boiler and other pressure vessel Thickness: 6 to 60mm Width: 1, 500 to 3, 000mm Length: 6, 000 to 12, 000mm Steel grades: ASTM A515: 65 and 70 ASTM A516: 55, 60, 65 and 70 ASTM A537: 1, 2 and 3 ASTM A662: A, B and C 20R, Q345R, 20g, Q345g