Carbon Steel Seamless Pipe — Factory Direct Supplier | Huaxia-Steel
Huaxia-Steel supplies carbon steel seamless pipe for pressure piping, mechanical applications, boilers, and structural use. Our pipes are produced by hot piercing and rolling processes, with full certification to ASTM, API, and JIS standards.
Product Overview
Seamless carbon steel pipe is made from a solid billet that is heated and pierced to form a hollow tube. Unlike welded pipe, seamless pipe has no longitudinal seam, giving it uniform strength around the circumference and higher pressure resistance.
We stock and produce seamless pipe in common schedules from Sch 40 to Sch 160, with outer diameters from 21.3 mm to 609.6 mm.
Specifications
| Parameter | Details |
|---|---|
| Standards | ASTM A106, ASTM A53, API 5L, JIS G 3454, DIN 1629 |
| Grades | ASTM A106 Gr.B, A53 Gr.B, API 5L Gr.B / X42 / X52 / X65 |
| Outer diameter | 21.3 mm – 609.6 mm (1/2″ – 24″) |
| Wall thickness | 2.77 mm – 59.54 mm (Sch 40 – Sch 160) |
| Length | 5.8 m, 6 m, 11.8 m, 12 m, or cut to length |
| Ends | Plain end, beveled end, threaded, coupled |
Size and Weight Table (Selected Sizes)
| Nominal size | OD (mm) | Sch 40 WT (mm) | Sch 80 WT (mm) | Sch 160 WT (mm) |
|---|---|---|---|---|
| 1/2″ | 21.3 | 2.77 | 3.73 | 4.78 |
| 1″ | 33.4 | 3.38 | 4.55 | 6.35 |
| 2″ | 60.3 | 3.91 | 5.54 | 8.74 |
| 4″ | 114.3 | 6.02 | 8.56 | 13.49 |
| 6″ | 168.3 | 7.11 | 10.97 | 18.26 |
| 8″ | 219.1 | 8.18 | 12.70 | 23.01 |
Available Steel Grades
- ASTM A106 Grade A, B, C
- ASTM A53 Grade A, B
- API 5L Grade B, X42, X52, X60, X65, X70
- JIS G 3454 STPG 370, STPG 410
- DIN 1629 St 37.0, St 44.0, St 52.0
Manufacturing Standards
- ASTM A106/A106M — Seamless carbon steel pipe for high-temperature service
- ASTM A53/A53M — Pipe, steel, black and hot-dipped, zinc-coated, welded and seamless
- API 5L — Specification for line pipe
- JIS G 3454 — Carbon steel pipes for pressure service
Applications
- Oil and gas transmission
- Petrochemical and refinery piping
- Boiler and heat exchanger tubes
- Water and steam pipelines
- Structural and mechanical tubing
- Hydraulic and pneumatic systems
Quality Assurance
Each order is supported by mill test certificates and optional inspection services:
- Hydrostatic test certificate
- Non-destructive testing (UT/ET)
- Third-party inspection by SGS, BV, or TÜV
- Positive material identification (PMI)
- Dimensional and visual inspection report
Packing and Shipping
Pipes are bundled with steel straps, capped at both ends to prevent contamination, and wrapped with waterproof material. We provide loading photos, packing lists, and certificates for every shipment.
Why Buy Carbon Steel Seamless Pipe from Huaxia-Steel?
- Mill-direct pricing for all standard sizes
- API and ASTM certified production lines
- Fast quotation and stable delivery
- Custom lengths, bevels, and threading
- Full documentation and customs support
Get your seamless pipe quotation now. Send us the standard, grade, size, schedule, quantity, and destination port.
