... of the products 2..low and medium pressure boiler ,high pressure API 5L carbon seamless steel pipeA: Pipe and tube Size Range:1 ... , thickness: 0.6-60.0mmB: Surface finish: black, blank, bright and galvanized, or painted C: Length of each pipe: 500mm-16 ... , S355, SS400, A1010, SAE1045, X40, X60, A312, 304, 316 etc API 5L carbon seamless steel pipe