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1.1 This specification covers electric-fusion-welded austenitic chromium-nickel alloy steel pipe suitable for corrosive or high-temperature service, or both.
Note 1--The dimensionless designator NPS (nominal pipe size) has been substituted in this standard for such traditional terms as "nominal diameter," "size," and "nominal size."
1.2 This specification covers nineteen grades of alloy steel as indicated in . The selection of the proper alloy and requirements for heat treatment shall be at the discretion of the purchaser, dependent on the service conditions to be encountered.
1.3 Five classes of pipe are covered as follows:
1.3.1 Class 1--Pipe shall be double welded by processes employing filler metal in all passes and shall be completely radiographed.
1.3.2 Class 2--Pipe shall be double welded by processes employing filler metal in all passes. No radiography is required.
1.3.3 Class 3--Pipe shall be single welded by processes employing filler metal in all passes and shall be completely radiographed.
1.3.4 Class 4--Same as Class 3 except that the weld pass exposed to the inside pipe surface may be made without the addition of filler metal (see 184.108.40.206and 220.127.116.11 ).
1.3.5 Class 5--Pipe shall be double welded by processes employing filler metal in all passes and shall be spot radiographed.
1.4 Supplementary requirements covering provisions ranging from additional testing to formalized procedures for manufacturing practice are provided. Supplementary Requirements S1 through S6 are included as options to be specified when desired.
1.5 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the specification. The inch-pound units shall apply unless the "M" designation of this specification is specified in the order.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
A240/A240M Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications
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
A941 Terminology Relating to Steel, Stainless Steel, Related Alloys, and Ferroalloys
A999/A999M Specification for General Requirements for Alloy and Stainless Steel Pipe
E527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)
ASME Boiler and Pressure Vessel CodeSection II Section III Section IX Section VIII
AWS SpecificationsA5.11/A5.11M Nickel and Nickel-Alloy Welding Electrodes for Shielded Metal Arc Welding A5.14/A5.14M Nickel and Nickel-Alloy Bare Welding Electrodes and Rods A5.22/A5.22M Stainless Steel Flux Cored and Metal Cored Welding Electrodes and Rods A5.30/A5.30M Consumable Inserts A5.4/A5.4M Stainless Steel Electrodes for Shielded Metal Arc Welding A5.9/A5.9M Bare Stainless Steel Welding Electrodes and Rods
Other StandardSAE J1086 Practice for Numbering Metals and Alloys (UNS)
ICS Number Code 23.040.10 (Iron and steel pipes)
UNSPSC Code 31311509(Stainless steel welded or brazed pipe assemblies)
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ASTM A358 / A358M-00, Standard Specification for Electric-Fusion-Welded Austenitic Chromium-Nickel Alloy Steel Pipe for High-Temperature Service, ASTM International, West Conshohocken, PA, 2001, www.astm.orgBack to Top