ASTM A106 Grade B Seamless Pipe Carbon Steel — Factory Direct Supplier | Huaxia-Steel
ASTM A106 Grade B seamless pipe is the standard carbon steel pipe for high-temperature service in power plants, refineries, boilers, and process piping. Because it is seamless, it offers uniform strength around the circumference and is preferred for pressure applications where weld integrity is critical. Huaxia-Steel supplies A106 Gr.B seamless pipe from Chinese mills with full ASTM certification.
Product Overview
We stock and produce A106 Gr.B seamless pipe in common NPS and schedule combinations. Longer sizes and special wall thicknesses can be produced against mill order. All pipes are hydrostatically tested and marked in accordance with ASTM A106.
Specifications
| Item | Details |
|---|---|
| Grade | ASTM A106 Grade B |
| Size range (NPS) | 1/8″ – 36″ |
| Schedule | SCH 20, 40, 80, 120, 160, STD, XS, XXS |
| Wall thickness | 2.77 mm – 59.54 mm |
| Length | 5.8 m, 6 m, 11.8 m, 12 m (custom cut) |
| Ends | Plain end, beveled end, threaded, coupling |
| Surface | Black, varnished, 3PE, FBE, galvanized |
Available Grades
- ASTM A106 Grade A – lower strength
- ASTM A106 Grade B – standard pressure grade
- ASTM A106 Grade C – higher strength
- ASTM A53 Grade B – for lower temperature service
- API 5L Gr.B – line pipe grade
Manufacturing Standards
- ASTM A106/A106M
- ASME B36.10M
- ASTM A530 (general requirements)
- NACE MR0175/ISO 15156 (sour service option)
Applications
- Boiler and superheater tubes
- Refinery and petrochemical piping
- Steam and hot water lines
- Power generation headers
- Heat exchanger tubing
Quality Assurance
Each heat is tested for tensile strength, yield strength, elongation, hardness, and hydrostatic pressure. Chemical analysis is reported on the mill test certificate. Supplementary requirements S1, S2, S3, S4, and S5 can be applied on request.
Packing and Shipping
Pipes are bundled in hexagonal or square packs, capped at both ends, and wrapped with oilpaper or plastic film. We can pack in bulk or container depending on diameter and quantity. Marking includes grade, heat number, NPS, schedule, and length.
Why Buy ASTM A106 Gr.B Pipe from Huaxia-Steel?
- Seamless construction for reliable pressure containment
- Wide stock range and mill-order flexibility
- Full ASTM and ASME documentation
- Third-party inspection available
- Competitive mill-direct export pricing
Request a quote for ASTM A106 Grade B seamless pipe. Send us your NPS, schedule, length, quantity, and destination, and we will return a detailed offer.
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