... (round/square)* Seamless tube* Pipe fitting* FlangeStandard: ASTM, JIS, EN, BS, GB, DIN and etc.Material: 304, 321, 316L, 347L, 310S ... 3 surface: 120 #, 180 #NO 4 surface: 240 #, 3,220 #, 400 # HL surface NO 3 surface: 80 #, 120 #, 180 #NO 4 ... surface: 240 #, 320 #, 400 #Application: Line Pipe, Casing And Tubing, Fluid Pipe, Water Delivery ...