Material classification
Square pipes are divided into: ordinary carbon steel square pipes and low alloy square pipes .
1. General carbon steel is divided into: Q195 , Q215 , Q235 , SS400, 20# steel, 45# steel, etc.
2. Low alloy steel is divided into: Q345, 16Mn, Q390 , ST52-3, etc.
Production standard classification
Square management is divided into : national standard square management, Japanese standard square management, British standard square management, American standard square management, European standard square management, and non-standard square management.
Section shape classification
Square pipes are classified by section shape :
1. Simple cross-section Square Tube: square square tube, rectangular square tube .
2. Complex cross-section square tubes: flower-shaped square tubes, open-shaped square tubes, corrugated square tubes, and special-shaped square tubes .
Surface treatment classification
Square pipes are divided into surface treatment : hot-dip galvanized square pipes , electro-galvanized square pipes, oiled square pipes, and pickled square pipes.
Use classification
Square pipes are classified by purpose: square pipes for decoration, square pipes for machine tools and equipment, square pipes for machinery industry , square pipes for chemical industry, square pipes for steel structures, square pipes for shipbuilding, square pipes for automobiles, square pipes for steel beams and columns , and special purpose square pipes.
Wall thickness classification
Square Rectangular pipes are classified according to wall thickness: super thick wall square rectangular pipes, thick wall square rectangular pipes and thin wall square rectangular pipes.
