... steelAlloy steelDuplex steelNickel alloy steelCarbon steel tee, stainless steel tee, alloy steel teeASTM A234 WPB,ASTM A420 WPL6 ... years of manufacturing experience)Taishouxing steel pipe CO., LTD, as the domestic large-scale pipe manufacturing company,locates ... advanced equipments such as Intermediate Frequency Extruding Machines, Large Hydraulic Forming Machines, Lathe Machines, Sloping Machine, ...