... : 316L, 316Ti, 304L, 321, Q235, A105 4 OD: 15-1200mm 5 Special design available 6 Stainless steel flange and carbon steel ... water supply, food and chemical industry, hospital, hotel, workshops, tourism building, industrial pipeline system, marine pipeline system, heating supply, gas pipeline ... a very strong resistance against aging and hygienic. ANSI B16.5 flange