Product Introduction
The Black Round Steel Tube is a carbon steel round tube manufactured using seamless or welded processes, featuring high strength, good weldability, and stable dimensional accuracy.
Technical Specifications
|
Item |
Specification |
|
Product Name |
Black Round Steel Tube / Carbon Steel Tube |
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Manufacturing Process |
Seamless / ERW / Cold Drawn / Cold Rolled |
|
Material |
Carbon Steel / Low Alloy Steel / Alloy Steel |
|
Steel Grade |
ASTM A53 Gr.B, ASTM A106 Gr.B, API 5L Gr.B, X42, X52, S235JR, S355JR, Q235B, Q355B, 20#, 45# |
|
Standard |
ASTM, API, EN, DIN, JIS, GB |
|
Outer Diameter |
6-630 mm / Customized |
|
Wall Thickness |
1.0-50 mm / Customized |
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Length |
3-12 m / Customized |
|
Tolerance |
According to ASTM / EN / DIN Standards |
|
End Type |
Plain End / Beveled End / Threaded / Grooved |
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Surface Treatment |
Black Finish / Oiled / Anti-Rust Coating |
|
Application |
Construction, Machinery, Automotive, Energy |
Manufacturing Process and Inspection
Raw Material Inspection: Before production, the chemical composition, mechanical properties, and surface quality of the steel are tested to ensure that the materials meet standard requirements.
Steel Pipe Forming: Seamless piercing, ERW welding, or cold drawing processes are used to control dimensional accuracy and product performance.
Heat Treatment: Annealing, normalizing, or quenching and tempering are performed according to application requirements to improve material strength and stability.
Surface Treatment: Black surface treatments, rust-preventive oil, and anti-corrosion coatings are available to meet different operating environments.
Product Inspection: We provide: Dimensional Inspection, Chemical Analysis, Tensile Test, Hydrostatic Test, Eddy Current Test, and Ultrasonic Testing.
Customization and Processing Services
Size Customization: Customization of outer diameter, wall thickness, length, and special specifications is supported.
Material Customization: Supported materials include: Carbon Steel, Low Alloy Steel, and Alloy Steel to meet different working conditions.
Pipe End Processing
Supported: Plain End, Beveled End, Threaded & Coupled, Grooved
Surface Treatment
Supported: Black Painting, Oiling, Galvanizing, Anti-Corrosion Coating
Export Packaging and Delivery
Export Packaging: Steel strapping, waterproof packaging, and pipe end protection reduce the risk of transportation damage and corrosion.
Container Loading Optimization: Optimize container loading according to product size and transportation requirements to improve transportation efficiency.
Trade Terms
Supported: FOB, CIF, CFR
Delivery Time: Fast delivery for standard specifications; lead time for customized products is confirmed based on specifications and quantity.
Application Areas
Construction Industry: Used in steel structures, supporting structures, bridges, and engineering projects.
Machinery Manufacturing: Used in machine parts, hydraulic equipment, and equipment structural components.
Energy Industry: Used in industrial piping, boiler auxiliary systems, and heat exchange equipment.
Automotive Industry: Used in automobile chassis, exhaust systems, and structural components.
Why Choose Us?
1. Advanced Production Equipment
We operate multiple high-frequency welded (HFW) pipe production lines capable of manufacturing round, square, and rectangular steel pipes. We are also equipped with cold-roll forming units for producing custom-profile sections. Downstream processing capabilities include precision cutting-to-length, punching, straightening, and surface treatment systems.
2. Guaranteed Quality
We supply certified products that meet standards such as EN 10219, ASTM A500, and ISO 1461 to engineering contractors and end-users.
3. Comprehensive Standards and Documentation
We manufacture products in accordance with ASTM, EN, DIN, JIS, and GB standards. We provide MTCs and EN 10204 3.1 certificates, and support third-party inspections by agencies such as SGS, BV, and TÜV.
FAQ
Q: Are you a manufacturer or trading company?
A: We are a professional steel pipe manufacturer, providing both production and export services.
Q: What steel grades can you supply?
A: We support carbon steel, low-alloy steel, and alloy steel, meeting ASTM, API, EN, DIN, JIS, and GB standards.
Q: Do you provide seamless and welded tubes?
A: Yes, we can provide seamless steel pipes and ERW welded pipes.
Q: What standards can you meet?
A: We support ASTM, API, EN, DIN, JIS, GB, and other standards.
Q: Can you provide customized sizes?
A: We support customization of outer diameter, wall thickness, length, material, and processing.
Q: What certificates can you provide?
A: We can provide MTC, EN10204 3.1, and third-party inspection reports.
Q: Do you support third-party inspection?
A: We support third-party inspections by SGS, BV, TUV, Intertek, and other organizations.
Q: What is your MOQ?
A: Confirmed based on product specifications, materials, and order requirements.
Q: What is the delivery time?
A: Determined based on product type, quantity, and production schedule.
Q: How do you package steel tubes?
A: We use steel strapping, waterproof packaging, and optimized container loading methods.
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