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