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Product Spotlights
Seamless pipes: the maximum diameter is 204mm, and the minimum is 6mm.
ERW welded pipes:the maximum diameter is 256mm, and the minimum is 12mm.
Special-shaped welded pipes: accrording to customers' requirement.
Negotiable
MOQ: 1 Metric Ton (Price negotiable depending on order volume and customization)
Key Specifications
Get Latest Price
Type:
Seamless
Warranty:
1 year
Technique:
Cold Drawn
Payment & Shipping
Payment Methods:
Port of Shipment:
Shanghai
Delivery Detail:
30 days
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Type
Seamless
Warranty
1 year
Technique
Cold Drawn
Surface Treatment
Oiled
Usage
Pipeline Transport, Boiler Pipe, Hydraulic/Automobile Pipe, Oil/Gas Drilling, Food/Beverage/Dairy Products, Machinery Industry, Chemical Industry, Mining, Construction & Decoration, Special Purpose, Other
Material
Carbon Steel
Section Shape
Round
Transport Package
according to customer
Specification
6MM~204MM
Origin
China
Seamless Steel Pipe – 6mm to 204mm | Carbon Steel Pipe
Product Overview
Our seamless steel pipes are manufactured using cold drawn or hot rolled processes, offering no weld seam and uniform wall thickness. With a complete diameter range from 6mm to 204mm, these pipes are engineered for high-pressure, high-temperature, and precision-critical applications.
Diameter range: 6mm (min) – 204mm (max)
Key Specifications
| Parameter | Range |
|---|---|
| Outer Diameter | 6mm – 204mm |
| Wall Thickness | 0.8mm – 25mm (customizable) |
| Length | 3m – 12m (fixed or random) |
| Standards | ASTM A106/A53, DIN 2391, EN 10305, GB/T 8162/8163, JIS |
| Material Grades | 20#, 45#, Q235, Q345, 16Mn, 15CrMo, ST37, A36, SS400 |
| Surface Finish | Black, bare, oiled, painted, galvanized |
| Tolerance | ±1% |
Available Sizes Breakdown
| Type | Outer Diameter Range | Typical Wall Thickness | Application |
|---|---|---|---|
| Precision Tube | 6mm – 20mm | 0.8mm – 3mm | Hydraulic/pneumatic fittings |
| Standard Pipe | 21mm – 114mm | 2mm – 12mm | Structural/fluid transport |
| Heavy Wall Pipe | 115mm – 204mm | 4mm – 25mm | High-pressure systems, boilers |
Key Advantages
| Advantage | Benefit |
|---|---|
| No weld seam | Zero leakage risk under pressure |
| Higher pressure resistance | 30%+ stronger than welded pipes of same size |
| Uniform wall thickness | Perfect for threading and precision machining |
| Wide diameter range | 6mm–204mm full coverage – one-stop sourcing |
| Heat & corrosion resistant | Suitable for extreme environments |
Quality Assurance
Ultrasonic testing (UT) and eddy current testing available
Hydrostatic test upon request
Mill test certificate (MTC) provided with each batch
Chemical composition and mechanical properties verified
Processing Services
| Service | Details |
|---|---|
| Cutting | Custom lengths ±1mm accuracy |
| Threading | Male/female ends, NPT/BSP standards |
| Bending | Cold/hot bending to customer drawings |
| Surface treatment | Oiling, painting, galvanizing |
| End finishing | Beveled, plain, or threaded ends |
Common Applications
Hydraulic systems – Cylinders, fluid power lines
Oil & gas – Instrumentation lines, pipelines
Boilers & heat exchangers – High-temperature service
Precision machinery – Bearing sleeves, shafts
Structural – Scaffolding, mechanical frameworks
Automotive – Precision tubing components
Why Choose Our Seamless Pipes?
| Feature | Advantage |
|---|---|
| Complete size range | 6mm–204mm – no need for multiple suppliers |
| Stock availability | Fast delivery for standard sizes |
| Custom processing | Cutting, threading, bending in-house |
| Flexible MOQ | Small orders accepted for stock sizes |
| Competitive pricing | Direct factory pricing |
Packaging & Delivery
| Item | Details |
|---|---|
| Packaging | In bundles with anti-rust protection, seaworthy export packing |
| End protection | Plastic caps or beveled ends as required |
| Lead time | 7–15 days for stock sizes; 20–30 days for custom |
| Port | Tianjin / Shanghai / Guangzhou |
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1Yr
Business Type
Trading Company
Year Established
2021
Factory Size
50,000-100,000 square meters
Annual Export Value
Below US$1 Million
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