This Document specifies the classification, code, ordering details, manufacturing process, technical requirements, inspection rules, packaging, marking, and quality certificate for seamless steel pipes used in shipbuilding; and describes the corresponding test methods. This Document applies to seamless carbon steel, carbon manganese steel, alloy steel, and stainless-steel pipes (hereinafter referred to as steel pipes) used in the manufacture of ship pressure piping systems, boilers, and superheaters.
Basic Data
Standard ID
GB/T 5312-2025 (GB/T5312-2025)
Description (Translated English)
Seamless steel tubes and pipes for ship
Sector / Industry
National Standard (Recommended)
Classification of Chinese Standard
H48
Classification of International Standard
77.140.75
Word Count Estimation
27,260
Date of Issue
2025-08-29
Date of Implementation
2026-03-01
Older Standard (superseded by this standard)
GB/T 5312-2009, GB/T 31928-2015
Issuing agency(ies)
State Administration for Market Regulation; Standardization Administration of China
