Cangzhou yongwang pipeline manufacturing co., ltd manufacture steel flange, ( wn flange, so flange, blind flange, ) ( rf, rtj, ff), the material mainly include a105, a105n, 304, 304l, 316, 316l www.Pipefitting88.Com And the size from 1/2"-48" 150lb, 300lb, 400lb, 600lb
