... flanges of pipeline, valves, pumps, heat exchangers, columns, manhole and hand hole. It has a wide application in petrochemical, mechanical, electric power ... , ss304L ,316, 316L, ss31803, inconel , monel,SS32205,Hastelloy, Ti, Alloy Inner ring and outer ring/Q235, SS304 , ss304L ,316, 316L, ss31803, inconel ...