GB/T 18669-2025 Active
GB/T 18669-2025 Steel for ship anchor chain and offshore mooring chain cables
Abstract
This document specifies the grades and codes, order content, dimensions, shapes, weights, technical requirements, test methods, inspection rules, packaging, marking, and quality certificates for marine anchor chain steel (grades M2, M3, and M4) and mooring chain steel (grades R3, R3S, R4, R4S, R5, and R6).
This document applies to hot-rolled marine anchor chain steel with a nominal diameter of 13 mm to 225 mm, and hot-rolled mooring chain steel with a nominal diameter of 30 mm to 250 mm used in floating production systems for offshore oil extraction, semi-submersible drilling platforms, single-point mooring chain structures, floating production and storage offshore vessels, and other marine development facilities (hereinafter referred to as round steel).
General Product Information
| Document Type | National standards |
|---|---|
| Standard Status | Active |
| Standard Code | GB/T 18669-2025 |
| CCS | Steel shapes and special-shaped steel |
| ICS | Steel sections |
| Implement Date | 2026-01-01 |