Introduction
The Cold Drawn Seamless Heater Tubes are high precision non-welded steel tubes manufactured by cold drawing process. These tubes are designed for heat exchangers, boilers and heater systems which require high pressure, high temperature and uniform wall thickness.
Features
High dimensional accuracy
Our products adopt cold-drawn precision processing technology, and the outer diameter and wall thickness of the finished pipe are uniform and consistent, with strict tolerance control. Usually the OD tolerance can reach ±0.05mm.
Excellent thermal conductivity
The cold-drawn seamless structure has no weld interference, uniform wall thickness, and better thermal conductivity than welded steel pipes.
Excellent surface quality
After the cold-drawn process combined with annealing treatment, the inner and outer surfaces of the product are smooth, without oxide scale, cracks and burrs.
Excellent adaptability
We can provide a variety of standards (such as ASTM, EN, GB) and materials (such as SA179, SA192, T11, T22) according to different working conditions of customers, support non-standard sizes, cut to length, bevel processing and other services, greatly improving the flexible stocking and terminal matching capabilities of wholesalers.
ASTM A556 Chemistry Composition%
|
Grade |
C max |
Mn |
P max |
S max |
|
A2 |
0.18 |
0.27-0.63 |
0.035 |
0.035 |
|
B2 |
0.27 |
0.29-0.93 |
0.030 |
0.030 |
|
C2 |
0.30 |
0.29-1.06 |
0.030 |
0.030 |
ASTM A556 Mechanical Properties
|
Grade |
Tensile Strength MPa min |
Yield Strength MPa min |
Elongation in 50mm % min |
|
A2 |
47 (320) |
26(180) |
35 |
|
B2 |
60(410) |
37(260) |
30 |
|
C2 |
70 (480) |
40 (280) |
30 |
Why Choose Us
Reliable Product Quality
We prioritize long-term partnerships by delivering steel products with stable, traceable quality that meets international standards and client specifications.
Strong Inventory and Sales Capability
With a rolling stock capacity of over 15,000 tons and monthly sales exceeding 30,000 tons, we ensure timely supply and efficient delivery for large-scale and urgent orders.
Comprehensive One-Stop Steel Procurement Service
Leveraging our deep integration within China's specialized steel trade ecosystem, we provide sourcing, inspection, logistics, and export documentation support-streamlining procurement for global buyers.
OEM and ODM Customized Services
As a leading steel pipe stockist and distributor in China, we provide a full range of OEM and ODM solutions to meet the needs of global customers. We support specifications, materials, surface treatment, packaging and brand customization.
FAQ
Q: What are the main advantages of cold drawn seamless heater tubes for heat transfer systems?
A: Cold drawn seamless tubes offer excellent strength, uniform wall thickness, and a smooth inner surface. These features ensure efficient heat transfer, resistance to high pressure and temperature, and a longer service life, which are critical in boilers and heat exchangers.
Q: How accurate are the dimensions of cold drawn seamless heater tubes?
A: The cold drawing process ensures tight dimensional tolerances-typically ±0.1mm or better-making these tubes ideal for systems that require precise fit-up and consistent fluid flow. This reduces leakage risks and improves thermal performance.
Q: What standards do these tubes comply with, and is third-party inspection available?
A: Common standards include ASTM A179, ASTM A192, and EN 10216-2, covering both low and high-pressure applications. Most reputable manufacturers offer third-party inspections and certificates (e.g., TÜV, SGS, BV) to verify chemical composition, mechanical properties, and dimensional accuracy.
Q: How do cold drawn seamless tubes perform under high temperature and pressure?
A: These tubes are designed to withstand elevated temperatures and internal pressures without deformation or failure. The seamless structure eliminates weak points, while the cold drawing process enhances material strength and hardness, making them suitable for critical applications.
Q: What about lead time, packaging, and order flexibility?
A: Reliable suppliers typically offer flexible order quantities, short lead times (2–4 weeks depending on size/specs), and export-ready packaging (e.g., plastic caps, bundled with steel strips, and wooden boxes if needed). Custom lengths and end treatments (plain, threaded, or beveled) are also available.
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