1、Pipe Flanges and Flanged Fittings NPS Through NPS 24 Metric/Inch StandardAN AM E R ICAN NAT IO NAL STANDARDASME B16.5-2020(Revision of ASME B16.5-2017)ASME B16.5-2020(Revision of ASME B16.5-2017)Pipe Flanges andFlanged FittingsxNPS12Through NPS 24Metric/Inch StandardAN AMERICAN NATIONAL STANDARDxDat
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11、rights reservedPrinted in U.S.A.CONTENTSForeword.viiiCommittee Roster.xCorrespondence With the B16 Committee.xiSummary of Changes.xiiiList of Changes in Record Number Order.xvi1General.12PressureTemperature Ratings.23Component Size.34Marking.45Materials.46Dimensions.87Tolerances.138Pressure Testing.
12、14Mandatory AppendicesIThreading of Pipe for American National Standard Threaded Flanges.189IIReferences.191Nonmandatory AppendicesAMethod Used for Establishing PressureTemperature Ratings.194BLimiting Dimensions of Gaskets Other Than Ring Joint Gaskets.198CMethod for Calculating Bolt Lengths.200DQu
13、ality System Program.202EDimensions of Classes 400,600,900,1500,and 2500 Flanged Fittings in U.S.Customary Units203FMethod Used to Establish SI Unit Values.231Figures1Bevel for Outside Thickness.152Bevel for Inside Thickness.153Bevel for Combined Thickness.154Straight Hub Welding Flanges.155Method o
14、f Designating Outlets of Reducing Fittings in Specifications(Flanged Fittings).166EndFlangeFacingsandTheirRelationshiptoFlangeThicknessandCenter-to-EndandEnd-to-EndDimensions.177WeldingNeckFlangeHubandWeldingEndProfilesforWallThicknessestFrom5mm(0.19in.)to22 mm(0.88 in.).198Welding Neck Flange Hub a
15、nd Welding End Profiles for Wall Thicknesses t Greater Than 22 mm(0.88 in.).20iii9Inside Contour for Use With Rectangular Backing Ring.2110Inside Contour for Use With Taper Backing Ring.2111Thread Length for Connection Tapping.2212Socket Welding for Connections.2213Bosses for Connections.2214Butt We
16、lding for Connections.2215Method of Designating Location of Auxiliary Connections When Specified(Flanged Fittings).23C-1Specified Machine Bolt Length.200C-2Specified Stud Bolt Length.200Tables1.1-1List of Material Specifications.51.1-2List of Bolting Specifications:Applicable ASTM Specifications.91.1-3Flange Bolting Dimensional Recommendations.122-1.1PressureTemperature Ratings for Group 1.1 Materials.242-1.1CPressureTemperature Ratings for Group 1.1 Materials.252-1.2PressureTemperature Ratings