BS 5153-1974 通用铸铁止回阀.pdf

BRITISH STANDARD CONFIRMED NOVEMBER 1991 BS 51531974 Incorporating Amendment Nos. 1, 2 and 3 Specification for Cast iron check valves for general purposes UDC 621.646.248669.13 Licensed Copy Jacobs user, Jacobs Engineering, Tue Mar 27 084634 GMT0000 2007, Uncontrolled Copy, c BSI BS 51531974 This British Standard, having been approved by the Mechanical Engineering Industry Standards Committee, was published under the authority of the cutive Board on 30 September 1974 BSI 05-1999 First published, as BS 4090, December 1966 First revision, as BS 5153, September 1974 The following BSI references relate to the work on this standard Committee reference MEE/81 Draft for comment 72/34/38DC ISBN 0 580 08349 7 Co-operating organizations The Mechanical Engineering Industry Standards Committee, under whose supervision this British Standard was prepared, consists of representatives from the following Government departments and professional and industrial organizations Associated Offices Technical Committee*Department of Industry National Association of Consulting EngineersEngineering Laboratory Association of Hydraulic EquipmentDepartment of Trade Manufacturers Ltd.Electricity Supply Industry in England and Association of Mining Electrical and Wales* Mechanical EngineersEngineering Equipment Users’ Association* British Compressed Air Society*Federation of Manufacturers of Construction British Electrical and Allied Manufacturers’ Equipment and Cranes AssociationInstitution of Gas Engineers* British Gas Corporation*Institution of Heating and Ventilating British Gear Manufacturers’ AssociationEngineers* British Internal Combustion Engine Institution of Mechanical Engineers* Manufacturers’ AssociationInstitution of Plant Engineers British Mechanical Engineering Institution of Production Engineers* ConfederationLondon Transport cutive British Pump Manufacturers’ AssociationMachine Tool Trades Association British Steel CorporationMinistry of Defence* British Steel Industry*Ministry of Defence, Army Department Crown Agents for Oversea Governments and National Coal Board AdministrationsProcess Plant Association Department of Employment HM Factory Railway Industry Association of Inspectorate*Great Britain Department of the Environment*Royal Institute of British Architects Department of Industry Mechanical Telecommunication Engineering and EngineeringManufacturing Association The organizations marked with an asterisk in the above list, together with the following, were directly represented on the committee entrusted with the preparation of this British Standard Association of Bronze and Brass FoundersInstitute of Marine Engineers British Chemical Engineering Contractors’ Institute of Quality Assurance AssociationInstitution of Chemical Engineers British Industrial Measuring and Control Institution of Civil Engineers Apparatus Manufacturers’ AssociationInstitution of Municipal Engineers British Ship Research AssociationInstitution of Water Engineers British Valve Manufacturers’ Association Metropolitan Water Board Ltd.National Brassfoundry Association CBMPEOil Companies’ Materials Association Chemical Industries Association Ltd.Society of British Gas Industries Greater London CouncilWater Companies’ Association Institute of British Foundrymen Amendments issued since publication Amd. No.Date of issueComments 2319August 1997 3927June 1982 6067July 1989Indicated by a sideline in the margin Licensed Copy Jacobs user, Jacobs Engineering, Tue Mar 27 084634 GMT0000 2007, Uncontrolled Copy, c BSI BS 51531974 BSI 05-1999i Contents Page Co-operating organizationsInside front cover Foreword iii Section 1. General 1Scope1 2References1 3Terminology and definitions1 4Types1 5Nominal sizes1 6Nominal pressure2 7Pressure/temperature ratings2 Section 2. Body ends 8Flanged body ends2 9Screwed body ends3 Section 3. Design and manufacture 10Bodies4 11Body tappings5 12Body to cover connection5 13Bolting5 14Seats5 15Disks5 Section 4. Materials 16Choice of materials5 17Trim5 Section 5. Testing and inspection 18Production pressure testing8 19Test certificate8 20Inspection8 21Witnessing of tests8 22Certificate of conity8 Section six. Preparation for despatch 23After testing8 24Disk position8 25Body ends8 Section 7. Marking 26General8 27Body markings9 28Identification plate markings9 29Body or identification plate markings9 30Material symbols9 31Additional markings9 32Omission of markings10 Section 8. Valves for use in ANSI flanged piping systems 33Requirements10 Section 9. Enquiry or order ination 34Ination to be supplied10 Appendix A Cast iron check valves for general purposes with ANSI Class 125 flanges11 Licensed Copy Jacobs user, Jacobs Engineering, Tue Mar 27 084634 GMT0000 2007, Uncontrolled Copy, c BSI BS 51531974 ii BSI 05-1999 Page Table 1 Pressure/temperature ratings2 Table 2 Face-to-face and centre-to-face dimensions3 Table 3 Minimum outside diameters of sealing faces for parallel threaded valves4 Table 4 Dimensions of body end ports and seat bores4 Table 5 Basic materials6 Table 6 Table deleted7 Table 7 Dimensions of ANSI Class 125 flanges11 Table 8 Pressure/temperature ratings for Class 125 valves12 Table 9 Test pressure gauge for Class 125 valves12 Publications referred toInside back cover Licensed Copy Jacobs user, Jacobs Engineering, Tue Mar 27 084634 GMT0000 2007, Uncontrolled Copy, c BSI BS 51531974 BSI 05-1999iii Foreword BS 5153 replaces BS 4090, first published in 1966. This revision, prepared under the authority of the Mechanical Engineering Industry Standards Committee, is in metric units. It is one of a series of new and revised standards in metric units for general purpose valves which have a new series of consecutive numbers. There are no International or European Standards in this field but account has been taken of all relevant proposals under consideration in the ISO Technical Committee and CEN1 Working Group concerned with general purpose valves. For flanged valves, the standard is based on the use of flanges complying with the requirements of BS 4504 “Flanges and bolting for pipes, valves and fittings. Metric series” but, by the use of Appendix A, the appropriate modifications can be made when using ANSI Class 125 flanges. 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 to iv, pages 1 to 12, 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. 1 European Committee for Standardization. Licensed Copy Jacobs user, Jacobs Engineering, Tue Mar 27 084634 GMT0000 2007, Uncontrolled Copy, c BSI iv blank Licensed Copy Jacobs user, Jacobs Engineering, Tue Mar 27 084634 GMT0000 2007, Uncontrolled Copy, c BSI BS 51531974 BSI 05-19991 Section 1. General 1 Scope This British Standard specifies requirements for flanged and screwed end cast iron check valves, copper alloy faced, nickel alloy faced, stainless steel faced, resilient seated, or all-iron for general purposes. It covers swing check valves of nominal pressure PN designations of 6 bar2 to 25 bar and lift check valves of nominal pressure PN designations of 10 bar to 25 bar. Flanged end valves are in accordance with the appropriate tables of BS 4504 for nominal sizes DN 10 to 1 000 and screwed end valves comply with the requirements of BS 21 for nominal sizes to 6. However, when valves are required for use in ANSI BS 1560 flanged systems, reference should be made to clause 33 and Appendix A. Where there is an appropriate application standard or code of practice it is the responsibility of the purchaser to ensure that its requirements are complied with; for example, attention is drawn to BS 806 and BS 759-1. 2 References The titles of the British Standards and international publications referred to in this standard are listed on the inside back cover. 3 Terminology and definitions For the purposes of this British Standard the following definitions apply for flanged valves face-to-face dimension the distance between the two planes perpendicular to the valve axis located at the extremities of the body end ports centre-to-face dimension the distance between the plane located at the extremity of either body end port and perpendicular to its axis and the other body end port axis 4 Types Valves shall be of one of the following types a swing not including tilting disk type straight pattern for use with the axis of the body end ports horizontal or vertical b lift 1 straight pattern for use with the axis of the body end ports horizontal; 2 straight pattern for use with the axis of the body end ports vertical; 3 angle pattern for use in applications where the axes of the body end ports are at 90. When swing check valves are used in vertical lines, the flow shall be in an upward direction. 5 Nominal sizes 5.1 For flanged ends the ranges of nominal sizes DN shall be as follows a Swing 10, 15, 20, 25, 32, 40, 50, 65, 80, 100, 125, 150, 200, 250, 300, 350, 400, 450, 500, 600, 700, 800, 900, 1 000. b Lift 10, 15, 20, 25, 32, 40, 50, 65, 80, 100, 125, 150, 200, 250, 300, 350, 400, 450. 5.2 For screwed ends the range of nominal sizes shall be as follows ;, , 1, 1, 1;, 2;, 3, 4, 5, 63. 2 1 bar 105 N/m2 100 kPa. 3 This size is included for replacement purposes with BS 21 threads or for use with other thread s see 9.2. Licensed Copy Jacobs user, Jacobs Engineering, Tue Mar 27 084634 GMT0000 2007, Uncontrolled Copy, c BSI BS 51531974 2 BSI 05-1999 6 Nominal pressure Valves shall be designated by nominal pressure PN, defined as the maximum permissible gauge working pressure bar4 at 20 C, as follows PN 6, PN 10, PN 16, and PN 25. 7 Pressure/temperature ratings 7.1 The valves specified in this standard shall have maximum ratings for liquid, gas and steam as detailed in Table 1. 7.2 Restrictions on temperature may be placed by the manufacturer on valves in accordance with this standard by reason of valve type, trim materials or other factors in which case valves shall be marked with the limiting temperature [see clause 28 b]. All valves, however, shall be suitable for continuous use at their PN designation within the temperature range of –10 C to 65 C. Table 1 Pressure/temperature ratings Section 2. Body ends 8 Flanged body ends 8.1 Flange dimensions shall comply with the relevant requirements of BS 4504. 8.2 Flanges shall be at right angles to the axis of the bore and concentric with the bore. Flanges shall be drilled unless otherwise specified and bolt holes shall be “off centres”. 8.3 The face-to-face and centre-to-face dimensions shall be as detailed in Table 2. 8.4 The tolerances on the face-to-face and centre-to-face dimensions detailed in Table 2 shall be as follows 4 1 bar 105 102 kPa. 1234567 Nominal pressure PN For flanged end valves only BS 4504 table number Maximum permissible gauge working pressures at temperatures C of – 10 to 120150180200220 barabarabarabarabara 66/1165.6 1010/11109.28.58.08.0 1616/111614.813.913.013.0 2525/112523.021.220.019.0 NOTEIntermediate values may be obtained by linear interpolation. a 1 bar 105 N/m2 102 kPa. Face-to-face or centre-to-face dimensionsTolerance mmmm Above0 up to and including200 1 Above200 up to and including400 2 Above400 up to and including600 3 Above600 up to and including800 4 Above800 up to and including 1 000 5 Above 1 000 up to and including 1 600 6 Above 1 600 up to and including 2 250 8 Licensed Copy Jacobs user, Jacobs Engineering, Tue Mar 27 084634 GMT0000 2007, Uncontrolled Copy, c BSI BS 51531974 BSI 05-19993 9 Screwed body ends Screwed body ends shall have female threads complying with the requirements of BS 21 either taper or parallel at the manufacturer’s option unless the particular is specified in the purchase order. 9.1 End faces of parallel threaded valves shall have a smooth finish at right angles to the thread axis. The minimum outside diameters of sealing faces shall be in accordance with Table 3. 9.2 Other s of thread may be provided as specified by the purchaser. 9.3 Body ends shall be of appropriate shape to facilitate tightening. Table 2 Face-to-face and centre-to-face dimensions 12345678910 Nominal size DN Face-to-face dimensions of straight pattern valves for nominal pressure of Centre-to-face dimensions of angle pattern valves for nominal pressure of swing typelift typelift type PN 6, PN 10, PN 16PN 25PN 10, PN 16PN 25PN 10, PN 16PN 25 shortlongshortlongshortlong mmmmmmmmmmmmmmmmmm 101301301301308585 151301301301309090 201501501501509595 25160160160160100100 32180180180180 105105 4016520020016520020082a115115 50203230230203230230102a125125 65216290290216290290108a145145 80241310310241310310121a155155 100292350350292350350146175175 125330400400330400400165200200 150356480480356480480178225225 200495600600495600600248275275 250622730730622730730311325325 300698850850698850850350375375 350787980980787980980394425425 4009141 1001 1009141 1001 100457475475 4509651 2001 2009651 2001 200483500500 5001 0671 2501 250 6001 2191 450 7001 650 8001 850 9002 050 1 0002 250 a These values for DN 40 to DN 80 are not suitable for use with BS 4504 flanges and are included only for use with ANSI Class 125 flanges which are the subject of Appendix A. Licensed Copy Jacobs user, Jacobs Engineering, Tue Mar 27 084634 GMT0000 2007, Uncontrolled Copy, c BSI BS 51531974 4 BSI 05-1999 Table 3 Minimum outside diameters of sealing faces for parallel threaded valves Section 3. Design and manufacture 10 Bodies 10.1 Body end ports. The body end ports shall be circular. Table 4 gives approximate values, for guidance only, for the bore dimensions at the body end ports of flanged valves. 10.2 Seat bores. Seat bores shall be circular and not less than the dimensions given in Table 4 but any lugs required to facilitate the fitting of seat rings may intrude into the bore. In the case of lift check valves the bore may be reduced by the minimum extent necessary to permit the use of plug type disks, disks guided from below or special proprietary designs. 10.3 Flow way area. The area of the flow way between the body end ports shall be not less than the area of a circle of which the diameter is the bore dimension given in Table 4 except that this area may be reduced by not more than 15 for PN 10 and PN 16 “short” lift check valves. Table 4 Dimensions of body end ports and seat bores 12 Thread