|Description / Abstract
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|This standard covers the gas and arc welding of butt, fillet,
and socket welds in carbon and low-alloy steel piping used in the
compression, pumping, and transmission of crude petroleum,
petroleum products, fuel gases, carbon dioxide, nitrogen and, where
applicable, covers welding on distribution systems. It applies to
both new construction and in-service welding. The welding may be
done by a shielded metal-arc welding, submerged arc welding, gas
tungsten-arc welding, gas metal-arc welding, flux-cored arc
welding, plasma arc welding, oxyacetylene welding, or flash butt
welding process or by a combination of these processes using a
manual, semiautomatic, mechanized, or automatic welding technique
or a combination of these techniques. The welds may be produced by
position or roll welding or by a combination of position and roll
This standard also covers the procedures for radiographic,
magnetic particle, liquid penetrant, and ultrasonic testing, as
well as the acceptance standards to be applied to production welds
tested to destruction or inspected by radiographic, magnetic
particle, liquid penetrant, ultrasonic, and visual testing
The values stated in either inch-pound units or SI units are to
be regarded separately as standard. Each system is to be used
independently of the other, without combining values in any
Processes other than those described above will be considered
for inclusion in this standard. Persons who wish to have other
processes included shall submit, as a minimum, the following
information for the committee's consideration:
a. A description of the welding process.
b. A proposal on the essential variables.
c. A welding procedure specification.
d. Weld inspection methods.
e. Types of weld imperfections and their proposed acceptance
f. Repair procedures.
It is intended that all work performed in accordance with this
standard shall meet or exceed the requirements of this
|Additional Supplemental Documents