... equipment line. 3.CE,ISO,ASTM A500,JIS ASTM A500 Galvanized Rectangular Steel Pipe 1. STANDARD:GB/T3094-2000, GB/T6728-2002 ... , Q215, Q235, Q275, Q345, 20#, 45#, Stainless steel, Seamless steel, Alloy steel.3. SURFACE:Bared, Galvanized, Oiled, Color Paint, 3PE; Or Other Anti-corrosive ... %t10mm≤t≤22mm ±6%t10mm≤t≤22mm ±6%tSuitable for flat partsSuitable for flat partsRight Angle90°±1.0°90°±1.5°Corner ...