GB/T 9125-2010
Fasteners for pipe flange joints—All- thread studs for pipe flange
GB/T 15389-1994
Thread rods
GB/T 9125.1-2020
Fasteners for steel pipe flange joints-Part 1:PN designated-All thread studs for pipe flange
GB/T 15389-2025
Threaded rods-Type A
GB/T 15389-2025
Threaded rods-Type B