... 14m 5-unit floor lathes, 4-unit rolling submerged arc automatic welding equipments with the carrying capacity of 100t-200t-300t, φ6 ... 16m annealing furnace, 4-unit CO2 gas shielded are welding equipments, 6-unit roller plate bending machines manufacturing the material with ... , ultrasonic flaw detector, X-ray flaw detector and other equipments are adopted to examine strictly the raw material and the ...