... exchanger,shipbuilding,construction,etc.Tolerancenot less than +_8% of normal wall thickness.Mill ceitificate 3.1BContact WayTianjin City ... welding neck flange: STD, SCH40, SCH80, SCH160. SCHXXSMaterial: carbon steel A105, stainless steel 304/304L, 316/316LCoating: black ... flangePressure: PN6, PN10, PN16, PN25, PN40, PN64, PN100Material: carbon steel C22.8, S235, S235JR, P235GH, stainless steel: 304/ ...