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ASTM A 691 Document Information:
Title
Standard Specification for Carbon and Alloy Steel Pipe, Electric-Fusion-Welded for High-Pressure Service at High Temperatures
ASTM International
Publication Date:
Jun 10, 1998
Scope:
This specification2 covers carbon and alloy steel
pipe, electric-fusion-welded with filler metal added, fabricated
from pressure-vessel-quality plate of several analyses and strength
levels and suitable for high-pressure service at high temperatures.
Heat treatment may or may not be required to attain the desired
mechanical 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. (405 mm) in
outside diameter and larger with wall thicknesses up to 3 in. (75
mm) inclusive. 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 Table
1.
Class designates the type of heat treatment performed in the
manufacture of the pipe, whether the weld is radiographically
examined, and whether the pipe has been pressure tested as listed
in 1.3.3.
NOTE 1—Selection of materials should be made with attention to
temperature of service. For such guidance, Specification A 20/A 20M
may be consulted.
Optional requirements of a supplementary nature are provided,
calling for additional tests and control of repair welding, when
desired.
The values stated in inch-pound units are to be regarded as the
standard.
2 For ASME Boiler and Pressure Vessel Code
applications, see related Specification SA-691 in Section II of
that Code.
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