ASTM A790/A790M-04a

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

SCOPE
1.1 This specification 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 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 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 are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the specification. The inch-pound units shall apply unless the  M designation of this specification is specified in the order. The dimensionless designator NPS (nominal pipe size) has been substituted in this standard for such traditional terms as nominal diameter, size, and nominal size.
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.

General Information

• Status: Historical
• Publication Date: 31-May-2004
• 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

Relations

• Replaces: ASTM A790/A790M-04 - Standard Specification for Seamless and Welded Ferritic/Austenitic Stainless Steel Pipe
• Effective Date: 01-Jun-2004
• Replaced By: ASTM A790/A790M-05 - Standard Specification for Seamless and Welded Ferritic/Austenitic Stainless Steel Pipe
• Effective Date: 01-Mar-2005
• Referred By: ASTM A999/A999M-23 - Standard Specification for General Requirements for Alloy and Stainless Steel Pipe
• Effective Date: 01-Jun-2004
• Referred By: ASTM A554-21 - Standard Specification for Welded Stainless Steel Mechanical Tubing
• Effective Date: 01-Jun-2004

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: A 790/A 790M – 04a
Standard Specification for
Seamless and Welded Ferritic/Austenitic Stainless Steel
1
Pipe
This standard is issued under the fixed designationA 790/A 790M; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope* A 941 Terminology Relating to Steel, Stainless Steel, Re-
2
lated Alloys and Feroalloys
1.1 This specification covers seamless and straight-seam
A 999/A 999M Specification for General Requirements for
welded ferritic/austenitic steel pipe intended for general corro-
Alloy and Stainless Steel Pipe
sive service, with particular emphasis on resistance to stress
E 213 Practice for Ultrasonic Examination of Metal Pipe
corrosion cracking. These steels are susceptible to embrittle-
and Tubing
ment if used for prolonged periods at elevated temperatures.
E 309 Practice for Eddy-Current Examination of Steel Tu-
1.2 Optional supplementary requirements are provided for
bular Products Using Magnetic Saturation
pipe when a greater degree of testing is desired. These
E 381 Method of Macroetch Testing Steel Bars, Billets,
supplementaryrequirementscallforadditionalteststobemade
Blooms, and Forgings
and,whendesired,oneormoreofthesemaybespecifiedinthe
E 426 Practice for Electromagnetic (Eddy-Current) Exami-
order.
nation of Seamless and Welded Tubular Products, Austen-
1.3 Appendix X1 of this specification lists the dimensions
itic Stainless Steel and Similar Alloys
of welded and seamless stainless steel pipe as shown in ANSI
E 527 Practice for Numbering Metals and Alloys (UNS)
B36.19. Pipe having other dimensions may be furnished
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2.2 ANSI Standards:
provided such pipe complies with all other requirements of this
B1.20.1 Pipe Threads, General Purpose
specification.
B36.10 Welded and Seamless Wrought Steel Pipe
1.4 The values stated in either inch-pound units or SI units
B36.19 Stainless Steel Pipe
are to be regarded separately as standard. Within the text, the
5
2.3 SAE Standard:
SI units are shown in brackets. The values stated in each
SAE J 1086
system are not exact equivalents; therefore, each system must
6
2.4 Other Standard:
be used independently of the other. Combining values from the
SNT-TC-1A Personal Qualification and Certification in
two systems may result in nonconformance with the specifi-
Nondestructive Testing
cation. The inch-pound units shall apply unless the M desig-
2.5 AWS Standard
nation of this specification is specified in the order.
A5.9 Corrosion-Resisting Chromium and Chromium-
NOTE 1—The dimensionless designator NPS (nominal pipe size) has
Nickel Steel Welding Rods and Electrodes
been substituted in this standard for such traditional terms as nominal
diameter, size, and nominal size.
3. Terminology
3.1 Definitions—For definitions of terms used in this speci-
2. Referenced Documents
fication refer to Terminology A 941.
3
2.1 ASTM Standards:
A 370 Test Methods and Definitions for MechanicalTesting
4. Ordering Information
of Steel Products
4.1 Orders for material under this specification should
include the following, as required, to describe the desired
material adequately:
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
4.1.1 Quantity (feet, metres, or number of lengths),
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
4.1.2 Name of material (ferritic/austenitic steel pipe),
A01.10 on Stainless and Alloy Steel Tubular Products.
CurrenteditionapprovedJune1,2004.PublishedJuly2004.Originallyapproved
in 1981. Last previous edition approved in 2004 as A 790/A 790M – 04.
2 4
For ASME Boiler and Pressure Vessel Code applications see related Specifi- Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
cation SA–790 in Section II of that Code. 4th Floor, New York, NY 10036.
3 5
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Available from Society of Automotive Engineers (SAE), 400 Commonwealth
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Dr., Warrendale, PA 15096-0001.
6
Standards volume information, refer to the standard’s Document Summary page on Available fromTheAmerican Society for NondestructiveTesting (ASNT), P.O.
the ASTM website. Box 28518, 1711 Arlingate Ln., Columbus, OH 43228-0518.
*ASummary 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.
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A 790/A 790M – 04a
4.1.3 Process (seamless or welded), 6.2 Discard—A sufficient discard shall be made fro
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