ASTMA557

Global Marketing for Tube Pipeww.Tubesdution.comASTM A557-88/ASME SA557 ELECTRIC RESISTANCE WELDED CARBON STEEL FEEDW ATER HEATER TUBESThis standard is issued under the fied designation A 557/A557M;the number immediately following the designation indicates the year of original adoption or,in the case ofrevision,the year of last revision.A number in parentheses indicates the year of last reapproval.A superscript epsillon (2)indicates an edtoral change since the ast revision orreapproval.1.Scope1.1 This specification covers minimum-wall-thickness,electric-resistance-welded,carbon steel tubes indusion those bent,if specified,into the from of U-tubes for applcation intubuar feedwater heaters.1.2 the tubing sizes covered shall be 5/8 to 1 1/4-in.[15.9 to 31.8-mm]outside diameter,indusive,with minimum wall thickness equal to or greater than 0.045 in.[1.1 mm].1.3 optional supplementary requirements are provided,and hen desired,shall be stated in the order.1.4 The values stared in either nch-pound units or SI units are to be regarded separately as the standard.withinthe text,the SI units are shown inbrackets.The values sated ineach system are not exact equivalents;therefore,each system must be used independently of the other.Combining values from the two systems may result in nonconformancewith the spedification.The inch-pound units shall apply unless the"M"designation of this specification is spedified in the order.JIS Number and Corresponding Foreign StandardssSTMDIN1sOnderk由dSardardSandardStardardSandardSanerdGadepeGradepeGGradeeGradeGnadeumbeumoerumberumber63佑15正0A1613059HFST0M9-245TSMecoo5E5】A1923530s宝4cA226究W30A5563A2Ew320A5573A位513605拉360RM3600360p606究W30E320050