ASTM-A928 › Standard Specification for Ferritic/Austenitic (Duplex) Stainless Steel Pipe Electric Fusion Welded with Addition of Filler Metal
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Scope
1.1 This specification covers electric-fusion-welded steel pipe suitable for corrosive service.
Note 1-The dimensionless designator NPS (nominal pipe size) has been substituted in this specification for traditional terms such as "nominal diameter," "size," and "nominal size."1.2 This specification covers nine grades of ferritic/austenitic steel as indicated in Table 1. 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 using filler metal in all passes and shall be radiographed completely.
1.3.2 Class 2 -Pipe shall be double welded by processes using filler metal in all passes. No radiograph is required.
1.3.3 Class 3 -Pipe shall be single welded by processes using filler metal in all passes and shall be radiographed completely.
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 6.2.2.1 and 6.2.2.2).
1.3.5 Class 5 -Pipe shall be double welded by processes using 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 S4 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 the specification is specified in the order.
Keywords
Stainless steel-pipe; pipe-ferritic/austenitic (duplex) stainless steel,; electric-fusion-welded with addition of filler metal, for corrosive; service, spec; ICS Number Code 25.160.40 (Welding joints and welds)
To find similar documents by ASTM Volume:
01.01 (Steel--Piping, Tubing, Fittings)
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Document Number
ASTM-A0928_A0928M-14R21
Revision Level
2014 R21 EDITION
Status
Current
Modification Type
Revision
Publication Date
April 22, 2021
Document Type
Specification
Page Count
6 pages
Committee Number
A01.10