Seamless steel pipe piercing mill 1) Material: 304, 321, 316L, 304L, 310S 2 ... 426mm 3)WT:1mm-50mm Type: Seamless Seamless steel pipe piercing mill 1). Size: OD: 4mm-426mm, WT: 1mm-50mm ... specifications according to customers' requirements Name: Seamless steel pipe piercing millMaterial:304,321.TP316L,310S,904L,347,2205,301, ... daysProductivity:26000ton/yearMOQ:1 tons seamless steel pipe piercing mill