ASTM A312/A312M-22

Standard Specification for Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes

ABSTRACT
This guide covers standard specification for seamless, straight-seam welded, and cold worked welded austenitic stainless steel pipe intended for high-temperature and general corrosive service. Several grades of steel shall conform to the required chemical composition for carbon, manganese, phosphorus, sulfur, silicon, chromium, nickel, molybdenum, titanium, columbium, tantalum, nitrogen, vanadium, copper, cerium, boron, aluminum, and others. All pipes shall be furnished in the heat-treated condition in accordance with the required heat treating temperature and cooling/testing requirements. Tensile properties of the material shall conform to the prescribed tensile strength and yield strength. The steel pipe shall undergo mechanical tests such as transverse or longitudinal tension test and flattening test. Grain size determination and weld decay tests shall be performed. Each pipe shall also be subjected to the nondestructive electric test or the hydrostatic test.
SCOPE
1.1 This specification2 covers seamless, straight-seam welded, and heavily cold worked welded austenitic stainless steel pipe intended for high-temperature and general corrosive service.  
1.2 Grades TP304H, TP309H, TP309HCb, TP310H, TP310HCb, TP316H, TP321H, TP347H, and TP348H are modifications of Grades TP304, TP309Cb, TP309S, TP310Cb, TP310S, TP316, TP321, TP347, and TP348, and are intended for service at temperatures where creep and stress rupture properties are important.  
1.3 Optional supplementary requirements are provided for pipe where a greater degree of testing is desired. These supplementary requirements call for additional tests to be made and, when desired, it is permitted to specify in the order one or more of these supplementary requirements.  
1.4 Table X1.1 lists the standardized dimensions of welded and seamless stainless steel pipe as shown in ASME B36.19. These dimensions are also applicable to heavily cold worked pipe. Pipe having other dimensions is permitted to be ordered and furnished provided such pipe complies with all other requirements of this specification.  
1.5 Grades TP321 and TP321H have lower strength requirements for pipe manufactured by the seamless process in nominal wall thicknesses greater than 3/8 in. [9.5 mm].  
1.6 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.”  
1.7 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.

General Information

• Status: Historical
• Publication Date: 30-Apr-2022
• ICS: 23.040.10 - Iron and steel pipes
• Technical Committee: A01 - Steel, Stainless Steel and Related Alloys
• Drafting Committee: A01.10 - Stainless and Alloy Steel Tubular Products

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:A312/A312M −22 Used in USDOE-NE standards
Standard Specification for
Seamless, Welded, and Heavily Cold Worked Austenitic
1
Stainless Steel Pipes
This standard is issued under the fixed designationA312/A312M; 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 parentheses indicates the year of last reapproval.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
NOTE 1—The dimensionless designator NPS (nominal pipe size) has
1. Scope*
been substituted in this standard for such traditional terms as “nominal
2
1.1 This specification covers seamless, straight-seam
diameter,” “size,” and “nominal size.”
welded, and heavily cold worked welded austenitic stainless
1.7 This international standard was developed in accor-
steel pipe intended for high-temperature and general corrosive
dance with internationally recognized principles on standard-
service.
ization established in the Decision on Principles for the
1.2 Grades TP304H, TP309H, TP309HCb, TP310H,
Development of International Standards, Guides and Recom-
TP310HCb, TP316H, TP321H, TP347H, and TP348H are
mendations issued by the World Trade Organization Technical
modifications of Grades TP304, TP309Cb, TP309S, TP310Cb,
Barriers to Trade (TBT) Committee.
TP310S, TP316, TP321, TP347, and TP348, and are intended
for service at temperatures where creep and stress rupture
2. Referenced Documents
properties are important.
3
2.1 ASTM Standards:
1.3 Optional supplementary requirements are provided for
A262 Practices for Detecting Susceptibility to Intergranular
pipe where a greater degree of testing is desired. These
Attack in Austenitic Stainless Steels
supplementaryrequirementscallforadditionalteststobemade
A370 Test Methods and Definitions for Mechanical Testing
and, when desired, it is permitted to specify in the order one or
more of these supplementary requirements. of Steel Products
A941 TerminologyRelatingtoSteel,StainlessSteel,Related
1.4 Table X1.1 lists the standardized dimensions of welded
Alloys, and Ferroalloys
and seamless stainless steel pipe as shown in ASME B36.19.
A999/A999M Specification for General Requirements for
These dimensions are also applicable to heavily cold worked
Alloy and Stainless Steel Pipe
pipe. Pipe having other dimensions is permitted to be ordered
A1016/A1016M Specification for General Requirements for
and furnished provided such pipe complies with all other
Ferritic Alloy Steel, Austenitic Alloy Steel, and Stainless
requirements of this specification.
Steel Tubes
1.5 GradesTP321andTP321Hhavelowerstrengthrequire-
E112 Test Methods for Determining Average Grain Size
ments for pipe manufactured by the seamless process in
E381 Method of Macroetch Testing Steel Bars, Billets,
3
nominal wall thicknesses greater than ⁄8 in. [9.5 mm].
Blooms, and Forgings
1.6 The values stated in either SI units or inch-pound units
E527 Practice for Numbering Metals and Alloys in the
are to be regarded separately as standard. Within the text, the
Unified Numbering System (UNS)
SI units are shown in brackets. The values stated in each
2.2 ASME Standards:
system may not be exact equivalents; therefore, each system
B1.20.1 Pipe Threads, General Purpose
shall be used independently of the other. Combining values
B36.10M Welded and Seamless Wrought Steel Pipe
from the two systems may result in non-conformance with the
B36.19 Stainless Steel Pipe
standard. The inch-pound units shall apply unless the “M”
4
ASME Boiler and Pressure Vessel Code : Section VIII
designation of this specification is specified in the order.
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
3
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee For referenced ASTM standards, visit the ASTM website, www.astm.org, or
A01.10 on Stainless and Alloy Steel Tubular Products. contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Current edition approved May 1, 2022. Published June 2022. Originally Standards volume information, refer to the standard’s Document Summary page on
approved in 1948. Last previous edition approved in 2021 as A312/A312M – 21. the ASTM website.
4
DOI: 10.1520/A0312_A0312M-22. Available from American Society of Mechanical Engineers (ASME), ASME
2
For ASME Boiler and Pressure Vessel Code applications see related Specifi- International Headquarters, Two Park Ave., New York, NY 10016-5990, http://
cation SA-312 in Section II of that Code. www.asme.org.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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A31
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: A312/A312M − 21 A312/A312M − 22 Used in USDOE-NE standards
Standard Specification for
Seamless, Welded, and Heavily Cold Worked Austenitic
1
Stainless Steel Pipes
This standard is issued under the fixed designation A312/A312M; 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 parentheses indicates the year of last reapproval.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope*
2
1.1 This specification covers seamless, straight-seam welded, and heavily cold worked welded austenitic stainless steel pipe
intended for high-temperature and general corrosive service.
NOTE 1—When the impact test criterion for a low-temperature service would be 15 ft·lbf [20 J] energy absorption or 15 mils [0.38 mm] lateral expansion,
some of the austenitic stainless steel grades covered by this specification are accepted by certain pressure vessel or piping codes without the necessity
of making the actual test. For example, Grades TP304, TP304L, and TP347 are accepted by the ASME Pressure Vessel Code, Section VIII Division 1,
and by the Chemical Plant and Refinery Piping Code, ASME B31.3, for service at temperatures as low as −425 °F [−250 °C] without qualification by
impact tests. Other AISI stainless steel grades are usually accepted for service temperatures as low as −325 °F [−200 °C] without impact testing. Impact
testing may, under certain circumstances, be required. For example, materials with chromium or nickel content outside the AISI ranges, and for material
with carbon content exceeding 0.10 %, are required to be impact tested under the rules of ASME Section VIII Division 1 when service temperatures are
lower than −50 °F [−45 °C].
1.2 Grades TP304H, TP309H, TP309HCb, TP310H, TP310HCb, TP316H, TP321H, TP347H, and TP348H are modifications of
Grades TP304, TP309Cb, TP309S, TP310Cb, TP310S, TP316, TP321, TP347, and TP348, and are intended for service at
temperatures where creep and stress rupture properties are important.
1.3 Optional supplementary requirements are provided for pipe where a greater degree of testing is desired. These supplementary
requirements call for additional tests to be made and, when desired, it is permitted to specify in the order one or more of these
supplementary requirements.
1.4 Table X1.1 lists the standardized dimensions of welded and seamless stainless steel pipe as shown in ASME B36.19. These
dimensions are also applicable to heavily cold worked pipe. Pipe having other dimensions is permitted to be ordered and furnished
provided such pipe complies with all other requirements of this specification.
1.5 Grades TP321 and TP321H have lower strength requirements for pipe manufactured by the seamless process in nominal wall
3
thicknesses greater than ⁄8 in. [9.5 mm].
1.6 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.
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel, Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee A01.10
on Stainless and Alloy Steel Tubular Products.
Current edition approved May 1, 2021May 1, 2022. Published May 2021June 2022. Originally approved in 1948. Last previous edition approved in 20192021 as
A312/A312M – 19.A312/A312M – 21. DOI: 10.1520/A0312_A0312M-21.10.1520/A0312_A0312M-22.
2
For ASME Boiler and Pressure Vessel Code applications see related Specification SA-312 in Section II of that Code.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
A312/A312M − 22
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.”
1.7 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development
...