforcement within the body. Marking

1) Mould date of manufacture on bellows. Show manufacturer and type. Ends

1) Flanges to BS 4504 that can swivel and are removable. Operation

1) Ensure flexible connections have a design life of 120 months at 100oC. Provide tiebars with rubber top hat washers where working pressure exceeds 4 bar. Supplythreaded tie bars with adjustable length.

2) Ensure flexible connections are tied when the plant is on vibration isolationmountings.

2.2.23 THREADED END EPDM RUBBER FLEXIBLE CONNECTIONS UP TO 10 BAR AND 100oC:

Material1) EPDM rubber with wire reinforced cuffs. Steel reinforcement within the body.

Marking1) Mould date of manufacture on bellows. Show manufacturer and type.

Ends - Threaded to BS 21 with one union end. Operation

1) Ensure flexible connections have a design life of 120 months at 100oC. Provide tiebars with rubber top hat washers where working pressure exceeds 4 bar. Supply

threaded tie bars with adjustable length.2) Ensure flexible connections are tied when the plant is on vibration isolation

mountings.

2.2.24 FLEXIBLE CONNECTIONS ABOVE 100oC or above 10 bar: Material

1) Convoluted 316 stainless or cupro nickle, fully welded. Ends - Flanged to BS 4504. Ensure flanges can swivel.

1) Operation2) Ensure flexible connections are tied when the plant is on vibration isolation

mountings.

2.2.25 FLANGED EPDM RUBBER FLEXIBLE CONNECTIONS UP TO 10 BAR AND 70oC: Material

1) EPDM rubber with wire reinforced cuffs. Synthetic fibre reinforcement within thebody.

Marking - Mould date of manufacture on bellows. Show manufacturer and type. Ends - Flanges to BS 4504 that can swivel and are removable.

Operation

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1) Ensure flexible connections have a design life of 120 months at 100oC. Provide tiebars with rubber top hat washers where working pressure exceeds 4 bar. Supplythreaded tie bars with adjustable length.


2.2.26 THREADED END EPDM RUBBER FLEXIBLE CONNECTIONS UP TO 10 BAR AND 70oC: Material

1) EPDM rubber with wire reinforced cuffs. Synthetic fibre reinforcement within thebody.

Marking1) Mould date of manufacture on bellows. Show manufacturer and type.

Ends - Threaded to BS 21 with one union end. Operation

1) Ensure flexible connections have a design life of 120 months at 100oC. Provide tie

bars with rubber top hat washers where working pressure exceeds 4 bar. Supplythreaded tie bars with adjustable length.


2.2.27 TERMINAL UNIT CONNECTIONS FOR HEATING SERVICES - STAINLESS STEEL: Material

1) Stainless steel convoluted hose with stainless steel over braiding. Carbon steel,

stainless steel or copper tube end connections. Fully welded construction. Operation

2) Ensure hose length is sufficient to prevent the minimum hose bend radius from beingexceeded during installation and commissioning.

Working pressure 15 - 20 bar and temperature 95oC.

2.2.28 TERMINAL UNIT CONNECTIONS FOR CHILLED WATER SERVICES - STAINLESS STEEL: Material

1) Stainless steel convoluted hose with stainless steel overbraiding. Carbon steel,stainless steel or copper tube end connections. Fully welded construction. Nitrilerubber Class O' insulation with vapour seal and end protection caps.

Operation2) Ensure hose length is sufficient to prevent the minimum hose bend radius from

being exceeded during installation and commissioning.Working pressure 15 - 20 bar and temperature 95oC.

2.2.29 TEST PLUGS, SELF SEALING: Provide DZR copper alloy self sealing test plugs for measurement of temperature and

pressure, complete with captive cap for sealing when not in use. Ensure test plugs are

suitable for system operating temperature and pressure. Provide four thermometers and four pressure gauges for each range of conditions, for

use with test plugs.

2.2.30 TEST PLUGS, VALVE CONTROLLED: Provide DZR copper alloy self valve controlled test plugs for measurement of temperature

and pressure, complete with captive cap for sealing when not in use. Ensure test plugsare suitable for system operating temperature and pressure.

Provide one thermometer and pressure gauge for each range of conditions, for use withtest plugs.

2.2.31 THREADED PIPELINE STRAINERS, BRONZE: Material - Bronze to BS 1400, LG2. Ends - Threaded to BS 21.

Pattern - Y pattern body.

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Screen free area - Not less than 250% of pipe bore. Screen perforations

1. 15 to 50mm nominal size, within range 0.7 - 0.9 mm diameter.2. 65mm and over nominal size, within range 1.5 - 1.8mm diameter.

Internal to external flow through screen. Provide plugged connections for drain, air ventand differential pressure monitoring, threaded to BS 21.

2.2.32 FLANGED PIPELINE STRAINERS, BRONZE: Material - Bronze to BS 1400, LG2.

1. Ends - Flanged to BS 4504. Pattern - Y pattern body. Screen free area - Not less than 250% of pipe bore. Screen perforations

2. 15 to 50mm nominal size, within range 0.7 - 0.9 mm diameter.

3. 65mm and over nominal size, within range 1.5 - 1.8mm diameter. Internal to external flow through screen. Provide plugged connections for drain, air vent

and differential pressure monitoring, threaded to BS 21.

2.2.33 COMPRESSION PIPELINE STRAINERS, BRONZE: Material - Bronze to BS 1400, LG2. Ends - Compression fittings to BS EN 1254-2, or BS 864 part 2.

Pattern - Y pattern body. Screen free area - Not less than 250% of pipe bore. Screen perforations

1. 15 to 50mm nominal size, within range 0.7 - 0.9 mm diameter.2. 65mm and over nominal size, within range 1.5 - 1.8mm diameter.

Internal to external flow through screen. Provide plugged connections for drain, air ventand differential pressure monitoring, threaded to BS 21.

2.2.34 TUNDISHES, COPPER: Provide tundishes located adjacent to equipment, as indicated. Use 3mm minimum thickness copper sheet. Form sheet into a tapered reducing cone

with a minor diameter to suit drain line. Major diameter nominally 50 mm larger than minor diameter, tapering at approximately

30 degrees.

2.2.35 TUNDISHES, MILD STEEL, GALVANISED: Provide tundishes located adjacent to equipment, as indicated. Use mild steel sheet; galvanise after manufacture. Form sheet into a tapered reducing

cone with a minor diameter to suit drain line. Major diameter nominally 50 mm larger than minor diameter, tapering at approximately

30 degrees.

2.2.36 GAUGES, GENERAL: Use dial type gauges of robust construction, enclosed in dust tight metal cases. Retain

dial glass with bezels screwed to case. Finish with chromium plating. Use white dial scales indelibly and clearly marked with black lettering to indicate

measured values. Select scale ranges which indicate `Normal' when pointer is vertical orcentral on scale.

2.2.37 GAUGES, 100MM DIAMETER, DIRECT MOUNTING: Dial case - 100mm diameter for direct connection to instrument. Mount gauges with dial face in vertical plane and support casing by connection to

instrument.

2.2.38 GAUGES, 100MM DIAMETER, FLANGE MOUNTING: Dial case - 100mm diameter with annular mounting flange.

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Mount gauges with dial face in vertical plane and surface mount casing to equipment orbuilding element, as required.

2.2.39 TEMPERATURE GAUGES, GENERAL: Mercury in steel type, mounted direct in pocket. Use temperature gauges with pocket and provided with gland attachment on

thermometer stem. Use separable type pockets, threaded 15/19mm BSP and manufactured fromstainless

steel. Screw pockets into tapped bosses or stools set in pipelines or vessels. Fill pockets with oil

to BS 7207 to ensure contact with thermometer bulb. Provide gauges with dial graduation in degrees celsius marked on a logarithmic scale.

Ensure pointer movement is clockwise for increase in temperature. Provide sensing elements for air and gas systems, where indicated, and fix to provide

airtight joints. Provide with metal shielding around sensing element to prevent effects oflocal radiation from equipment.

2.2.40 TEMPERATURE GAUGES, MERCURY IN STEEL:

Provide mercury in steel temperature gauge, mounted direct in pocket.

2.2.41 TEMPERATURE GAUGES, VAPOUR PRESSURE TO BS 5235 FOR DIRECT MOUNTING: Vapour pressure type to BS 5235, mounted direct in pocket, with horizontal or vertical

stem as appropriate .

2.2.42 PRESSURE AND ALTITUDE GAUGES: Use vapour pressure type gauges to BS EN 837-1. Connect to pipeline systems via

matched gauge cocks and cock connectors. Ensure dial graduation is from zero tobetween 1.5 and 3.0 times normal working pressure. Graduate in bar (gauge) on gaugesreading head or working pressure, or in Pascals where pressure differences across plantitems are to be established.

Where fitted on boilers and pressure vessels, clearly mark with operating and maximum

permissible working heads in accordance with BS 759. Elsewhere provide gauges withnormal working pressure. Ensure dial movement is clockwise for an increasing head.

Fit syphons on steam systems. Provide flexible piping where gauge is subject to noticeable vibration.

Fit gauge cocks preceding all connections to altitude and pressure gauges; copper alloy,tapered ground plug, with ebonite lever. Unless flanged joints are required, screw inletends female and fit outlet ends with union connections allowing removal of gauges.

2.2.43 GAUGE MOUNTING BOARDS, MILD STEEL: Manufacture from 3mm mild steel plate, finished black stove enamel and trimmed with

chromium plated strips approximately 10mm wide. Mount on walls or purpose made steel frames at a height approximately 1.3m above

floor level.

2.2.44 LOOSE ITEMS, KEYS FOR SPINDLE SHANK VALVES: Provide 10 sets of tee handled short shank keys suitable for each size of valve spindle

shank.

2.2.45 LOOSE ITEMS, FOR DRAIN COCKS: Provide 10 lever pattern keys suitable for each drain cock and loose hose unions for drain

cocks

2.2.46 DOMESTIC WATER MANIFOLDS Domestic water manifolds shall be provided with an isolating valve on the inlet. Manifolds

shall be manufactured from non dezincifiable brass or other material suitable for the localwater conditions.

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Manifolds shall be equipped with integral lockshield valves so that each circuit can beregulated. Circuits shall be labelled.

Manifolds shall be PN10 rated..

Manifolds shall be contained in a purpose made plastic or metallic build in box unless

otherwise indicated.

All brackets, etc associated with manifold shall be made by the manifold maker.

Hot, cold and chilled cold water manifolds shall be colour coded.

Manifolds shall have a 20 year warranty. Associated buried piping shall have a 50 yearwarranty.

2.2.47 CONCEALED WALL BEARING ANGLE FITTINGS (BACKPLATE ELBOW) Room side under floor / under screed PE-X domestic water piping systems shall be

terminated with a purpose made wall bearing angle fitting that is designed to be built intothe wall and plastered / tiled over. This fitting shall be specifically designed for the pipingsystem and shall be secured using brackets and fixings designed and supplied by thefitting manufacturer . The fitting shall be designed so that taps, faucets and final anglevalve connectors can screw directly into the fitting as required, and allow tolerance fordiffering finishes thicknesses. The fitting shall be robust and shall not fracture or leak

under normal use.

2.2.48 FINAL DOMESTIC WATER TOP HAT STRAINERS Provide within the final angle valve connector to each domestic water outlet a top hat

strainer. Where faucets are wall mounted the strainer shall be provided at the inlet oroutlet of the manifold and final pipework flush before fitting faucet.

2.2.49 FLOW LIMITERS

Flow limiters shall be provided in all domestic water outlets to prevent excessive waterusage. Flow rates shall be controlled to within 10% of the value quoted below for inletpressure between 2.0 bar(g) and 3.5 bar(g) as follows:

3. Wash hand basin faucets (taps) : 6 litre / min4. Bath faucets (taps): 18 litre / min5. Showers 12 litre / min6. Kitchen and cleaners sinks 12 litre / min

2.2.50 DIFFERENTIAL PRESSURE VALVES On chilled water networks provide and install differential pressure valves, as indicated.

These valves shall be PN16 rated and be provided with a pilot pipe(s) so that the load

side pipework pressure differential can be detected and the valve directly operated so thatthe pressure difference is maintained to within 5% of the set point for upstreamdifferential pressures that range from that of a closed pump head to that which equatesto 10% of the load side dynamic pressure differential.

Differential pressure valves shall be maintenance free and have a working life of 20 years.

Valves shall be as made by Samson Controls or TA or equivalent.

2.2.51 STEAM TRAP FAILURE INDICATORS Materials:

1) Cast iron sensing chamber body.2) Cast steel sensing chamber body.

3) Stainless steel internal sensor and sensor gasket. Ends:

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4) Screwed ends to BS 21.5) Connect into assembly upstream of steam trap, as: indicated.6) Provide plug-in solid state electronic indicators complete with batteries, number as

indicated.

2.2.52 BALL TYPE VENT COCKS:

Bronze or DZR copper alloy body; chrome plated ball; PTFE seats and stem seals; blowoutproof stem. T port configuration.

2.2.53 AUTOMATIC AIR VENTS, FLOAT TYPE:

Construction:- Bronze or DZR copper alloy body with threaded inlet to BS 21. Solid polypropylene

float and air release valve. Ensure valve is self-closing. Operating Conditions:

- Maximum temperature 130oC.- Maximum pressure 10 bar.

Options:- Provide connection for piping away released air and integral non-return valve where

indicated.

2.2.54 SATURATED STEAM AT PRESSURE UP TO 10 BAR VALVE SPECIFICATIONS


Isolating 15-50 Globve valve to BS5154 and kitemarked.Body in bronze to BS1400 LG2. Renewabledisc. Threaded to BS21. Equivalent toHattersley Figure 13 or 13L

15-50 Globe valve to BS5154 and kitemarked.Body in bronze to BS1400 LG2. Renewable

disc. Flanged to BS4504 PN16. Equivalentto Hattersley Figure 17

65-300

(general)

Globe valve to BS 5152. Cast iron body withstainless steel seating faces. Flanged toBS4504 PN16. Equivalent to HattersleyFigure ,4731 or M4731L

Regulating &Throttling

15 50 VeeReg pattern globe valve to BS5154

series 'A'. Bronze body to BS1400 LG2.Stainless steel seat and disc. Threaded toBS21. Equivalent to Hattersley Fig 0123

15 50 Vee-Reg pattern globe valve to BS5154series A. Bronze body to BS1400 LG2.Stainless steel seat and disc. Flanged toBS4504 PN16. Equivalent to Hattersley Fig014.

Non Return Valves 15 50 Horizontal lift check valve to BS5154 andkitemarked. Bronze body to BS1400 LG2.Threaded to BS21. Equivalent to HattersleyFig 42

15- 50 Horizontal lift check valve to BS5154 and

kitemarked. Bronze body to BS1400 LG2.

Flanged to BS4504 PN16. Equivalent toHattersley Fig. 45.

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65 300 Horizontal lift check valve. Cast iron bodywith stainless steel seats. Flanged to BS4504 PN16. Equivalent to Hattersley Fig 45.

Strainers 15 50 'Y' type strainer. Body in bronze to BS1400LG2. Fitted with stainless steel perforatedscreen. Threaded to BS21. WRc approved.Equivalent to Hattersley Fig 807.

65 150 'Y' type strainer. Body in bronze BS1400

LG2. fitted with stainless steel perforatedscreen. Flanged to BS4504 PN25.Equivalent to Hattersley Fig. 808.

200 300 'Y' type strainer. Body in bronze BS1452Grade 220 Fitted with stainless steelperforated screen. Flanged to BS4504 PN16.

Equivalent to Hattersley Fig. 810.

2.2.55 CONDENSATE VALVE SPECIFICATIONS


Isolating 15 50 Ball valve in dezincification resistant copperalloy. PTFE seats and seals. Anti-blow outstem. Wrench operated. Compression endsto BS864/2. WRC approved. British gastested and certified to BS1552. Equivalent toHattersley Fig 100C.

65 300 Cast iron semi lugged, long necked butterflyvalve to BS5155 and kitemarked. With EPDMliner and aluminum bronze disc. Stainlesssteel shaft. Gear operated. To suit BS4504PN16 flanges. Equivalent to Hattersley Fig950G.

Non Return Valves 15 80 Swing check valve to BS 5154 andkitemarked. Body in bronze to BS1400 LG2.

Threaded to BS21. . Equivalent toHattersley Fig. 47.

2.2.56 GAS & FUEL OIL VALVE SPECIFICATIONS.


Incoming gas tobuilding

50 450 Soft seated gate valve to BS5150 andKitemarked Body in cast iron. Flanged toS4504 PN 16. British Gas Approved.Equivalent to Hattersley Fig. M519.

Gas & Oil 15 54 PN 16 rated ball valve in dezincificationresistant copper alloy. PTFE seats and seals.Anti-blow out stem. Wrench operated.Compression ends to BS864/2. British Gas

approved. Equivalent to Hattersley Fig 100C.

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15 50 Milliken lubricated plug valve. Body and plugin cast iron. Complete with wrench andpacked with suitable sealing compound.

Threaded to BS21. Equivalent to Hattersley

Fig 200M

15 50 PN 25 rated ball valve in dezincificationresistant copper alloy. PTFE seats and seals.Anti-blow out stem. Wrench operated.Threaded to BS21. British Gas tested andcertified to BS1552. Equivalent to HattersleyFig 100.

65 150 Milliken lubricated plug valve. Body and plugin cast iron. Complete with wrench andpacked with suitable sealing compound.Flanged to BS4504 PN16. Equivalent to

Hattersley Fig. 201m

200 Milliken lubricated plug valve. Body and plugin cast iron. Complete with suitable sealingcompound. Gear operated. Flanged toBS4504 PN16. Equivalent to Hattersley Fig.201MG.

250 300 Milliken lubricated plug valve. Body and plugin cast iron. Complete with suitable sealingcompound. Gear operated. Flanged to

BS4504 PN16. Equivalent to Hattersley Fig205MG.

2.2.57 LIGHT FUEL OIL


Non Return Valve 15 50 Swing check valve to BS5154 andkitemarked. Body in bronze to BS1400 LG2.Threaded to BS21. Equivalent to HattersleyFig 47.

2.2.58 COMPRESSED AIR VALVE SPECIFICATIONS


Isolating andDraining

15 50 PN25 rated ball valve in dezincificationresistant copper alloy. PTFE seats and seals.Anti-blow out stem. Wrench operated.Threaded to BS21. British Gas tested andcertified to BS1552. Equivalent to HattersleyFig 100.

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Isolation 65 150 Cast iron semi-lugged butterfly valve toBS5155 and kitemarked. Cast iron body withnitrile liner and aluminium bronze disc.

Stainless steel shaft. Wrench operated. To

suit 4504 PN15 flanges. Equivalent toHattersley Fig 951.

Non Return Valve 15-50 Horizontal lift check valve. Bronze body withrenewable nitrile elastometer disc and recoilspring. Threaded to BS 21. Equivalent toHattersley Fig 1213

65-300 Wafer check valve. Body in cast iron toBS1452 Gr 220. Nitrile seat vulcanized tobody casting. Twin aluminium bronze discs,spring loaded. Stainless steel shaft. To suitBS4504 PN16 flanges. Equivalent to

Hattersley Fig 851.

3 EXECUTION

3.1 EXAMINATION

3.1.1 Verify site conditions under provisions of Section 01400.

3.1.2 Before ordering any materials / commencing work verify that building structure associated

with the system is within tolerance and take full account of shape configuration and materialproperties of the structure.

3.2 PREPARATION

3.2.1 Refer to 3.5

3.3 HANDLING AND STORAGE

3.3.1 Deliver component parts to site, completely identified in accordance with shop and certified

drawings prepared for this work. Store in accordance with manufacturer's instructions, aboveground, properly protected from the weather and construction activities.

3.4 FABRICATION

3.4.1 No particular requirements

3.5 INSTALLATION

3.5.1 PRE INSTALLATION CHECKS

Before beginning installation in any area, examine all parts of the adjoining work into whichapplicable work is to be placed. Should any conditions be found which will prevent the properexecution of the work, installation shall not proceed in that area until such conditions are

corrected by the contractor.

3.5.2 British Standards Install pipeline ancillaries in accordance with manufacturer's recommendations and BS

6683.

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3.5.3 LOCATION: Install valves, cocks, traps, strainers, test plugs, tundishes and other ancillary equipment

in positions indicated. Ensure that all such items are fully accessible for operation andmaintenance.

3.5.4 POSITIONING OF COMPONENTS:

Locate flow and pressure measurement valves to ensure manufacturer's recommendedstraight length of pipe upstream and downstream of valve is provided.

3.5.5 POSITIONING OF DOUBLE REGULATING VARIABLE ORIFICE VALVE: Install double regulating variable orifice valve to ensure equivalent of 10 diameters of

straight pipe upstream and 5 diameters downstream of double regulating valve.

3.5.6 INSTALLATION OF CONTROL BALL VALVE:

Install control ball valves in accordance with manufacturer's recommendations.

3.5.7 POSITIONING OF CONTROL COMPONENTS: Install pipeline control components in accordance with manufacturer's instructions and in

positions indicated. Insulation

- Where control components are incorporated in insulated pipelines provide details ofinsulation method proposed, for approval.

Supports- Arrange supports for control components to ensure no strain is imposed on

components. Access

- Arrange control components to ensure adequate access for operation andmaintenance.

3.5.8 VENT COCKS: Provide outlets of vent cocks with discharge pipes.

3.5.9 VALVE STUFFING BOXES: Adjust glands of all stuffing boxes at normal plant operating temperature and pressure

in accordance with manufacturer's instructions. Ensure that valve action is not impairedby over tightening.

3.5.10 DISCHARGE CONNECTIONS, SAFETY VALVES: Fit pipework connections, where indicated, to provide discharge connection to Safety and

Relief valves terminating at a safe discharge point.

3.5.11 DISCHARGE CONNECTIONS, VENT COCKS: Fit pipework connections, where indicated, to provide discharge connection to vent cocks

terminating 150mm above floor level.

3.5.12 DISCHARGE CONNECTIONS, AIR BOTTLES:

Fit pipework connections, where indicated, to provide bleed connection from air bottlesterminating with air cock or needle valve in a convenient position.

3.5.13 EXPANSION DEVICES: Where expansion and contraction cannot be accommodated by selected route, provide

pipework loops, as indicated. Limit total stress set up in material of pipe wall, taking intoaccount components due to internal pressure, tension and bending to less than 69 MPa

for steel pipelines and less than 51.5 MPa for copper pipelines. Where location does not permit sufficient flexibility, provide proprietary devices, as

indicated.

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3.5.14 EXPANSION COMPENSATORS INSTALLATION: Provide anchors and guides to contain all movement and resist maximum loads imposed.

Install expansion compensators strictly in accordance with manufacturers instructions.

3.5.15 FLEXIBLE CONNECTIONS INSTALLATION: Fit rubber bellows as close to source of vibration as practicable. Ensure the pipe at other

end of bellows is a fixed point. Install flexible connections strictly in accordance withmanufacturers instructions.

Ensure flexible connections are tied when the plant is on vibration isolation mountings.

3.5.16 TERMINAL UNIT CONNECTIONS INSTALLATION: Install hose connections strictly in accordance with manufacturer's instructions

3.5.17 BUTTERFLY VALVE FLANGES Butterfly valves shall be provided with their own dedicated flanges and not connected

directly to items of plant and equipment.

3.5.18 ISOLATION VALVE LOCATIONS

Isolation valves shall be installed in the locations indicated on the tender drawings andalso in the following terminal locations, whether indicated or not: -

Terminal Type Valve Provision(Lockshield type)

Wash hand basins external toguestrooms and served by conventionalsurface mounted pipework

On hot and cold services feedingindividual basins or ranges of basins ifthe basins are in the same room andadjacent to each other. Where blending

valves are specified the isolation valvesshall be installed upstream of theblending valves.

Guestrooms served by manifold PE-Xpipework system

Isolation valve on inlet to each manifoldand lockshield valves (integral inmanifold) on each circuit. Where faucetsare not wall mounted provide angleservice valve prior to final connection.

Outlets served by manifold PE-Xpipework system

As above

Sinks/cleaners sinks served byconventional surface mounted pipework

On hot and cold services servicing eachsink/cleaners sink/bath.

WC cisterns/urinal cisternOn the cold supply to each WC cistern orurinal cistern.

Drinking Fountains served byconventional surface mounted pipework

On the cold service servicing eachdrinking fountain.

Showers served by conventionalsurface mounted pipework

On the hot and cold service to eachshower valve.

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3.5.19 REGULATION VALVE LOCATION Regulation valves/commissioning sets shall be installed on the HWS system as indicated

and also in the following locations whether indicated or not.

Branch Type Provision

Main branch off riser or branch servicing adepartment

Commissioning set

Sub branches Double regulation valve

3.6 FIELD QUALITY CONTROL

3.6.1 Provide field quality control under provisions of Section 01400 - Quality Control.

3.7 CLEANING

3.7.1 Section 01710 - Cleaning installed work.

3.7.2 Remove temporary labels after Work is complete.3.7.3 Remove paint and concrete splatters after work is complete.

3.8 PROTECTION OF FINISHED WORK

3.8.1 Protect work under provisions of Section 01710.

3.9 STANDARD SPECIFICATION

3.9.1 This standard specification is intended to be used as a helpful indication of work within thissection. It is not necessarily comprehensive or complete and it is the Contractor'sresponsibility to ascertain and complete the full works intended and as shown within the

drawings, specification and Contract or thereby implied.

END OF SECTION