... ) W.T 0.24--1.97 (6-50mm) material carbon steel, special carbon steel, Q235,Q345,X46,X60,X70,X80 The equipment ... Pipeline of outside diameter from 406.4mm to 1422.4mm ,wall thickness from 6m to 50m,unit length from 3m to ... 12.5m,steel grade could be simple carbon steel,special type steel and low alloy steel ,the steel ...