This specification covers carbon and alloy steel forgings for pipe flanges, fittings, valves, and parts for high-pressure transmission service. A chemical heat analysis of the steel shall be made, and the steel shall conform to specified chemical composition requirements. Materials adhere to testing and tensile property requirements as well.
This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
1.1 This specification covers forged or rolled steel pipe flanges, forged fittings, valves, and parts suitable for use with high-strength transmission-service pipe. Included are flanges, fittings, and similar parts ordered either to dimensions specified by the purchaser or to ASME or MSS dimensional standards referenced in Section 2.
1.2 Several grades of material, based on minimum yield strength requirements, are covered, as indicated in Table 1.
1.3 Supplementary Requirements are provided. Supplementary Requirement S 1 is provided for use when purchaser approval is required for repair welding.
1.4 This specification is expressed in both inch-pound units and in SI units. However, unless the order specifies the applicable “M” specification designation (SI units), the material shall be furnished to inch-pound units.
1.5 The values stated in either SI units or inch-pound 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 standard.
TABLE 1 Tensile Requirements
|Yield Strength (0.2 % Offset), min, ksi [MPa]|
min, ksi [MPa]
|Elongation in 2 in. or 50 mm, min %|
|F42||42 ||60 ||20|
|F46||46 ||60 ||20|
|F48||48 ||62 ||20|
|F50||50 ||64 ||20|
|F52||52 ||66 ||20|
|F56||56 ||68 ||20|
|F60||60 ||75 ||20|
|F65||65 ||77 ||20|
|F70 ||70 ||82 ||18 |
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
A53/A53M Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless
A106/A106M Specification for Seamless Carbon Steel Pipe for High-Temperature Service
A381 Specification for Metal-Arc-Welded Steel Pipe for Use With High-Pressure Transmission Systems
A707/A707M Specification for Forged Carbon and Alloy Steel Flanges for Low-Temperature Service
A788/A788M Specification for Steel Forgings, General Requirements
A961/A961M Specification for Common Requirements for Steel Flanges, Forged Fittings, Valves, and Parts for Piping Applications
high strength low alloy steel; pipe fittings, steel; piping applications; pressure containing parts; steel flanges; steel forgings, alloy; steel forgings, carbon; steel valves; Alloy steel forgings--specifications; Carbon steel forgings--specifications; High pressure service applications--specifications; High-temperature service applications--steel forgings; Steel fittings--specifications; Steel flanges--specifications; Steel valves--specifications ;
ICS Number Code 77.140.85 (Iron and steel forgings)
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