... 4438,1.4541 ,ST33,ST37,ST37.2,ST35.8,ST35.4,ST42,ST42.2,ST45.8,ST45.4,ST52.4,ST52,TT ST35N ... ,etc4)O.D.&Wall thickness:Seamless DN15~DN1000 (1/2” ~ ... SCH XXSERW: DN15~DN1200 (1/2” ~ 48”),W.T..: SCH 5~ SCH XXSLSAW: DN200~DN1400 (8"~56"),, W.T.: 8mm ~ 60mmSSAW ... JIS G3452,G3454,;DIN1629,DIN17175,DIN2448 Seamless,welded ST37.2/ST52.4/ST35.8 carbon black Steel Pipe