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we can supply the following specification, standard, material pipes.
Square steel tube wall thickness: 30*30-800*800mm: 3.0-30mm,
Rectangular steel tube wall thickness: 50*30-800*300: 3.0-30mm
ERW pipe:Φ 48-1420mm wall thickness: 2.5-60mm
Seamless steel pipe:Φ 60-1020mm wall thickness of 3.0-60mm
EN10210\EN10219:S235JRH\S275\S275J2H\S355JOH\S355J2H
ASTM A500:A\B\C\D
JIS G3466 STKR:400\490
GB/T6728-2002\GB/T3094-2012:Q235B\Q345B\Q345D