... 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:TP304,TP304LTP321,TP316Ti,TP310S,etc ... roll,Annealed,and pic kled.Testing:visual check for surface,and maicrometer for the W.T and O.D.Specification: ...