Q345B Square Pipe, Seamless Square Pipe
Square tubes are categorized by production process: hot-rolled seamless square tubes, cold drawn seamless square tubes, extruded seamless square tubes, and welded square tubes.
Among them, the welded square tubes are further categorized into:
1. By process - Arc Welded Square Tubes, Resistance Welded Square Tubes (High Frequency, Low Frequency), Gas Welded Square Tubes, Furnace Welded Square Tubes
2. By weld type - straight seam welded square tube, spiral seam welded square tube.
