... longest OD we can produce is 4 metreselbow : long radius and short radius with carbon steel , stainless steel , slloy steel cap ... : ASTM(ANSI),API,BS,DIN,and JIS standards. tee : DN15---DN1200 according to the ANSI standard ... used in the smelting, foodstuff, papermaking, chemical equipment, heat exchanger and other fieledsseamless pipe Stainless Steel Pipe Fitting