T/QGCML 4937-2025 Active Group standards

T/QGCML 4937-2025 Welding technology specifications for structures made of steel that will be exposed to ultra-low temperature environments

Publish Date: 2025-06-21 Implement Date: 2025-07-06 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: T/QGCML 4937-2025

Standard Type: Group standards

Standard Status: Active

is_force_gb: no

CCS Name: -

ICS Name: Comprehensive steel products

Publish Date: 2025-06-21

Implement Date: 2025-07-06

Scope

Main technical content: This document specifies the basic requirements for the welding of structural steel in ultra-low temperature environments, welding process evaluation, welding material selection, welding process, welding quality inspection and acceptance, welding defects and their treatment, and safety and environmental protection requirements. This document is applicable to the welding of low-alloy structural steel grades Q690 and below in environments below -20°C.