This document stipulates the ordering content, classification and code, size, shape, weight and allowable deviation, technical requirements, test methods, inspection rules, marking, packaging, transportation, storage and quality certificate of hot-dip galvanized square and rectangular pipes. This document applies to the production and inspection of hot-dip galvanized square tubes and rectangular tubes (hereinafter referred to as square and rectangular tubes).
T/QGCML 1289-2023 history
2023T/QGCML 1289-2023 Hot-dip galvanized square and rectangular tube