Home > steel pipe/flat bar

Ms Hollow Section Steel Tube Black Annealed Steel Square Pipe

Item No.: 00123
Black steel pipes are made of steel that has not been coated with a substrate such as zinc or paint. Since it has a dark color surface that is forms by iron oxide during the manufacturing process, it is called black steel pipe.

 Ms Hollow Section Steel Tube Black Annealed Steel Square Pipe

Wall Thickness 0.6mm-12mm
Length 5.5m-12m
Outer diameter 0.3mm-300mm
Tolerance Wall Thickness:±0.05MM   Length:±6mm  Outer Diameter:±0.3MM
Shape Round, Square, Rectangle, Oval, Deformed
Material Q195-Q345, 10#-45#,195-Q345, Gr.B-Gr.50, DIN-S235JR, JIS-SS400, JIS-SPHC, BS-040A10
Technique Cold Rolled, Hot Rolled, ERW
Surface treatment Black annealing,  bright annealing, None annealing
Standard ASTM, DIN, JIS, BS
Certificate ISO, CE
Payment terms 30% T/T deposit in advance, 70% T/T balance within 10 days after B/L copy, 100% Irrevocable L/C at sight, 100% Irrevocable L/C after receive B/L 30-120 days, O/A
Delivery times Delivered about 30 days after receipt of deposit 
Package 1. Packed with 8 bundles tightened with metal belt and plastic wrapped if need
2. According to customer's requirement
Loading port Xingang, China
Application Widely used in furniture,interior decoration, fluid pipeline, petroleum and natural gas industry, drilling, pipeline, structure
Advantages 1. Reasonable price with excellent quality
2. Abundant stock and prompt delivery
3. Rich supply and export experience, sincere service

                                                 Your Trustworthy Partner In Steel Products
                                                We have a team of most professional people, who will add great value for our customers

We explore  better ways to solve customers’ needs with the iron and steel products that are the best choices for performance, cost and manufacturing efficiency




  • 19

    Production Experience

  • 650000

    Project Areas in 2018

  • 200

    Project Patent Technology

  •  10000

          Factory Area


We could producing and  supply black square tubes , round pipes,galvanized steel tubes and pipes . Our customers located in Africa, Europe, Southeast Asia and Middles East market ,including Togo, Ghana, Congo ,Malawi, Senegal, Tanzania, Angola, South Africa, Mozambique,etc. Southeast Asia: Malaysia, Singapore, Philippines, Myanmar,etc . Middle East: Iraq ,UAE, Kuwait, Qatar etc; South America : Peru, Chile, Bolivia, Panama Costa Rica etc.