Product Overview
Standard Black Pipe is an ERW welded steel pipe designed for structural and fabrication applications, providing dependable performance, dimensional consistency, and economical material selection for industrial projects.
Specifications
|
Production Standards |
ASTM A53/ASTM A500/EN 10219/GB/T 3091/JIS G3444/Custom standards available upon request |
|
Outer Diameter Range |
Round tube: Φ21.3mm – Φ508mm Square tube: 20×20mm – 400×400mm Rectangular tube: 20×40mm – 300×500mm |
|
Wall Thickness Range |
0.75mm – 16mm |
|
Length |
5.8m / 6m / 12m or standard length |
|
Material |
Q195/ Q235B/Q345B/ ASTM A36/S235 / S355 |
|
Surface Treatment |
Anti-rust Varnish / Rust-preventive oil / Hot-dip galvanizing / Powder coating |
|
Surface Condition |
Black raw tube |
|
Forming Method |
High-frequency resistance welding |
|
Supply Capacity |
Supports large-volume long-term orders OEM/Custom processing available |
Product Advantages
1. Rigorous Weld Integrity (HFRW):
Advantage: Advanced automated welding paired with online seam heat treatment.
Reliability: Eliminates internal residual stress and passes strict hydrostatic pressure and flattening tests per international standards.
2. Precision Dimensional Tolerance:
Advantage: Laser-monitored sizing mills ensure uniform outer diameter and wall thickness.
Reliability: Reduces on-site fabrication welding errors and installation time for contractors.
3. Export-Grade Surface Protection:
Advantage: Uniform anti-rust oil or paint coating applied immediately post-production.
Reliability: Prevents oxidation during ocean transit, ensuring cargo arrives in mill-fresh condition.
Customization & Value-Added Services
Cutting to Length: Precise sawing and cutting to specific project dimensions.
End Processing: Custom threading, coupling, and pipe beveling.
Surface Customization: Special coating thickness or alternative protective oils upon request.
OEM & Private Labeling: Bundle tagging and stencil marking with your company logo or project code.
Packaging & Export Logistics
Secure Bundling: Tightly secured with heavy-duty steel strips to prevent shifting during transit.
End Protection: Plastic caps applied to both ends to protect pipe bevels and threads from damage.
Flexible Shipping: Container loading (20GP/40GP) optimized for weight distribution, with options for breakbulk vessel chartering for large-scale projects.
Primary Applications & Industries Served
Construction & Scaffolding: Structural framing, building supports, and temporary scaffolding systems.
Mechanical & Steel Fabrication: General engineering, machinery components, and automotive frames.
Fluid & Low-Pressure Conveyance: Transporting low-pressure water, air, steam, and gas (where permitted by local code).
Agricultural & Solar Equipment: Greenhouse structures and solar mounting systems.
Quality Control & Testing
Hydrostatic Testing: Every pipe is individually tested for leak tightness and internal pressure resistance.
Weld Integrity Inspection: Non-destructive testing (NDT) and online eddy current testing monitor the weld seam continuously.
Mechanical Property Tests: Regular tensile, flattening, and bending tests verify yield strength and elongation.
Mill Test Certificates (MTC): Full traceability is provided with EN 10204 3.1 certification shipped with every order.
Certifications & Regulatory Compliance
ISO 9001: Quality Management System Certification
ISO 14001: Environmental Management System Certification
Third-Party Inspection: Full cooperation with world-renowned inspection agencies including SGS, BV (Bureau Veritas), and Intertek prior to shipment.
FAQ
Q: What is your minimum order quantity (MOQ)?
A: Generally 3 metric tons per size, though trial orders and mixed-size container loads can be flexibly arranged based on our rolling schedule.
Q: Are third-party inspections accepted?
A: Yes, we fully cooperate with independent agencies like SGS, BV, and Intertek, and provide EN 10204 3.1 MTC with every shipment.
Q: What are your standard payment terms?
A: Typically 30% T/T deposit and 70% balance against the Bill of Lading copy. Irrevocable L/C at sight is also accepted for long-term partners.
Q: How do you prevent cargo damage and moisture during ocean shipping?
A: We use heavy-duty steel bundling, plastic end caps, anti-rust oil, and container desiccant bags to ensure safe arrival.
Q: What is the typical production lead time?
A: Standard production takes 15 to 25 days depending on volume, while regular stock items can be dispatched in 7 to 10 days.
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