GB/T 31032-2023 Welding and acceptance standard for steel pipings and pipelines

Scope

This document specifies the arc welding process for butt joints, angle joints, and socket joints of carbon steel and low-alloy steel pipes and fittings used in long-distance pipelines and gathering pipelines for crude oil, refined oil, natural gas, carbon dioxide, nitrogen, and other media.
The welding methods applicable to this document include stick electrode arc welding, submerged arc welding, gas shielded arc welding with or without melting electrodes, flux-cored wire arc welding, plasma arc welding, or combinations thereof. The welding methods include manual welding, semi-automatic welding, motorized welding, automatic welding, or combinations thereof. The welding positions include fixed welding, rotating welding, or combinations thereof.
This document also specifies the requirements for welding joint inspections, including radiographic testing, X-ray digital imaging testing, X-ray computer-aided imaging testing, magnetic particle testing, penetrant testing, ultrasonic testing, fully automatic ultrasonic testing, phased array ultrasonic testing, and acceptance requirements using destructive testing.
This document is applicable to welding for new, modified, and expanded pipelines, as well as in-service pipelines.

Development Information

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