... , rectangular pipes, welded pipes, mirror-polish pipes, and special pipes Stainless Steel Pipe1) Types: seamless pipes, square pipes, rectangular pipes, welded pipes ... draw and cold rolled 3) OD: 6 to 630mm 4) WT: 1 to 40mm 5) Grades: 321, 304, 304L, 316, 316L ... ; space, War Industry, Hardware, Boilers, Heat Exchangers, Ships And Electricity stainless steel Pipe