WE ARE SPECIALISED IN MANUFACTURING STAINLESS STEEL SEAMLESS PIPE AND TUBE SIZE:6-830MM*0.9-60MM ... We are an export company with our own mill manufacturing stainless steel seamless pipes and tubes. The material: 201,304,304L,316L,321 ... ,904L,TP410,TP420,TP430,TP405, as well as duplex phase stainless tube UNS S31803,S32304,S32750.,etc. The Standard:ASTM A312 ...