Fire protection — Automatic sprinkler systems — Part 12: Requirements and test methods for grooved-end components for steel pipe systems
消防自动喷水灭火系统第12部分:钢管系统开槽端部件的要求和试验方法
This document specifies performance requirements, grooving dimensions, test methods and marking requirements for couplings used in the joining of grooved steel tubes, pipes, grooved-end fittings and other grooved-end components up to 300 DN nominal diameter.