Product Overview
Bright Round Steel Pipe features precision cold-drawn manufacturing with a smooth surface finish and tight dimensional accuracy. It delivers reliable mechanical strength and consistency for hydraulic applications, automotive components, and general mechanical engineering.
Parameters
|
Material |
Q235, Q345, 20#, 45#, E355 |
|
Standards |
EN, ASTM, DIN, GB |
|
Outer Diameter (OD) |
Φ10 mm – Φ219 mm |
|
Wall Thickness (WT) |
0.75 mm – 6.0 mm |
|
Length |
Standard lengths 6 m, 9 m, 12 m; customizable |
Product Features
Processed via advanced cold-drawing lines, maintaining outer diameter and wall thickness tolerances within ±0.05 mm to minimize secondary processing for end-users.
Grade E355 and alloy materials deliver a minimum yield strength of 355 MPa, validated by third-party inspection agencies (SGS/BV) upon request.
Bright, smooth surface with specialized anti-rust oil coating, ensuring oxidation-free delivery after 30+ days of ocean freight.
International Standard Comparison & Common Applications
|
Chinese Standard (GB) |
EN / DIN Standard |
ASTM / AISI Standard |
Common Applications |
|
Q235 |
E240 / S235JR |
A36 / 1023 |
General structural parts, low-stress mechanical components |
|
Q345 (Q355) |
S355JR / S355J2 |
A572 Grade 50 |
Heavy-duty machinery, automotive chassis, structural frames |
|
20# |
E235 / C20E (1.1151) |
1020 |
Hydraulic lines, general machining, automotive tubing |
|
45# |
E355 / C45E (1.1191) |
1045 |
High-strength mechanical parts, drive shafts, industrial rollers |
|
- (Precision Grade) |
EN 10305-1 E355 |
1035 / 1040 |
Hydraulic cylinders, high-pressure automotive components |
Value-Added Processing Services
Precision Cutting: Custom cut-to-length services with tight length tolerances to eliminate off-cut waste at your facility.
End Finishing: Professional deburring and beveling options for smooth welding or fitting installation.
Specialized Surface Protection: Beyond standard anti-rust oil, we offer phosphating and blackodising treatments upon request to enhance corrosion resistance and oil retention for hydraulic systems.
Manufacturing Process
Raw Material Preparation: Select high-grade steel billets/tubes that meet standard requirements.
Cold Drawing: Processed through precision cold-drawing lines to achieve target outer diameter, wall thickness, and smooth surface.
Heat Treatment & Straightening: Relieve internal stress and stabilize mechanical performance based on steel grades.
Surface Treatment: Cleaning, precision finishing, and anti-rust oil or specialized coating application.
Final Packaging & Dispatch: Cutting, final measuring, and secure packaging.
Strict Quality Control Process
Incoming Material Verification: 100% spectroscopic chemical analysis before feeding into production.
In-Process Dimensional Tracking: Continuous laser gauge monitoring during cold drawing to maintain ±0.05 mm tolerances.
Advanced Non-Destructive Testing (NDT): Strict eddy current testing or hydrostatic testing to eliminate inner and surface defects.
Batch Mechanical Testing: Rigorous tensile strength, yield strength, and elongation tests per production batch.
Full Traceability System
Heat Number Stenciling / Color Coding: Each bright round steel pipe or bundle is clearly marked with its unique heat number and grade identification.
Secure Tagging: Weatherproof and tear-resistant labels are securely attached to every bundle, detailing the outer diameter, wall thickness, length, steel grade, and bundle weight.
End-to-End Tracking: From production logs to export shipping documents, our tracking system allows us to trace back the exact manufacturing parameters and raw material supplier for any delivered pipe.
Packaging & Shipping Standards
Standard Export Packaging: Both ends protected with plastic caps, bundled securely with steel strips, and wrapped in waterproof woven bags to prevent transit damage.
Customized Logistics: Options for heavy-duty wooden box packaging, container loading optimization, and customized stencil or label marking for brand distribution.
FAQ
Q: What is your Minimum Order Quantity (MOQ) for custom sizes or non-standard steel grades?
A: Our standard MOQ is typically 5 metric tons per size, but we can discuss smaller trial orders depending on current production schedules and material availability.
Q: How do you handle third-party inspections like SGS or BV prior to shipment?
A: We fully cooperate with designated third-party inspection agencies and allow buyers or their representatives to conduct on-site factory audits and random sampling before loading.
Q: What are your standard payment terms for new wholesale or distribution partners?
A: We generally accept T/T with a deposit and balance against copy of B/L, or irrevocable L/C at sight, subject to credit evaluation for long-term partners.
Q: Can you provide customized packaging solutions or stencil marking for our brand distribution?
A: Yes, we offer customized bundling, waterproof wrapping, and specific stenciling or label printing on each steel pipe according to your branding requirements.
Q: What is the typical lead time from order confirmation to port delivery?
A: Production typically takes 15 days depending on the order volume, plus local logistics time to the designated export port.
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