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    ASTM A790 / A790M - 20

    Standard Specification for Seamless and Welded Ferritic/Austenitic Stainless Steel Pipe

    Active Standard ASTM A790 / A790M | Developed by Subcommittee: A01.10

    Book of Standards Volume: 01.01

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    Abstract

    The specification covers seamless and straight-seam welded ferritic/austenitic steel pipe for general corrosive service, with particular emphasis on resistance to stress corrosion cracking. The pipe shall be made by the seamless or an automatic welding process, with no addition of filler metal in the welding operation. Heat analysis shall be made to determine the percentages of the elements specified. Tension tests, hardening tests, flattening tests, hydrostatic tests and nondestructive electric tests shall be made to conform to the specified requirements.

    This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

    1. Scope

    1.1 This specification2 covers seamless and straight-seam welded ferritic/austenitic steel pipe intended for general corrosive service, with particular emphasis on resistance to stress corrosion cracking. These steels are susceptible to embrittlement if used for prolonged periods at elevated temperatures.

    1.2 Optional supplementary requirements are provided for pipe when a greater degree of testing is desired. These supplementary requirements call for additional tests to be made and, when desired, one or more of these may be specified in the order.

    1.3 Appendix X1 of this specification lists the dimensions of welded and seamless stainless steel pipe as shown in ANSI B36.19. Pipe having other dimensions may be furnished provided such pipe complies with all other requirements of this specification.

    1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. 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 two systems may result in non-conformance with the standard. The inch-pound units shall apply unless the M designation of this specification is specified in the order.

    Note 1: The dimensionless designator NPS (nominal pipe size) has been substituted in this standard for such traditional terms as nominal diameter, size, and nominal size.

    1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    A370 Test Methods and Definitions for Mechanical Testing of Steel Products

    A923 Test Methods for Detecting Detrimental Intermetallic Phase in Duplex Austenitic/Ferritic Stainless Steels

    A941 Terminology Relating to Steel, Stainless Steel, Related Alloys, and Ferroalloys

    A999/A999M Specification for General Requirements for Alloy and Stainless Steel Pipe

    E213 Practice for Ultrasonic Testing of Metal Pipe and Tubing

    E309 Practice for Eddy Current Examination of Steel Tubular Products Using Magnetic Saturation

    E381 Method of Macroetch Testing Steel Bars, Billets, Blooms, and Forgings

    E426 Practice for Electromagnetic (Eddy Current) Examination of Seamless and Welded Tubular Products, Titanium, Austenitic Stainless Steel and Similar Alloys

    E527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)

    Other Standard

    SNT-TC-1A Personal Qualification and Certification in Nondestructive Testing

    SAE Standard

    SAE J 1086

    ANSI Standards

    B1.20.1 Pipe Threads, General Purpose

    B36.10 Welded and Seamless Wrought Steel Pipe

    ICS Code

    ICS Number Code 23.040.10 (Iron and steel pipes)

    UNSPSC Code

    UNSPSC Code 40171522(Commercial seamless stainless steel pipe); 40171521(Commercial welded stainless steel pipe)

    Referencing This Standard
    Link Here
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    DOI: 10.1520/A0790_A0790M-20

    Citation Format

    ASTM A790 / A790M-20, Standard Specification for Seamless and Welded Ferritic/Austenitic Stainless Steel Pipe, ASTM International, West Conshohocken, PA, 2020, www.astm.org

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