... ,TP304LTP321,TP316Ti,TP310S,etc. Manufacture process:cold d. steel welded pipes tubeStankard:ASTM A312/A312MGrade:TP304,TP304LTP321,TP316Ti,TP310S,etc.Manufacture ... draw or cold roll,Anne aled,and pickled.steel welded pipes tubeStankard:ASTM A312/A312MGrade:TP 304,TP304LTP321,TP316Ti,TP310S,etc ... :SCH5S,SCH10S,SCH 40S,SCH80S,SCH160 etc.or Non-regula r sizes as req uested. ----maya-