st37.4 seamless steel pipes & tubes 1.Standard:DIN,ASTM ... ,N80; st37,st42,st42-2,st45.8,st52,Gr 20,STPG410,STPG480,STB410Size1"-24"(33.4mm ... QuantityAccording to customer's requirementProductivity4000 Tons /month seamless steel pipes.Environment of plant; factory environment1. Factory covers ... with qualified products. Production workshop of seamless steel pipePerforating equipments: Contain 1 set of 50 ...