Black hollow square steel tube
GB/T3091-2008 ASTM A53 ,BS1387
Tolerence of OD
Q195,Q195+Q235, Q235,Q345 A53 A106 A36
Ends plain or beveled/Varnish coating or not etc.
15-30 days after receiving your deposits.
Our products can be packed in bulk, or pvc bag;we also can package
as customers requirements
For Low-Pressur Fluid service Construction Foundation Piles,
Structure Building,Steel Structure Bridges,Seaports and Docks etc.
We can do special orders as customers requests
Anti-corrosion and high-temperature resistant with black painting
All the production process are made under the ISO9000.