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ASTM A270-03a

Current Revision

Standard Specification for Seamless and Welded Austenitic Stainless Steel Sanitary Tubing

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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.


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.


SDO ASTM: ASTM International
Document Number A270
Publication Date Dec. 1, 2004
Language en - English
Page Count 6
Revision Level 03a
Supercedes
Committee A01.10
Publish Date Document Id Type View
Dec. 1, 2004 A0270-03A Revision
April 10, 2003 A0270-03 Revision
Nov. 10, 2002 A0270-02A Revision
April 10, 2002 A0270-98AE03 Revision
April 10, 2002 A0270-02 Revision
April 10, 2002 A0270-01 Revision
Oct. 1, 2008 A0270-03AR08E01 Reaffirmation