An American National Standard
Standard Speciﬁcation for
Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless1
This standard is issued under the ﬁxed designation A 53/A 53M; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. A number in parenthesesindicates the year of last reapproval. A superscript epsilon (e) indicates an editorial change since the last revision or reapproval. This standard has been approved for use by agencies of the Department of Defense.
1. Scope 1.1 This speciﬁcation2 covers seamless and welded black and hot-dipped galvanized steel pipe in NPS 1⁄8 to NPS 26 [DN 6 to DN 650] (Note 1), inclusive, with nominal wallthickness (Note 2) as given in Table X2.2 and Table X2.3. It shall be permissible to furnish pipe having other dimensions (Note 2) provided such pipe complies with all other requirements of this speciﬁcation.
NOTE 1—The dimensionless designators NPS (nominal pipe size) [DN (diameter nominal)] have been substituted in this speciﬁcation for such traditional terms as “nominal diameter,” “size,” and“nominal size.” NOTE 2—The term nominal wall thickness has been assigned for the purpose of convenient designation, existing in name only, and is used to distinguish it from the actual wall thickness, which may vary over or under the nominal wall thickness.
1.2 This speciﬁcation covers the following types and grades: 1.2.1 Type F—Furnace-butt welded, continuous welded Grade A, 1.2.2 TypeE—Electric-resistance welded, Grades A and B, and 1.2.3 Type S—Seamless, Grades A and B.
NOTE 3—See Appendix X1 for deﬁnitions of types of pipe.
1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the twosystems may result in non-conformance with the standard. 1.5 The following precautionary caveat pertains only to the test method portion, Sections 9, 10, 11, 15, 16, and 17 of this speciﬁcation: This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practicesand determine the applicability of regulatory limitations prior to use. 1.6 The text of this speciﬁcation contains notes or footnotes, or both, that provide explanatory material. Such notes and footnotes, excluding those in tables and ﬁgures, do not contain any mandatory requirements. 2. Referenced Documents 2.1 ASTM Standards: A 90/A 90M Test Method for Weight [Mass] of Coating on Iron and SteelArticles with Zinc or Zinc-Alloy Coatings3 A 370 Test Methods and Deﬁnitions for Mechanical Testing of Steel Products4 A 530/A 530M Speciﬁcation for General Requirements for Specialized Carbon and Alloy Steel Pipe5 A 700 Practices for Packaging, Marking, and Loading Methods for Steel Products for Domestic Shipment6 A 751 Test Methods, Practices, and Terminology for Chemical Analysis of SteelProducts4 A 865 Speciﬁcation for Threaded Couplings, Steel, Black or Zinc-Coated (Galvanized) Welded or Seamless, for Use in Steel Pipe Joints5 B 6 Speciﬁcation for Zinc7 E 29 Practice for Using Signiﬁcant Digits in Test Data to Determine Conformance with Speciﬁcations8
1.3 Pipe ordered under this speciﬁcation is intended for mechanical and pressure applications and is also acceptable for ordinaryuses in steam, water, gas, and air lines. It is suitable for welding, and suitable for forming operations involving coiling, bending, and ﬂanging, subject to the following qualiﬁcations: 1.3.1 Type F is not intended for ﬂanging. 1.3.2 When Types S and E are required for close coiling or cold bending, Grade A is the preferred grade. This provision is not intended to prohibit the cold bending...