10_pdfsam_PS
2
K/10 Water Supply Plumbing, Sanitary Installation and Rain Water Goods Installation stainless steel pipe fitting s or BS 143 & 1 256 brass threaded fit ting s for external pipework shall be used. High strength composite plastic/ metal pipes and fittings may be allowed with the S.O’s approval. Galvanised iron pipes and fittings shall not be used for external pipework. c) Isolation Valves for Internal P lumbing and External Pipework Valves used for isolating the wat er supply system shall be of approved full bore brass gate valves (BS5154) or Type B ductile iron gate valves (J KR Stand ard Specification 2 020 0-008 3-00), b rass ball valves (BS 6675:1986 or BS 1552:1995) shall be used. All fittings used shall be m ade of brass, stainless steel or other approved non-corrodible mat erial. Stop valves (stop cocks with reduced flow areas) shall not be used for external pipework and internal plumbing systems for w/c flush valves and flushing cistern. 2.2.4 Operating/ Dynam ic P ressure More Than 30 Metres Unless otherw ise instruct ed by t he S.O, air vent s and pressure reducing va lves of approved t ype (J KR Stan dard Specificat ion 202 00-0 114 -01), shall be installed at 30 m eters intervals along downpipes in order to restrict the pressure sustained by the fittings to prevent water hammer and other effects. 2.3 uPVC Soil, Waste and Vent P ipes 2.3.1 Unless oth erwise shown or specified in the Drawings, approved uPVC soil, waste and vent pipes shall be provided. 2.3.2 uPVC pipes shall conform to MS 978 and MS 1063. The pipes shall be prov ided, fixed and connected to fittings and sanitary installation complete with all necessary bends, tees, sockets, branches, offsets, inspection pieces, hopper heads, holder bat s etc. P ipes shall be joined wit h approved solvent cem ent in accordance with the manufacturer's instructions. 2.3.3 Expansion joints (expansion couplings for uPVC p ipes) Where pipework is construct ed using solvent w elded joints, expansion joints shall be provided to com pensate for the linear therm al expansion of uP VC pipes which have a coefficient of linear expansion of 7x10 -5 mm/mm o C(e.g. for a difference of 1 0 o C, linear expansion of 3 m length uPVC pipe = 10 x 3000x 7x 10 -5 =2.1mm). Expansion joint s must not be p laced below gr ound level. All expansion joints shall be installed with the proper fittings in accordance with the manufacturer’s instructions. 2.3.3.1 Expansion joints shall be provided at a m axim um spacing of 6 m eters for cold water pipelines and 4 meters for hot water pipelines (e.g. kitchen or etc.) or wherever specified 2.3.3.2 The permissible maxim um length of pipelines between fixed points without an expansion joint or provision for movem ent is 2 meters for cold water p ipelines and 1 meter for hot water pipelines. A fixed point is one at which longitudinal movement of the pipe or fitting is restrained. 2.3.3.3 An expansion joint shall be construct ed wit h a device or a definite means to ensure the provision of the desired gap for thermal expansion between the two pipes during installation. 2.3.3.4 Any expansion joint provided shall incorporate a permanent shield to provide protection to the sliding surfaces and rubber ring seal from ingression of dust particles.
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Transcript of 10_pdfsam_PS
K/10
Water Supply Plumbing, Sanitary Installation and Rain Water Goods Installation
stainless steel pipe fittings or BS 143 & 1256 brass threaded fittings forexternal pipework shall be used. High strength composite plastic/ metalpipes and fittings may be allowed with the S.O’s approval. Galvanisediron pipes and fittings shall not be used for external pipework.
c) Isolation Valves for Internal Plumbing and External Pipework
Valves used for isolating the water supply system shall be of approvedfull bore brass gate valves (BS5154) or Type B ductile iron gate valves(J KR Standard Specification 20200-0083-00), brass ball valves (BS6675:1986 or BS 1552:1995) shall be used. All fittings used shall bemade of brass, stainless steel or other approved non-corrodible material.Stop valves (stop cocks with reduced flow areas) shall not be used forexternal pipework and internal plumbing systems for w/c flush valvesand flushing cistern.
2.2.4 Operating/ Dynamic Pressure More Than 30 Metres
Unless otherwise instructed by the S.O, air vents and pressure reducing valvesof approved type (J KR Standard Specification 20200-0114-01), shall be installedat 30 meters intervals along downpipes in order to restrict the pressure sustainedby the fittings to prevent water hammer and other effects.
2.3 uPVC Soil, Waste and Vent Pipes
2.3.1 Unless otherwise shown or specified in the Drawings, approved uPVC soil,waste and vent pipes shall be provided.
2.3.2 uPVC pipes shall conform to MS 978 and MS 1063. The pipes shall be provided,fixed and connected to fittings and sanitary installation complete with allnecessary bends, tees, sockets, branches, offsets, inspection pieces, hopperheads, holder bats etc. Pipes shall be joined with approved solvent cement inaccordance with the manufacturer's instructions.
2.3.3 Expansion joints (expansion couplings for uPVC pipes)
Where pipework is constructed using solvent welded joints, expansion joints shallbe provided to compensate for the linear thermal expansion of uPVC pipes whichhave a coefficient of linear expansion of 7x10-5mm/mmoC(e.g. for a difference of 10 oC, linear expansion of 3 m length uPVC pipe =10 x 3000x 7x 10-5=2.1mm).Expansion joints must not be placed below ground level. All expansion jointsshall be installed with the proper fittings in accordance with the manufacturer’sinstructions.
2.3.3.1 Expansion joints shall be provided at a maximum spacing of 6 meters forcold water pipelines and 4 meters for hot water pipelines (e.g. kitchen oretc.) or wherever specified
2.3.3.2 The permissible maximum length of pipelines between fixed pointswithout an expansion joint or provision for movement is 2 meters for coldwater pipelines and 1 meter for hot water pipelines. A fixed point is oneat which longitudinal movement of the pipe or fitting is restrained.
2.3.3.3 An expansion joint shall be constructed with a device or a definitemeans to ensure the provision of the desired gap for thermal expansionbetween the two pipes during installation.
2.3.3.4 Any expansion joint provided shall incorporate a permanent shield toprovide protection to the sliding surfaces and rubber ring seal fromingression of dust particles.
