GOST R 57781-2017 玻璃钢管道及部分管道. 证明带弹性密封件的锁止插口接头(包括双插口接头)设计的试验方法
Fiberglass-reinforced thermosetting plastic pipes and parts of pipelines. Test methods to prove the design of locked socked-and-spigot joints, including double-socket joints, with elastomeric seals