ASTM A733-16(2022)

Standard Specification for Welded and Seamless Carbon Steel and Austenitic Stainless Steel Pipe Nipples

ABSTRACT
This specification covers welded and seamless carbon steel and austenitic stainless steel pipe nipples. The mechanical requirements stated that, pipe nipples shall be made from new, hydrostatic tested or NDE-tested pipe, pipe and nipples shall be threaded on both ends with NPT taper pipe threads. The standard and special lengths and sizes of nipples are presented. Galvanized nipples ordered under this specification shall be made from pipe coated on the inside and outside by the hot dip process. Samples of nipples sufficient to determine their conformance with the requirements of this specification shall be taken at random for each lot of nipples of the same pipe size, length, and material, also, samples shall be inspected to determine their conformance with the dimensional requirements, including thread dimensions.
SCOPE
1.1 This specification covers the requirements for welded and seamless carbon steel pipe nipples, black and zinc-coated (hot-dip galvanized), and welded and seamless austenitic stainless steel pipe nipples in standard steel pipe sizes from 1/8 to 12 in. inclusive, in standard or special lengths.  
1.1.1 Welded Carbon Steel—Pipe nipples ordered under these requirements are intended for general uses, as described by Specification A53/A53M or for low-temperature service as described by Specification A333/A333M.  
1.1.2 Seamless Carbon Steel—Pipe nipples ordered under these requirements are intended for general and special uses, as described by the applicable Specifications A53/A53M and A106/A106M or for low temperature service as described by Specification A333/A333M (see 4.1.1).  
1.1.3 Austenitic Stainless Steel—Pipe nipples ordered under these requirements are intended for high-temperature and general corrosion service, as described by Specification A312/A312M (see 4.1.2).  
1.1.4 The text for this specification contains notes or footnotes, or both, that provide explanatory material. Such notes and footnotes, excluding those in tables, do not contain any mandatory language.  
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
1.3 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-Aug-2022
• ICS: 23.040.40 - Metal fittings
• Technical Committee: A01 - Steel, Stainless Steel and Related Alloys
• Drafting Committee: A01.22 - Steel Forgings and Wrought Fittings for Piping Applications and Bolting Materials for Piping and Special Purpose Applications

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: A733 − 16 (Reapproved 2022)
Standard Specification for
Welded and Seamless Carbon Steel and Austenitic Stainless
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Steel Pipe Nipples
This standard is issued under the fixed designation A733; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope 2. Referenced Documents
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1.1 This specification covers the requirements for welded 2.1 ASTM Standards:
and seamless carbon steel pipe nipples, black and zinc-coated A53/A53M Specification for Pipe, Steel, Black and Hot-
(hot-dip galvanized), and welded and seamless austenitic Dipped, Zinc-Coated, Welded and Seamless
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stainless steel pipe nipples in standard steel pipe sizes from ⁄8 A106/A106M Specification for Seamless Carbon Steel Pipe
to 12 in. inclusive, in standard or special lengths. for High-Temperature Service
1.1.1 Welded Carbon Steel—Pipe nipples ordered under A312/A312M Specification for Seamless, Welded, and
these requirements are intended for general uses, as described Heavily Cold Worked Austenitic Stainless Steel Pipes
by Specification A53/A53M or for low-temperature service as A333/A333M Specification for Seamless and Welded Steel
described by Specification A333/A333M. Pipe for Low-Temperature Service and Other Applications
1.1.2 Seamless Carbon Steel—Pipe nipples ordered under with Required Notch Toughness
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these requirements are intended for general and special uses, as
2.2 American National Standards Institute Standards:
described by the applicable Specifications A53/A53M and
B1.20.1 Pipe Threads, General Purpose
A106/A106M or for low temperature service as described by
B36.10 Standard for Welded and Seamless Wrought Steel
Specification A333/A333M (see 4.1.1).
Pipe
1.1.3 Austenitic Stainless Steel—Pipe nipples ordered under
B36.19 Standard for Stainless Steel Pipe
these requirements are intended for high-temperature and
general corrosion service, as described by Specification A312/
3. Ordering Information
A312M (see 4.1.2).
3.1 Information items to be considered, if appropriate, for
1.1.4 The text for this specification contains notes or
inclusion in purchase orders are as follows:
footnotes, or both, that provide explanatory material. Such
3.1.1 Quantity (pieces),
notes and footnotes, excluding those in tables, do not contain
3.1.2 Name of material (carbon steel or austenitic stainless
any mandatory language.
steel pipe nipples) (see 4.1.1 and 4.1.2),
1.2 The values stated in inch-pound units are to be regarded
3.1.2.1 Carbon steel applications should identify low-
as standard. The values given in parentheses are mathematical
temperature or high-temperature service, if applicable.
conversions to SI units that are provided for information only
3.1.3 Method of pipe manufacture (continuous-welded,
and are not considered standard.
electric-resistance welded, or seamless) (see 4.1.1),
3.1.4 Type and grade (if stainless steel),
1.3 This international standard was developed in accor-
3.1.5 Finish (carbon steel, black or galvanized),
dance with internationally recognized principles on standard-
3.1.6 Size (nominal and weight class or schedule number as
ization established in the Decision on Principles for the
shown in Table 1, or outside diameter and nominal wall),
Development of International Standards, Guides and Recom-
3.1.7 Length (standard or special, see 4.3),
mendations issued by the World Trade Organization Technical
3.1.8 Specification number,
Barriers to Trade (TBT) Committee.
3.1.9 Certification of compliance, if required, and
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This specification is under the jurisdiction of ASTM Committee A01 on Steel,
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Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee For referenced ASTM standards, visit the ASTM website, www.astm.org, or
A01.22 on Steel Forgings and Wrought Fittings for Piping Applications and Bolting contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Materials for Piping and Special Purpose Applications. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved Sept. 1, 2022. Published October 2022. Originally the ASTM website.
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approved in 1976. Last previous edition approved in 2016 as A733 – 16. DOI: Available from American National Standards Institute (ANSI), 25 W. 43rd St.,
10.1520/A0733-16R22. 4th Floor, New York, NY 10036, http://www.ansi.org.
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