Seamless Welded steel pipe

ASTM A270 Seamless and Welded Austenitic and Ferritic and Austenitic Stainless Steel Sanitary Tubing Scope 1.1 This speci&#*;cation 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 &#*;nishes. Pharmaceutical quality may be requested, as a supplementary requirement. 1.2 This speci&#*;cation 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 standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered 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 2. Referenced Documents 2.1 ASTM Standards:2 A 262 Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels A 480/A 480M Specification for General Requirements for Flat-Rolled Stainless and Heat-Resisting Steel Plate, Sheet, and Strip A 923 Test Methods for Detecting Detrimental Intermetallic Phase in Duplex Austenitic/Ferritic Stainless Steels A 967 Specification for Chemical Passivation Treatments for Stainless Steel Parts A 1016/A 1016M Specification for General Requirements for Ferritic Alloy Steel, Austenitic Alloy Steel, and Stainless Steel Tubes E 527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS) 2.2 ASME Standard: B46.1 Surface Texture (Surface Roughness, Waviness, and Lay)3 2.3 ASME Boiler and Pressure Vessel Code: Section VIII Pressure Vessels3 2.4 Other Standard: SAE J1086 Practice for Numbering Metals and Alloys(UNS)4 3. Terminology 3.1 Definition: 3.1.1 roughness average, Ra, n-arithmetic average surface roughness normally reported in microinches or microns; a measurement of surface roughne....

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