... ) W.T 0.24--1.97 (6-50mm) material carbon steel, special carbon steel, Q235,Q345,X46,X60,X70,X80 The equipment ... range of specifications,which is specialized in producing Longitudinal Submerged Arc welding Pipeline of outside diameter from 406.4mm to 1422 ... from 3m to 12.5m,steel grade could be simple carbon steel,special type steel and low alloy steel ,the steel ...