ASTM A270-01
(Specification)Standard Specification for Seamless and Welded Austenitic Stainless Steel Sanitary Tubing
Standard Specification for Seamless and Welded Austenitic Stainless Steel Sanitary Tubing
SCOPE
1.1 This specification covers grades of seamless and welded 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. (304.8 mm) in outside diameter.
1.3 The values stated in inch-pound units are to be regarded as 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.
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NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
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Designation: A 270 – 01 An American National Standard
Standard Specification for
Seamless and Welded Austenitic Stainless Steel Sanitary
1
Tubing
This standard is issued under the fixed designation A 270; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope 3. Terminology
1.1 This specification covers grades of seamless and welded 3.1 Definition:
austenitic stainless steel sanitary tubing intended for use in the 3.1.1 roughness average, Ra, n—arithmetic average surface
dairy and food industry and having special surface finishes. roughness normally reported in microinches or microns; a
Pharmaceutical quality may be requested, as a supplementary measurement of surface roughness usually performed by mov-
requirement. ing a stylus in a straight line along the surface, although other
1.2 This specification covers tubes in sizes up to and methods may be used.
including 12 in. (304.8 mm) in outside diameter.
4. Ordering Information
1.3 The values stated in inch-pound units are to be regarded
as the standard. 4.1 Orders for material under this specification should
include the following, as required, to describe the desired
1.4 Optional supplementary requirements are provided, and
when one or more of these are desired, each shall be so stated material adequately:
4.1.1 Quantity (feet, metres, or number of lengths),
in the order.
4.1.2 Name of material (seamless or welded tubes),
2. Referenced Documents
4.1.3 Size (outside diameter and average wall thickness),
2.1 ASTM Standards: 4.1.4 Length (specific or random),
A 262 Practices for Detecting Susceptibility to Intergranu- 4.1.5 Surface finish (Section 14),
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lar Attack in Austenitic Stainless Steels 4.1.6 Optional requirements (product analysis, see Section
A 450/A 450M Specification for General Requirements for 9; hydrostatic or nondestructive electric test, see Section11).
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Carbon, Ferritic Alloy, and Austenitic Alloy Steel Tubes 4.1.7 Test report required (Certification Section of Specifi-
A 480/A 480M Specification for General Requirements for cation A 450/A 450M),
Flat Rolled Stainless and Heat-Resisting Steel Plate, Sheet, 4.1.8 Specification designation,
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and Strip 4.1.9 Special requirements, and
A 967 Specification for Chemical Passivation Treatments 4.2 Any supplementary requirements.
2
for Stainless Steel Parts
3 5. General Requirements
E 527 Practice for Numbering Metals and Alloys (UNS)
5.1 Material furnished under this specification shall con-
2.2 ASME Standard:
B46.1 Surface Texture (Surface Roughness, Waviness, and form to the applicable requirements of the current edition
4
of Specification A 450/A 450M, unless otherwise provided
Lay)
2.3 Other Standard: herein.
SAE J1086 Practice for Numbering Metals and Alloys
6. Manufacture
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(UNS)
6.1 The tubes shall be made by the seamless or welded
process.
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This specification is under the jurisdiction of ASTM Committee A01 on Steel, 6.2 At the manufacturer’s option, tubing may be furnished
Stainless Steel, and Related Alloys, and is the direct responsibility of Subcommittee
either hot finished or cold finished.
A01.10 on Stainless and Alloy Steel Tubular Products.
Current edition approved Mar. 10, 2001. Published May 2001. Originally
7. Heat Treatment
published as A 270 – 44 T. Last previous edition A 270 – 98a.
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Annual Book of ASTM Standards, Vol 01.03. 7.1 All material shall be furnished in the heat-treated
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Annual Book of ASTM Standards, Vol 01.01.
condition. The heat treatment procedure, except for N08926
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Available from ASME International, Three Park Avenue, New York, NY
and N08367, shall consist of heating the material to a minimum
10016–5990.
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temperature of 1900°F (1040°C) and quenching in water or
Available from Society of Automotive Engineers, 400 Commmonwealth Drive,
Warrendale, PA 15096.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
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A 270
rapid cooling by other means. 12.1.1 Variations in outside diameter and length from those
7.2 N08926 shall be heat-treated to a minimum temperature specified shall not exceed the amount prescribed in Table 2 for
of 2010°F [1100°C] followed by quenching in water or rapidly tubes with specified wall thicknesses of 0.049 in. (1.24 mm)
cooling by other means. UNS N08367 should be solution and over. For tubes specified with wall thicknesses under 0.049
annealed from 2025°F (1107°C) minimum followed by rapid in. (1.24 mm), the diameter tolerances shall be a matter for
quenching. agreem
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