ANSI B16.5 Vlekvrye staalflense vervaardiger, ASTM A182 304, 304L, 316, 316L, 316Ti, 317L, 310S, 321, 347, 904L, WN Flanges, LWN Flanges, SW Flanges, Twares Flanges, Blindflanges, So Flanges, Lap Jas Ff, RTJ, Tf Face
- Zhengzhou Huitong Pipeline Equipment Co., Ltd.