ASTM A270/A270M-24

Standard Specification for Seamless and Welded Austenitic and Ferritic/Austenitic Stainless Steel Sanitary Tubing

ABSTRACT
This specification covers grades of seamless, welded, and heavily cold worked austenitic and ferritic/austenitic stainless steel sanitary tubing. Seamless tubes shall be manufactured by a process that does not involve welding at any stage. Welded tubes shall be made using an automated welding process with no addition of filler metal during the welding process. Heavily cold worked tubes shall be made by applying cold working of not less than 35% reduction of thickness of both wall and weld to a welded tube prior to the final anneal. No filler shall be used in making the weld. All material shall be furnished in the heat-treated condition. A chemical analysis of either one length of flat-rolled stock or one tube shall be made for each heat. Each tube shall be subjected to mechanical tests like reverse flattening test, hydrostatic test or nondestructive electric test. The following surface finishes may be specified: mill finish, mechanically polished surface finish, finish No. 80, finish No. 120, finish No. 180, finish No. 240, electropolished finish, and maximum roughness average surface finish. Longitudinally polished finish shall be performed on the inside surface only while a circumferential polished finish shall be done on either the inside surface, outside surface, or both.
SCOPE
1.1 This specification covers grades of seamless, welded, and heavily cold worked welded austenitic and ferritic/austenitic stainless steel sanitary tubing intended for use in the dairy and food industry and having special surface finishes. Pharmaceutical quality may be requested, as a supplementary requirement.  
1.2 This specification covers tubes in sizes up to and including 12 in. [300 mm] in outside diameter.  
1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. 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.  
1.4 Optional supplementary requirements are provided, and when one or more of these are desired, each shall be so stated in the order.  
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: 29-Feb-2024
• 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 A270/A270M-23 - Standard Specification for Seamless and Welded Austenitic and Ferritic/Austenitic Stainless Steel Sanitary Tubing
• Effective Date: 01-Mar-2024
• Referred By: ASTM A1016/A1016M-23 - Standard Specification for General Requirements for Ferritic Alloy Steel, Austenitic Alloy Steel, and Stainless Steel Tubes
• Effective Date: 01-Mar-2024

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: A270/A270M − 24
Standard Specification for
Seamless and Welded Austenitic and Ferritic/Austenitic
1
Stainless Steel Sanitary Tubing
This standard is issued under the fixed designation A270/A270M; 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* Flat-Rolled Stainless and Heat-Resisting Steel Plate,
Sheet, and Strip
1.1 This specification covers grades of seamless, welded,
A923 Test Methods for Detecting Detrimental Intermetallic
and heavily cold worked welded austenitic and ferritic/
Phase in Duplex Austenitic/Ferritic Stainless Steels
austenitic stainless steel sanitary tubing intended for use in the
A967/A967M Specification for Chemical Passivation Treat-
dairy and food industry and having special surface finishes.
ments for Stainless Steel Parts
Pharmaceutical quality may be requested, as a supplementary
A1016/A1016M Specification for General Requirements for
requirement.
Ferritic Alloy Steel, Austenitic Alloy Steel, and Stainless
1.2 This specification covers tubes in sizes up to and
Steel Tubes
including 12 in. [300 mm] in outside diameter.
E527 Practice for Numbering Metals and Alloys in the
1.3 The values stated in either SI units or inch-pound units Unified Numbering System (UNS)
are to be regarded separately as standard. The values stated in
2.2 ASME Standard:
each system may not be exact equivalents; therefore, each
B46.1 Surface Texture (Surface Roughness, Waviness, and
3
system shall be used independently of the other. Combining
Lay)
values from the two systems may result in non-conformance
2.3 ASME Boiler and Pressure Vessel Code:
3
with the standard.
Section VIII Pressure Vessels
1.4 Optional supplementary requirements are provided, and 2.4 Other Standard:
when one or more of these are desired, each shall be so stated SAE J1086 Practice for Numbering Metals and Alloys
4
in the order. (UNS)
1.5 This international standard was developed in accor-
3. Terminology
dance with internationally recognized principles on standard-
3.1 Definitions:
ization established in the Decision on Principles for the
3.1.1 roughness average, Ra, n—arithmetic average surface
Development of International Standards, Guides and Recom-
roughness normally reported in microinches or microns; a
mendations issued by the World Trade Organization Technical
measurement of surface roughness usually performed by mov-
Barriers to Trade (TBT) Committee.
ing a stylus in a straight line along the surface, although other
2. Referenced Documents
methods may be used.
2
2.1 ASTM Standards:
4. Ordering Information
A262 Practices for Detecting Susceptibility to Intergranular
4.1 It is the responsibility of the purchaser to specify all
Attack in Austenitic Stainless Steels
requirements that are necessary for material ordered under this
A480/A480M Specification for General Requirements for
specification. Such requirements may include, but are not
limited to, the following:
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 Grade or UNS Designation,
A01.10 on Stainless and Alloy Steel Tubular Products.
Current edition approved March 1, 2024. Published March 2024. Originally
approved in 1944. Last previous edition approved in 2023 as A270/A270M – 23.
3
DOI: 10.1520/A0270_A0270M-24. Available from American Society of Mechanical Engineers (ASME), ASME
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or International Headquarters, Two Park Ave., New York, NY 10016-5990, http://
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM www.asme.org.
4
Standards volume information, refer to the standard’s Document Summary page on Available from Society of Automotive Engineers (SAE), 400 Commonwealth
the ASTM website. Dr., Warrendale, PA 15096-0001, http://www.sae.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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A270/A270M − 24
4.1.3 Process seamless (SML), welded (WLD), or heavily 7.5 S32003 shall be heat-treated in a temperature range of
cold worked (HCW), 1850 °F [1010 °C] to 2010 °F [1100
...

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: A270/A270M − 23 A270/A270M − 24
Standard Specification for
Seamless and Welded Austenitic and Ferritic/Austenitic
1
Stainless Steel Sanitary Tubing
This standard is issued under the fixed designation A270/A270M; 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*
1.1 This specification covers grades of seamless, welded, and heavily cold worked welded austenitic and ferritic/austenitic
stainless steel sanitary tubing intended for use in the dairy and food industry and having special surface finishes. Pharmaceutical
quality may be requested, as a supplementary requirement.
1.2 This specification covers tubes in sizes up to and including 12 in. [300 mm] in outside diameter.
1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. 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.
1.4 Optional supplementary requirements are provided, and when one or more of these are desired, each shall be so stated in the
order.
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
2
2.1 ASTM Standards:
A262 Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels
A480/A480M Specification for General Requirements for Flat-Rolled Stainless and Heat-Resisting Steel Plate, Sheet, and Strip
A923 Test Methods for Detecting Detrimental Intermetallic Phase in Duplex Austenitic/Ferritic Stainless Steels
A967/A967M Specification for Chemical Passivation Treatments for Stainless Steel Parts
A1016/A1016M Specification for General Requirements for Ferritic Alloy Steel, Austenitic Alloy Steel, and Stainless Steel
Tubes
E527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)
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, 2023March 1, 2024. Published May 2023March 2024. Originally approved in 1944. Last previous edition approved in 20192023 as
A270/A270M – 15 (2019).A270/A270M – 23. DOI: 10.1520/A0270_A0270M-23.10.1520/A0270_A0270M-24.
2
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

---------------------- Page: 1 ----------------------
A270/A270M − 24
2.2 ASME Standard:
3
B46.1 Surface Texture (Surface Roughness, Waviness, and Lay)
2.3 ASME Boiler and Pressure Vessel Code:
3
Section VIII Pressure Vessels
2.4 Other Standard:
4
SAE J1086 Practice for Numbering Metals and Alloys (UNS)
3. Terminology
3.1 Definitions:
3.1.1 roughness average, Ra, n—arithmetic average surface roughness normally reported in microinches or microns; a
measurement of surface roughness usually performed by moving a stylus in a straight line along the surface, although other
methods may be used.
4. Ordering Information
4.1 It is the responsibility of the purchaser to specify all requirements that are necessary for material ordered under this
specification. Such requirements may include, but are not limited to, the following:
4.1.1 Quantity (feet, metres, or number of lengths),
4.1.2 Grade or UNS Designation,
4.1.3 Process seamless (SML), welded (WLD), or heavily cold worked (HCW),
4.1.4 Size (outside diameter and average wall thickness),
4.1.5 Length (specific or random),
4.1.6 Surface finish (Section 13),
4.1.7 Optional requirements (product analysis, see Secti
...