BS-4504-Standard-Flanges-Dimensions-and-Tolerances参考标准规范

HEBEI HAIHAO GROUPISO.ABS.CE/PED APPROVEDHHMengcun,Cangzhou,Hebei,ChinaProfessional Steel Piping SolutionHAIHAO GROUPwww.haihaopiping.comEmail:sales@haihaogroup.comBS 4504 Circular Flanges-GeneralDimensions and TolerancesDimensionRangeTolerancemmDN1002.02mm+0,-1.03 mm0.-2.0a(type B facing height)4 mm+0.3.05mm+0.-4.0Flange Facings6mm+0.-5.0(see page 8-63)b(type C and Efacing height)All+0.5.-0b(type G facing height)All+0,-0.5b(type H facing height,outer)All+0.2.-0c(type D and F facing height)All+0.-0.5d(type H facing height,inner)All+0.5.-0B and E(facing diameters)All+0.-0.5C and D (facing diameters)All+0.5.-0All,turningRa 3.2 um minFacing types A,B,E and F12.5山mmaxSurface FinishAll,other than turningRa=3.2μmmin6.3um maxFacing types C,D,G and HAllRa 0.8 um min3.2 um maxBolt sizes M10 to M240.9Flange DrillingB(diameter of bolt circle)Bolt sizes M27 to M45Details±1.4(see page 8-64)Centre to centre of adjacent bolt holesBolt sizes M10 to M240.45Bolt sizes M27 to M45±0.7≤DN1502.0>DN150DN500≤DN12005.0>DN1200≤DN1800±7.0>DN180010.0≤18 nm thickness±1.0AllC(flange thickness,machined on both faces)>18mm<50mmthickness±1.0>50 mm thickness±1.0≤18 mm thickness+2.0.-1.0C(flange thickness,machined on front face)>18mm<50mmthickness+4.0,-1.5>50 mm thickness+7.0,-2.0DN125DN1200+6.0.-0≤DN500,2.0Weld Neck>DN50≤DN150+0,4.0Flanges.Code 111(see page 8-66)F(hub diameter)>DN150DN300≤DN600+0,-8.0>DN600DN80DN250±3.0≤DN50+1.0,-0>DN50DN150DN300DN600DN1200DN1800+20.0.-0(see page 8-69)≤DN100+0.5.0Flanges>DN100DN400≤DN600+.5,.0>DN600+3.0.-0D(length through hub)Same as Weld Neck DBlank FlangesB(flange thickness)】Same as C for all other flangesCode 105(see page 8-70)C(unmachined centre portion)Maximum specified