... equipment line. 3.CE,ISO,ASTM A500,JIS ASTM A500 Galvanized Rectangular Steel Pipe 1. STANDARD:GB/T3094-2000, GB/T6728 ... 45#, Stainless steel, Seamless steel, Alloy steel.3. SURFACE:Bared, Galvanized, Oiled, Color Paint, 3PE; Or Other Anti-corrosive Treatment.4 ... slope≤6mmEnd without cutting burrEnd with few cutting burr 7. MECHANICAL PROPERTY: Yield Strength Grade Wall thickness (mm)Yield strength ( ...