ASME-ANSI-B16.28-Wrought-steel-butt-welding-short-radius-elbows-and-returns

HEBEI HAIHAO GROUPISO,ABS,CE/PED APPROVEDMengcun,Cangzhou,Hebei,ChinaProfessional Steel Piping SolutionHAIHAO GROUPwww.haihaopiping.comEmail:sales@haihaogroup.comANSI B16.28-Wrought Steel Butt-Welding ShortRadius Elbows And Returns.B16.28 standard is about the short radius elbows,includes the infommation of general scope,design andpressure ratings,Sizes,Markings,Materials,Dimensions,End preparations,Production Test,Design prooftest and Tolerance.Tolerance information.unit in inch.TABLE 1 TOLERANCES90 degAll FittingsElbows180 deg ReturnsOutsideInsideCenter-to-Center-to-Back-to-NominalDiameterDiameterWallAngularityEndCenterFaceAlignmentsPipeat Bevelat EndThicknessOff Angle Off Plane DimensionDimensionDimensionof EndsSize[Notes(1l,(2】Notes(1,3l.4月][Note(3]QPA00+0.060.030.030.060.060,250.250.03V to 2%-0.033 to 3%0.060.060.030.060.060.250.250.0340.060.060.030.060.060.250.250.03+0.095 to 80.06Not less0.060.120.060.250.250.03-0.06than87.5%+0.16of nom-10to120.090.190.090.380.250.06-0.120.12inalthick-14to16+0.16ness-0.120.120.090.250.090.380.250.06markedon18+0.160.12fitting0.120.380.090.380.250.06-0.1220to24+0.250.190.120.380.090.380.250.06-0.19GENERAL NOTE:Dimensions are in inches.Tolerances are equal plus and minus except as noted.NOTES:(1)Out-of-round is the sum of absolute values of plus and minus tolerance.(2)This tolerance may be axceeded in localized areas of formed fittings where increased wall thickness is required to meet designrequirements of para.2.1.(3)The inside diameter and the nominal wall thicknesses at ends are to be specified by the purchaser.Wall thickness toleranceapplies throughout the fitting.(4)Unless otherwise specified by the purchaser,these tolerances apply to the nominal inside diameter,which equals the differencebetween the nominal outside diameter and twice the nominal wall thickness.