BS 5041-1-1987 消防栓系统设备.第1部分湿式水嘴接地阀规范.pdf

BRITISH STANDARD BS 5041-1 1987 Incorporating Amendment No.1 Fire hydrant systems equipment Part 1 Specification for landing valves for wet risers UDC 614.843.1 621.643.51 Licensed copyPONTYPRIDD COLLEGE, 08/10/2006, Uncontrolled Copy, BSI BS 5041-11987 This British Standard, having been prepared under the direction of the Fire Standards Committee, was published under the authority of the Board of BSI and comes into effect on 31 March 1987 BSI 03-1999 First published September 1975 First revision March 1987 The following BSI references relate to the work on this standard Committee reference FSM/6 Draft for comment 86/35835 DC ISBN 0 580 15721 0 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Fire Standards Committee FSM/- to Technical Committee FSM/6, upon which the following bodies were represented Association of County Councils Association of Metropolitan Authorities British Coal British Fire Services’ Association British Plastics Federation British Valve Manufacturers’ Association Ltd. Chief and Assistant Chief Fire Officers’ Association Convention of Scottish Local Authorities Copper Development Association Department of the Environment Property Services Agency Department of Transport Marine Directorate Fire Extinguishing Trades Association Fire Offices Committee Fire Protection Association Greater London Council Home Office Institution of Fire Engineers Ministry of Defence Royal Institute of British Architects The following body was also represented in the drafting of the standard, through subcommittees and panels British Fire Protection Systems Association Ltd. Amendments issued since publication Amd. No.Date of issueComments 5912September 1988 Indicated by a sideline in the margin Licensed copyPONTYPRIDD COLLEGE, 08/10/2006, Uncontrolled Copy, BSI w w w . b z f x w . c o m BS 5041-11987 BSI 03-1999i Contents Page Committees responsibleInside front cover Foreword ii Section 1. General 1Scope1 2Definitions1 3Valve types1 4Classification by pressure rating1 5Nominal inlet sizes2 6Temperature rating2 7Marking2 Section 2. Design 8Materials3 9Valve bodies3 10Valve inlets3 11Valve outlets3 12Bonnets3 13Stems3 14Stem sealing on globe valves5 15Glands on globe valves5 16Disks and disk facings5 17Handwheels and operation5 18Bolting5 19Pressure retention5 20Strap5 21Blank cap and chain5 22Water flow rate and outlet pressure5 23Outlet pressure at restricted pressure high pressure valves only6 24Resistance to high temperature diaphragm valves only6 Section 3. Production testing requirements and test certificate 25Hydrostatic tests7 26Pressure control test high pressure valves only7 27Test certificate7 Appendix A Test s8 Appendix B Recommendations for the ination to be supplied by the purchaser to the manufacturer9 Figure 1 Valve types1 Table 1 Choice of materials for components and parts4 Table 2 Bolting for valves5 Table 3 Body test pressures and durations8 Table 4 Seat test pressures and durations8 Publications referred to Inside back cover Licensed copyPONTYPRIDD COLLEGE, 08/10/2006, Uncontrolled Copy, BSI w w w . b z f x w . c o m BS 5041-11987 ii BSI 03-1999 Foreword This revision of BS 5041-1 has been prepared under the direction of the Fire Standards Committee and supersedes BS 5041-11975, which is withdrawn. It specifies requirements for valves suitable for use on wet risers of either high or low pressure installations. BS 5041-11975 was restricted to copper alloy globe valves but in this revision requirements for diaphragm valves are included. The subjects of the other Parts in the BS 5041 series of general specifications for fire hydrant systems equipment are as follows. Part 2 Landing valves for dry risers; Part 3 Inlet breechings for dry riser inlets; Part 4 Boxes for landing valves for dry risers; Part 5 Boxes for foam inlets and dry riser inlets. These Parts give detailed requirements for most of the other special items required for wet and dry risers described in BS 5306-1. In this standard metric values are given in SI units; for further ination reference should be made to BS 3763. Some nominal bores and thread sizes are given in inches to accord with the standards referred to. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 10, an inside back cover and a back cover. This standard has been updated see copyright date and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed copyPONTYPRIDD COLLEGE, 08/10/2006, Uncontrolled Copy, BSI w w w . b z f x w . c o m BS 5041-11987 BSI 03-19991 Section 1. General 1 Scope This Part of BS 5041 specifies requirements for copper alloy globe valves generally complying with BS 5154 and diaphragm valves generally complying with BS 5156, both suitable for installation as landing valves on wet risers. The valves have screwed or flanged inlets and also delivery hose connections complying with BS 336. This standard covers valves of nominal pressure PN designations 15 bar and 20 bar and nominal inlet sizes DN 40 to DN 65 for flanged ends and 1 and 2 for screwed ends. NOTE 1Unless otherwise stated all pressures are gauge pressures expressed in bar 1 bar 105 N/m2 100 kPa. NOTE 2Ination which the purchaser is recommended to supply to the manufacturer is given in Appendix B and does not part of the specification. NOTE 3The titles of the publications referred to in this standard are listed on the inside back cover. 2 Definitions For the purposes of this Part of BS 5041, the following definitions apply. 2.1 wet riser wet rising main a vertical pipe installed in a building for fire fighting purposes, permanently charged with water from a pressurized supply, and fitted with valves and outlet connections at specified points 2.2 landing valve an assembly comprising a valve and outlet connection from a wet or dry riser 3 Valve types Valves, whether globe or diaphragm, shall be of the horizontal, bib-nosed, oblique or right-angle type, the general s being illustrated in Figure 1. 4 Classification by pressure rating 4.1 General Valves shall be classified as low pressure or high pressure according to the nominal inlet working pressure for which they are suitable. 4.2 Low pressure valves Low pressure valves shall be suitable for use at nominal inlet pressures up to 15 bar. 4.3 High pressure valves High pressure valves shall be suitable for use at nominal inlet pressures up to 20 bar. Figure 1 Valve types Licensed copyPONTYPRIDD COLLEGE, 08/10/2006, Uncontrolled Copy, BSI w w w . b z f x w . c o m BS 5041-11987 2 BSI 03-1999 5 Nominal inlet sizes 5.1 Flanged end valves The nominal inlet size DN shall be 40, 50 or 65. 5.2 Screwed end valves The nominal inlet size DN shall be 1, 2 or 2. 6 Temperature rating Both low pressure and high pressure valves shall be suitable for continuous use at their nominal pressure rating throughout the temperature range from 0 C to 38 C. 7 Marking 7.1 General Each valve shall be marked with the following a the letters “LP” for low pressure valves or “HP” for high pressure valves in a position which will be visible after the valve has been installed; b the nominal size; c the manufacturer’s name or trademark; d the number of this standard, i.e. BS 5041/11. 7.2 Diaphragm valves The diaphragm shall be marked “FIRE HYDRANT”, “FIRE HYD” or with the manufacturer’s grade reference for the particular material. The marking shall be visible on the assembled valve. 1 Marking BS 5041/1 on or in relation to a product is a claim by the manufacturer that the product has been manufactured to the requirements of the standard. The accuracy of such a claim is therefore solely the manufacturer’s responsibility. Enquiries as to the availability of third party certification should be addressed to the appropriate certification body. Licensed copyPONTYPRIDD COLLEGE, 08/10/2006, Uncontrolled Copy, BSI w w w . b z f x w . c o m BS 5041-11987 BSI 03-19993 Section 2. Design 8 Materials Each component or part of the valve shall be made from one of the materials given in Table 1. 9 Valve bodies 9.1 Body wall thickness The body wall thickness at any point shall be as follows. a For low pressure valves not less than shown in Table 6 of BS 51541983 for PN 16 for the appropriate size of valve. b For high pressure valves not less than shown in Table 6 of BS 51541983 for PN 20 for the appropriate size of valve. 9.2 Body seat The body seat shall be either integral with the body or inserted in the of a securely fitted but renewable ring. The shape of the seating surface shall be suited to the type of disk used see clause 16. 9.3 Seating face The seating face shall be not less than 3 mm wide. 10 Valve inlets 10.1 General Valve inlets shall be either flanged see 10.2 or screwed see 10.3. 10.2 Flanged ends 10.2.1 Inlet flanges shall be in accordance with the following tables in BS 4504-21974, with the possible exception of drilling see 10.2.2 a for low pressure valves Table 16/21 for the appropriate size of valve; b for high pressure valves Table 25/21 for the appropriate size of valve. The casting surrounding the bolt holes on the flange shall be cast smooth and level or machined or spot faced to ensure satisfactory bolting. Holes shall be equally spaced on the pitch circle diameter and shall be drilled “off centres”. If a flange is fitted with an “O” ring seal then the seal shall comply with BS 1806 or BS 4518. 10.2.2 If the purchaser does not specify drilling requirements for the flanges, they shall be drilled in accordance with Table 16/21 low pressure valves or Table 25/21 high pressure valves of BS 4504-21974. 10.3 Screwed ends 10.3.1 Body ends shall be hexagonal or of shape suitable for a hook or “C” spanner to facilitate tightening. 10.3.2 Screwed ends shall have male or female threads complying with BS 21. 10.3.3 The thickness of male ends shall be not less than 3 mm from the root diameter of the thread to the bore of the inlets. 11 Valve outlets Outlet end connections shall be either integral or screwed on, and shall be of female instantaneous pattern complying with BS 336. 12 Bonnets 12.1 Diaphragm valves The bonnet to body connection shall be bolted. 12.2 Globe valves The bonnet to body connection shall be screwed or union or bolted. The surfaces ing the bonnet and body joint shall be machined. The joint may be metal to metal, or made with a gasket or “O” ring of non-shrinking material and complying with BS 1806 or BS 4518. 12.3 Bonnet wall thickness The bonnet wall thickness at any point shall be as follows a for low pressure valves not less than shown in Table 6 of BS 51541983 for PN 16 for the appropriate size of valve; b for high pressure valves not less than shown in Table 6 of BS 51541983 for PN 20 for the appropriate size of valve. 13 Stems 13.1 General Valves shall be of the rising stem inside screw type, having the actuating thread within the bonnet or otherwise protected from damage and the external environment. They shall be ed in one piece, and shall be of sufficient length to ensure a minimum clearance of 40 mm between the handwheel and any part of the valve vertically below the periphery of the handwheel, and between the handwheel and the plunger release lug on the outlet. Licensed copyPONTYPRIDD COLLEGE, 08/10/2006, Uncontrolled Copy, BSI w w w . b z f x w . c o m BS 5041-11987 4 BSI 03-1999 Table 1 Choice of materials for components and parts ComponentMaterialBritish Standard number Grade or designation Low pressure and high pressure valves BodyCopper alloy1400LG2 or LG4 BonnetCopper alloy1400 2872 2874 LG2 or LG4 CZ114 or CZ122 StemCopper alloy2874CZ112, CZ113, CZ114 or CZ121 DiskCopper alloy1400 2872 or 2874 LG2 or LG4 CZ114 or CZ122 OutletCopper alloy1400LG2 or LG4 HandwheelCopper alloy Malleable cast iron Grey cast iron Spheroidal graphite cast iron Aluminium alloya 1400 2872 6681 1452 2789 1490 LG2 or LG4 CZ114 or CZ122 150 or 180 LM6 or LM25 Renewable disk facing Rubber Chloroprene 1154 2752 70 IRHD minimum nominal hardness DiaphragmRubberManufacturer’s standard Black capCopper alloy1400 2872 LG2 or LG4 CZ114 or CZ122 Aluminium alloya1490LM5 condition M LM6 condition M LM16 condition TF LM25 condition TB or TF Bolting globe valves diaphragm valves Carbon steelb, tensile strength not less than 390 N/mm2 Aluminium bronze 1506 2872 162 CA104 CompressorGrey cast iron Copper alloy 1452 1400 150 LG2 or LG4 High pressure valves only Relief valve seatingRubber Chloroprene 1154 2752 85 IRHD minimum nominal hardness NylonHardness HV 5 to HV 12 when measured in accordance with BS 427-1 Relief valve springCopper alloy Stainless steel Pressure regulating spring Chrome vanadium steel BS 970-5735 A50 a The surface shall have an anodized finish of thickness not less than grade AA15 of BS 16151987, and the anodic oxidation coating shall be sealed see clause 7 of that standard. b Free cutting steels shall not be used. Licensed copyPONTYPRIDD COLLEGE, 08/10/2006, Uncontrolled Copy, BSI w w w . b z f x w . c o m BS 5041-11987 BSI 03-19995 13.2 Stem sizes The diameter of the stem shall be not less than 16 mm where the stem is made from CZ114, or 19 mm where the stem is made from any other copper alloy see Table 1. The size of any square or drive on the stem shall be not less than 12 mm across flats. Where the handwheel is attached to the stem using a pin, the minimum cross-sectional dimension at that point shall be not less than 14.5 mm. 13.3 Threads on stems The actuating thread shall be either Acme or “V” . The root diameter of the thread shall be not less than the following a 16 mm for stems of CZ114; b 19 mm for stems of CZ112, CZ113 or CZ121. 13.4 Retention of stem It shall not be possible for the spindle to pass completely through the gland nut. 14 Stem sealing on globe valves Globe valves shall be provided with one of the following means of sealing the stems a an “O” ring complying with BS 1806 or BS 4518; or b a rubber gland seal; or c a stuffing box gland. It shall be possible to replace the seal or repack the gland when under pressure with the valve fully closed. 15 Glands on globe valves Glands on globe valves shall be either screwed or bolted Screwed glands shall consist of a gland and gland nut when used as a stuffing box. Bolted glands shall be either a solid type or a two-piece self-aligning type. 16 Disks and disk facings Disks shall be provided with resilient facings which may be renew