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  • BSI
    BS 2971:1991 Specification for class II arc welding of carbon steel pipework for carrying fluids
    Edition: 1991
    $418.55
    / user per year

Description of BS 2971:1991 1991

This British Standard specifies requirements for both shop and site class II arc welding of joints in carbon steel pipework intended to carry fluids. It covers manual, automatic or semi-automatic arc welding or combinations of these processes, but it also allows joints to be made with an oxy-acetylene root run without a backing ring by agreement between the contracting parties.

NOTE 1 For details of oxy-acetylene welding see BS 2640.

This standard is only applicable where there is adequate access available for welding and, when required, non-destructive testing.

NOTE 2 In cases of poor access, a mechanical connection could be used.

In addition to the definitive requirements, this standard also requires the items detailed in clause 2 to be documented. For compliance with this standard, both the definitive requirements and the documented items have to be satisfied.

NOTE 3 The titles of the publications referred to in this standard are listed on the inside back cover.



Welding using manual, automatic or semi-automatic processes. Welding consumables, preparation for welding, butt joints, branches, attachments, flanges, testing and inspection, acceptance requirements for optional non-destructive testing, procedure and welder approval tests.

Standard NumberBS 2971:1991
TitleSpecification for class II arc welding of carbon steel pipework for carrying fluids
StatusConfirmed
Publication Date1991-06-28
ReplacesBS 2971:1977
DescriptorsSteels, Defects, Aligned, Pipe couplings, Pipes, Non-destructive testing, Flanges, Diameter, Welding, Heat treatment, Unalloyed steels, Acceptance (approval), Welded joints, Bend couplings, Welders, Butt joints, Class II welding, Electric welding, Pipe junctions, Designations, Pipelines, Welded flanges, Dimensions, Heating, Gas-shielded welding, Size, Visual inspection (testing), Angles (geometry), Design, Arc welding
ICS25.160.10 Welding processes
CommitteeWEE/36
ISBN0 580 19384 5
PublisherBSI
Pages38

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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