[www.staffempire.com]-BS 1868-1975(R1990) Steel check valves(flanged and butt-welding ends) for the petroleum,petrochemical and allied industries.pdf

BRITISH STANDARDBS 1868:1975Reprinted,incorporating Amendment No.1Specification forSteel check valves(flanged andbutt-welding ends)for the petroleum,petrochemical and allied industriesUDC 665.6:621.646.248:669.14COPYRIGHT 2003;British Standards Institution on ERC Specs and Standards Document provided by IHS Licensee=Qatar Petroleum/5943408104,User=,05/05/200301:47:07 MDT Questions or comments about this message:please call the DocumentPolicy Management Group at 1-800-451-1584.-,-,-BS 1868:1975This British Standard,having been approved by thePetroleum Equipment Industry Standards Committee,was published under the authority of the Executive Board on28 November 1975 BSI 02-1999First published,June 1952First revision,March 1960Second revision,November 1975The following BSI references relate to the work on this standard:Committee reference PEE/1 Draft for comment 74/74150 DCISBN 0 580 08817 0Co-operating organizationsThe Petroleum Equipment Industry Standards Committee,under whose supervision this British Standard was prepared,consists of representatives from the following Government department and scientific and industrial organizations:British Gas CorporationBritish Mechanical Engineering ConfederationBritish Rubber Manufacturers Association Ltd.British Steel Industry*Council of British Manufacturers of Petroleum Equipment*Department of EnergyOil Companies Materials Association*The industrial 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 standard:Association of Hydraulic Equipment ManufacturersBritish Chemical Engineering Contractors AssociationBritish Industrial Measuring and Control Apparatus Manufacturers AssociationBritish Plastics FederationBritish Ship Research AssociationBritish Valve Manufacturers AssociationEngineering Equipment Users AssociationSteel Castings AssociationAmendments issued since publicationAmd.No.Date of issueComments6563July 1990Indicated by a sideline in the marginCOPYRIGHT 2003;British Standards Institution on ERC Specs and Standards Document provided by IHS Licensee=Qatar Petroleum/5943408104,User=,05/05/200301:47:07 MDT Questions or comments about this message:please call the DocumentPolicy Management Group at 1-800-451-1584.-,-,-标准分享网 w w w.b z f x w.c o m 免费下载BS 1868:1975 BSI 02-1999iContents PageCo-operating organizations Inside front coverForeword iiSection 1.General1Scope 12References 13Definitions 14Pressure classification 15Pressure/temperature ratings 16Nominal sizes 17Information to be supplied by the purchaser 2Section 2.Design8Body 29Cover 510Disk,piston or ball 511Piston and ball guides 512Hinge and hinge pin(swing type)and spindle support cage(disk type)513Special fitments 614Cover bolting 615Soft seal ring 6Section 3.Materials16Shell 617Body seat ring 618Body/cover gasket and pipe plug gasket 619Disk,piston or ball 720Trim 721Hinge(swing type)and spindle support cage(disk type)722Plug 723Cover bolting 724Nameplate 725Soft seal ring 726Special fitments 727Special applications 8Section 4.Marking28Required markings 1029Body and nameplate markings 1030Cover marking 1031Body marking 1032Direction of flow 1033Nameplate marking 1034Additional markings 1135Omission of markings 11Section 5.Testing36Production pressure testing 11COPYRIGHT 2003;British Standards Institution on ERC Specs and Standards Document provided by IHS Licensee=Qatar Petroleum/5943408104,User=,05/05/200301:47:07 MDT Questions or comments about this message:please call the DocumentPolicy Management Group at 1-800-451-1584.-,-,-BS 1868:1975ii BSI 02-1999PageSection 6.Shipping37Preliminary 1138Preparation for despatch 1139Packaging 12Appendix A Application to piping systems with BS 4504-1 flanges 20Figure 1 Swing type check valves 13Figure 2 Piston type check valves 15Figure 3 Ball type check valves 16Figure 4 Ball type check valve 17Figure 5 Disk type check valves 18Figure 6 Butt-welding ends 19Table 1 Dimensions of check valves 4Table 2 Trim materials,hardness and acceptable specifications 9Table 2(a)Test durations11Table 3 Nominal pressure and class ratings and nominal size range 20Table 4 Table deleted 22Publications referred toInside back coverCOPYRIGHT 2003;British Standards Institution on ERC Specs and Standards Document provided by IHS Licensee=Qatar Petroleum/5943408104,User=,05/05/200301:47:07 MDT Questions or comments about this message:please call the DocumentPolicy Management Group at 1-800-451-1584.-,-,-标准分享网 w w w.b z f x w.c o m 免费下载BS 1868:1975 BSI 02-1999iiiForewordThis British Standard is one of a series prepared under the authority of the Petroleum Equipment Industry Standards Committee.It was first published in 1952 when materials referred to in it were described by reference to ASTM specifications.In 1960 a revision of BS 1868 was published in order to bring it into alignment with the 1958 editions of BS 1501 to BS 1506 and BS 1560.This edition is the metric version of BS 1868,and wherever possible metric dimensions and references are given.The recognized metric nominal piping sizes have been used.The previous sections dealing with test have not been included in this standard as these are now the subject of a separate standard BS 6755“Testing of valves.Part 1.Specification for production pressure testing requirements”.NOTERequirements for final inspection and supplementary inspection at all stages of manufacture,previously specified in BS 5146-1:1974(now withdrawn)should be stated by the purchaser in his enquiry or order.Disk type and angle pattern valves and butt-welding end versions of all types have been added and the range has been extended to incorporate larger sizes.The face-to-face and end-to-end dimensions of valves complying with the requirements of this standard,where applicable,are in accordance with ANSI B16-10 but are not now included here,as these are in BS 2080“Specification for face-to-face,centre-to-face,end-to-end and centre-to-end dimensions of flanged and butt-welding end steel valves for the petroleum,petrochemical and allied industries”.End flanges are in accordance with BS 1560-2(which corresponds to ANSI B16-5)and butt-welding ends are in accordance with ANSI B16-25.NOTEUser requirements for valves generally in accordance with this standard,but suitable for use in piping systems with flanges complying with the requirements of BS 4504-1,are dealt with in appendix A.The range of shell materials has been extended to align with the latest edition of BS 1560-2;also the range of materials for the trim and other components has been extended.This standard does not cover valves suitable for the passage of spheres or pig scrapers.It is drawn to the readers attention that at the time of publication of this standard proposals are under discussion in CEN/WG74,“Flanges”,effectively recommending that the use of BS 4504(DIN)flanges be limited to 40 bar maximum ratings.Such proposals may possibly result in the publication of a European Standard.Acknowledgement is made to the American Petroleum Institute and to the American National Standards Institute for data used.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 pagesThis document comprises a front cover,an inside front cover,pages i to iv,pages 1 to 20,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.COPYRIGHT 2003;British Standards Institution on ERC Specs and Standards Document provided by IHS Licensee=Qatar Petroleum/5943408104,User=,05/05/200301:47:07 MDT Questions or comments about this message:please call the DocumentPolicy Management Group at 1-800-451-1584.-,-,-ivblankCOPYRIGHT 2003;British Standards Institution on ERC Specs and Standards Document provided by IHS Licensee=Qatar Petroleum/5943408104,User=,05/05/200301:47:07 MDT Questions or comments about this message:please call the DocumentPolicy Management Group at 1-800-451-1584.-,-,-标准分享网 w w w.b z f x w.c o m 免费下载BS 1868:1975 BSI 02-19991Section 1.General1 ScopeThis British Standard specifies requirements for cast or forged steel check valves with flanged or butt-welding ends of the following types:a)swing,for vertical or horizontal flow(see Figure 1);b)lift:i)piston type,for angle or horizontal flow(see Figure 2);ii)ball type,for angle or horizontal flow(see Figure 3);iii)ball type,for vertical flow(see Figure 4);iv)disk type,for vertical flow(see Figure 5).The terms“vertical”,“horizontal”and“angle”relate to the axes of the body ends.When swing check valves are used in vertical lines the flow must be in an upward direction.For the purposes of this standard any line with a slope(upward or downward)of 5 or less is deemed to be horizontal.In the case of angle pattern valves the inlet should be vertical.2 ReferencesThe titles of the British Standards referred to in this standard are listed on the inside back cover.3 Definitionsnominal size the nominal size(DN)is a numerical designation of size that is common to all components in a piping system other than those using valves,fittings,couplings or tubes that are designated by the outside diameter.It is a convenient round number for reference purposes and is normally only loosely related to manufacturing dimensions4 Pressure classificationThis standard applies to valves of the following class designations:Classes 150,300,400,600,900,1 500 and 2 500.The numerals in these class designations represent the primary pressure ratings of the valves in pounds force per square inch.5 Pressure/temperature ratingsThe pressure/temperature ratings applicable to valves covered by this standard shall be in accordance with tables PE 1 to PE 12 as listed in BS 1560-2 for the particular shell material specified.There is,however,a temperature restriction on certain trim materials and soft seal ring(see clause 15 and 20.4).If valves complying with the requirements of this standard are to be used at service temperaturesbelow 30 C,reference should be made to BS 3351.(“Service temperature”refers to the temperature of the fluid in the line at the valve.)6 Nominal sizesThis standard covers valves of the following nominal sizes.mminmminmminmmin15 20253240()()(1)(1)a(1)50 6580100150(2)(2)a(3)(4)(6)200250300350400(8)(10)(12)(14)(16)450 500600(18)(20)(24)For each valve class and type,the range of sizes covered by this standard is shown in Table 1.a These sizes have been retained only for the purpose of replacing existing valves.Their use for new construction in piping systems using end flanges complying with the requirements of BS 1560-2 should be avoided.COPYRIGHT 2003;British Standards Institution on ERC Specs and Standards Document provided by IHS Licensee=Qatar Petroleum/5943408104,User=,05/05/200301:47:07 MDT Questions or comments about this message:please call the DocumentPolicy Management Group at 1-800-451-1584.-,-,-BS 1868:19752 BSI 02-19997 Information to be supplied by the purchaserCertain clauses of this standard permit alternatives.If the purchaser requires features that depart from the requirements of this standard,he shall state the following in his enquiry and purchase order:a)type class and nominal size.In the case of piston,ball and disk types types i),ii)and iv),state whether vertical,horizontal or angle pattern is required(see clauses 1,4,5 and 6).b)whether flanged or butt-welding ends are required:1)if flanged ends are required,state whether welded-on flanges are acceptable(see 8.6)and the type of facing(see 8.7);2)if butt-welding ends are required,state the pipe schedule number or wall thickness and outside diameter(see 8.8);c)whether shell tappings are required and,if so,the location and the type of thread if other than API Standard 5B(see 8.10);d)whether a loading spring is required(see clause 13);e)whether a locking ring is required for the hinge pin plug(see clause 12);f)whether an outside attachment is required;also if a non-slam or damping device is required(see clause 13);g)whether soft seals are required and if so,whether these are required to be in disk seats or body seats(see clause 15);h)the shell material(see clause 16);i)the nominal trim material symbol(see clause 20);j)material for cover bolting,if required for operation at process design temperatures below 30 C or above 480 C,or for other special operating conditions(see clause 23);k)whether any special packing is required for outside lever hinge pin;or the packing design temperature if above 400 C(see 26.1.2);l)special material requirements for valves in highly corrosive services or environment or for low temperature service(see clause 27);m)whether any additional markings are required(see clause 34);n)if a lower seat test leakage rate is required for metal seated valves(see clause 36);o)requirements for special packaging(see clause 39).Section 2.Design8 Body8.1 The body design criteria specified in 8.2 to 8.11 shall be observed.8.2 The body shall be designed to minimize pressure loss as well as corrosive and erosive effects.The body end port shall be circular.8.3 In the case of swing type and combined horizontal and vertical ball type valves,the full port area shall be maintained without pockets from the inlet port to the valve seat to avoid turbulence.On the outlet side of the valve seat of swing type valves,the body shall be of such proportions that it allows sufficient swing of the disk to give a flow area at least equivalent to full port area.8.4 The wall thickness of the body shall conform to the thickness as given in Table 1.Drilling of,or pinning to,the wall of a pressure-containing part,e.g.for nameplate fixing,is not permissible where such drilling or pinning would reduce the effective thickness below the minimum permitted value.8.5 Face-to-face and centre-to-face dimensions for raised face flange end valves and end-to-end and centre-to-end dimensions for butt-welding end and ring-joint flange and valves shall conform to the dimensions specified in BS 2080.COPYRIGHT 2003;British Standards Institution on ERC Specs and Standards Document provided by IHS Licensee=Qatar Petroleum/5943408104,User=,05/05/200301:47:07 MDT Questions or comments about this message:please call the DocumentPolicy Management Group at 1-800-451-1584.-,-,-标准分享网 w w w.b z f x w.c o m 免费下载BS 1868:1975 BSI 02-199938.6 End flanges shall be cast or forged integral with the body except that flanges may be attached by welding if so specified in the purchase order.The welds of end flanges attached by butt-welding shall comply with the requirements of BS 3351 and shall have any necessary heat treatment as required by BS 3351 to ensure that they are suitable for service temperatures down to 30 C.Flange attachment by