ASTM A376/A376M-22

Standard Specification for Seamless Austenitic Steel Pipe for High-Temperature Service

ABSTRACT
This specification covers seamless austenitic steel pipe intended for high-temperature central-station service. The grades covered are five H grades and two nitrogen grades. Pipe may be either hot finished or cold finished, with a suitable finishing treatment. All pipes shall be furnished in the heat-treated condition unless the order specifically states that no final heat treatment shall be applied. Tensile tests, hydrostatic test, nondestructive electric tests, ultrasonic tests, eddy-current tests, tension tests, and flattening tests shall be made to conform to the requirements specified.
SCOPE
1.1 This specification2 covers seamless austenitic steel pipe intended for high-temperature service. Among the grades covered are H grades and nitrogen grades that are specifically intended for high-temperature service.
Note 1: This specification was originally developed for use for piping in the central stations of electric-power generating thermal plants. However, its use is not restricted to such applications and it may be used in other applications for which the attributes of the materials, as defined by this specification, are appropriate.  
1.2 Optional supplementary requirements (S1 through S10) are provided. These supplementary requirements specify additional tests that will be made only when stated in the order, together with the number of such tests required.  
1.3 Grades TP321 and TP321H have lower strength requirements for nominal wall thicknesses greater than 3/8 in. [9.5 mm].  
1.4 The values stated in either inch-pound units or SI 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 2: The dimensionless designators NPS (nominal pipe size) and DN (Diametre Nominel) have 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.

General Information

• Status: Published
• Publication Date: 31-Oct-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)

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.
Designation:A376/A376M −22 Used in USDOE-NE standards
Standard Specification for
Seamless Austenitic Steel Pipe for High-Temperature
1
Service
This standard is issued under the fixed designationA376/A376M; 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. Referenced Documents
2 3
1.1 This specification covers seamless austenitic steel pipe 2.1 ASTM Standards:
intended for high-temperature service. Among the grades A262 Practices for Detecting Susceptibility to Intergranular
covered are H grades and nitrogen grades that are specifically Attack in Austenitic Stainless Steels
intended for high-temperature service. A999/A999M Specification for General Requirements for
NOTE 1—This specification was originally developed for use for piping
Alloy and Stainless Steel Pipe
in the central stations of electric-power generating thermal plants.
E112 Test Methods for Determining Average Grain Size
However, its use is not restricted to such applications and it may be used
E213 Practice for Ultrasonic Testing of Metal Pipe and
inotherapplicationsforwhichtheattributesofthematerials,asdefinedby
Tubing
this specification, are appropriate.
E381 Method of Macroetch Testing Steel Bars, Billets,
1.2 Optional supplementary requirements (S1 through S10)
Blooms, and Forgings
are provided. These supplementary requirements specify addi-
E426 Practice for Electromagnetic (Eddy Current) Examina-
tional tests that will be made only when stated in the order,
tion of Seamless and Welded Tubular Products, Titanium,
together with the number of such tests required.
Austenitic Stainless Steel and Similar Alloys
1.3 GradesTP321 andTP321H have lower strength require-
2.2 Other Standards:
3
ments for nominal wall thicknesses greater than ⁄8 in. [9.5
SNT-TC-1A Personnel Qualification and Certification in
4
mm].
Nondestructive Testing
1.4 The values stated in either inch-pound units or SI units
3. Ordering Information
are to be regarded separately as standard. Within the text, the
SI units are shown in brackets. The values stated in each 3.1 Orders for material to this specification should include
system may not be exact equivalents; therefore, each system
the following, as required to describe the desired material
shall be used independently of the other. Combining values adequately:
from the two systems may result in non-conformance with the
3.1.1 Quantity (feet, centimetres, or number of lengths),
standard. The inch-pound units shall apply unless the “M” 3.1.2 Name of material (seamless austenitic steel pipe),
designation of this specification is specified in the order. 3.1.3 Grade (Table 1),
3.1.4 Size (nominal size, or outside diameter and schedule
NOTE 2—The dimensionless designators NPS (nominal pipe size) and
number or average wall thickness),
DN (Diametre Nominel) have been substituted in this standard for such
3.1.5 Lengths (specific or random), (Permissible Variations
traditional terms as “nominal diameter,” “size,” and “nominal size.”
in Length Section of Specification A999/A999M),
1.5 This international standard was developed in accor-
3.1.6 End finish (Ends Section of Specification A999/
dance with internationally recognized principles on standard-
A999M),
ization established in the Decision on Principles for the
3.1.7 Optional requirements (Section 8) (see Hydrostatic
Development of International Standards, Guides and Recom-
Test Requirements Section and the Permissible Variation in
mendations issued by the World Trade Organization Technical
Weight for Seamless Pipe Section for weighing individual
Barriers to Trade (TBT) Committee.
lengths, of Specification A999/A999M), (see 9.6, repairing by
welding; 13.3, die stamping),
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
3
A01.10 on Stainless and Alloy Steel Tubular Products. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Nov. 1, 2022. Published November 2022. Originally contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
approved in 1954. Last previous edition approved in 2019 as A376/A376M – 19. Standards volume information, refer to the standard’s Document Summary page on
DOI: 10.1520/A0376_A0376M-22. the ASTM website.
2 4
For ASME Boiler and Pressure Vessel Code applications see related Specifi- AvailablefromAmericanSocietyforNondestructiveTes
...

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: A376/A376M − 19 A376/A376M − 22 Used in USDOE-NE standards
Standard Specification for
Seamless Austenitic Steel Pipe for High-Temperature
1
Service
This standard is issued under the fixed designation A376/A376M; 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 austenitic steel pipe intended for high-temperature service. Among the grades covered are
H grades and nitrogen grades that are specifically intended for high-temperature service.
NOTE 1—This specification was originally developed for use for piping in the central stations of electric-power generating thermal plants. However, its
use is not restricted to such applications and it may be used in other applications for which the attributes of the materials, as defined by this specification,
are appropriate.
1.2 Optional supplementary requirements (S1 through S10) are provided. These supplementary requirements specify additional
tests that will be made only when stated in the order, together with the number of such tests required.
3
1.3 Grades TP321 and TP321H have lower strength requirements for nominal wall thicknesses greater than ⁄8 in. [9.5 mm].
1.4 The values stated in either inch-pound units or SI 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 2—The dimensionless designators NPS (nominal pipe size) and DN (Diametre Nominel) have 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
3
2.1 ASTM Standards:
A262 Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels
A999/A999M Specification for General Requirements for Alloy and Stainless Steel Pipe
E112 Test Methods for Determining Average Grain Size
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 Nov. 1, 2019Nov. 1, 2022. Published November 2019November 2022. Originally approved in 1954. Last previous edition approved in 20172019
as A376/A376M – 17.A376/A376M – 19. DOI: 10.1520/A0376_A0376M-19.10.1520/A0376_A0376M-22.
2
For ASME Boiler and Pressure Vessel Code applications see related Specification SA-376 in Section II of that Code.
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*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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A376/A376M − 22
E213 Practice for Ultrasonic Testing of Metal Pipe and Tubing
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
2.2 Other Standards:
4
SNT-TC-1A Personnel Qualification and Certification in Nondestructive Testing
3. Ordering Information
3.1 Orders for material to this specification should include the following, as required to describe the desired material adequately:
3.1.1 Quantity (feet, centimetres, or number of lengths),
3.1.2 Name of material (seamless austenitic steel pipe),
TABLE 1 Chemical Requirements
A
UNS Composition, %
Desig-
Carbon Man- Phos- Sul- Sili-
...