标准规范:

设计标准/Design:GB/T12224 GB/T12237 

v结构长度/Face to Face:GB/T12221

法兰接端/End Flange:GB/T9113.1

壁厚/Wall Thickness:GB/T12224-2005

检验与测试/Inspecction & Testing:

GB/13927.AP1598