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1.1 This specification covers electric-fusion-welded steel pipe with filler metal added, fabricated from pressure vessel quality plate of several analyses and strength levels and suitable for high-pressure service at atmospheric and lower temperatures. Heat treatment may or may not be required to attain the desired properties or to comply with applicable code requirements. Supplementary requirements are provided for use when additional testing or examination is desired.
1.2 The specification nominally covers pipe 16 in. [400 mm] in outside diameter or larger and of 1/4 in. [6 mm] wall thickness or greater. Pipe having other dimensions may be furnished provided it complies with all other requirements of this specification.
1.3 Several grades and classes of pipe are provided.
1.3.1 Grade designates the type of plate used as listed in 5.1.
1.3.2 Class designates the type of heat treatment performed during manufacture of the pipe, whether the weld is radiographically examined, and whether the pipe has been pressure tested as listed in 1.3.3.
1.3.3 Class designations are as follows (Note 1):
|Class||Heat Treatment on Pipe||Radiography, see Section||Pressure Test, see:|
|20||stress relieved, see 5.3.1||none||none|
|21||stress relieved, see 5.3.1||9||none|
|22||stress relieved, see 5.3.1||9||8.3|
|23||stress relieved, see 5.3.1||none||8.3|
|30||normalized, see 5.3.2||none||none|
|31||normalized, see 5.3.2||9||none|
|32||normalized, see 5.3.2||9||8.3|
|33||normalized, see 5.3.2||none||8.3|
|40||normalized and tempered, see 5.3.3||none||none|
|41||normalized and tempered, see 5.3.3||9||none|
|42||normalized and tempered, see 5.3.3||9||8.3|
|43||normalized and tempered, see 5.3.3||none||8.3|
|50||quenched and tempered, see 5.3.4||none||none|
|51||quenched and tempered, see 5.3.4||9||none|
|52||quenched and tempered, see 5.3.4||9||8.3|
|53||quenched and tempered, see 5.3.4||none||8.3|
|60||normalized and precipitation heat treated||none||none|
|61||normalized and precipitation heat treated||9||none|
|62||normalized and precipitation heat treated||9||8.3|
|63||normalized and precipitation heat treated||none||8.3|
|70||quenched and precipitation heat treated||none||none|
|71||quenched and precipitation heat treated||9||none|
|72||quenched and precipitation heat treated||9||8.3|
|73||quenched and precipitation heat treated||none||8.3|
Note 1—Selection of materials should be made with attention to temperature of service. For such guidance, Specification A20/A20M may be consulted.
1.4 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 may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. 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.
A20/A20M Specification for General Requirements for Steel Plates for Pressure Vessels
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
A435/A435M Specification for Straight-Beam Ultrasonic Examination of Steel Plates
A530/A530M Specification for General Requirements for Specialized Carbon and Alloy Steel Pipe
A577/A577M Specification for Ultrasonic Angle-Beam Examination of Steel Plates
A578/A578M Specification for Straight-Beam Ultrasonic Examination of Rolled Steel Plates for Special Applications
E110 Test Method for Indentation Hardness of Metallic Materials by Portable Hardness Testers
E165 Practice for Liquid Penetrant Examination for General Industry
E709 Guide for Magnetic Particle Testing
ASME Boiler and Pressure Vessel CodeSectionIX,WeldingQua
ICS Number Code 23.040.10 (Iron and steel pipes)