ASTM International

Standard Specification for Electric-Fusion-Welded Steel Pipe for Atmospheric and Lower Temperatures
 N A671/A671M

Annotation

This specification2 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.

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.

Several grades and classes of pipe are provided.

Grade designates the type of plate used as listed in 5.1.

NOTE 1 - Selection of materials should be made with attention to temperature of service. For such guidance, Specification A20/A20M may be consulted.

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 For ASME Boiler and Pressure Vessel Code applications see related Specification SA-671 in Section II of that Code.