1/Square stainless steel pipe/tubes 2/.Materials: Q195,Q235,Q345 3.Standard : ASTM Square stainless steel pipeSell square stainless steel pipe,seamless steel tube,SSTU,weldless pipe, seamless steel pipe . Sell stainless steel pipe,seamless steel tube,SSTU,weldless pipe, seamless steel pipe .1.Specification: WT: 0.5-15,OD:15-500mm2.Materials: 304, 304L, 316, 316L, 321, 310, 310Sand 3173.Standard : ...