Black hollow square steel pipe parameters:
Wall thickness: 0.5mm-16mm
Length: 5.5 meters, 5.8 meters, 6 meters, 11.8 meters, 12 meters, etc., other length can be selected according to user requirements.
External diameter: 6.5 x6.5mm - 400 x400mm
Tolerance: wall thickness ± 0.05mm length ±6mm diameter ± 0.3mm
Blacksteel pipe nipples shape: round, square, rectangle, oval, etc.
Material: Q195-Q345, 10 # -45 #, 195-Q345, Gr.B-GR.50, din - s235jr
Technology: cold rolling, hot rolling.
Black hollow square steel tube packing:
Packing with steel straps or loose non-woven fabric or according to customer's requirement
Black hollow square steel pipe application:
Civil engineering, construction, steel tower, shipyard, scaffold, pillar, anti - landslide pile and other structures