ASTM A106 GB Carbon Steel Pipe
ASTM A106 GB seamless carbon steel pipes are designed for high-temperature and high-pressure applications. Available in Grade B/C (A106) and GB/T 8163, GB 5310 equivalents, suitable for boilers, heat exchangers, and fluid pipelines.
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Description
ASTM A106 / GB Seamless Carbon Steel Pipe
Gengfei – Your Professional Carbon Steel Pipe Supplier
Gengfei Steel specializes in manufacturing and exporting seamless carbon steel pipes that meet both ASTM and Chinese GB standards. We provide mill test certifications, third-party inspection, and fast delivery to Southeast Asia, North America, South America, Middle East, and Africa.
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Standards & Material Grades
| Standard | Grade | Typical Equivalent | Application |
|---|---|---|---|
| ASTM A106 | Grade A / B / C | – | High-temp pressure piping |
| GB/T 8163 | 10#, 20#, Q345B | ~ A106 Grade A/B | General fluid piping |
| GB 5310 | 20G, 15CrMoG | ~ A106 Grade C | Boilers, superheated steam pipelines |
Technical Specifications of ASTM A106 Seamless Pipe
| Specification | Details |
|---|---|
| Outside Diameter | 21.3mm – 630mm (1/2″ – 24″) |
| Wall Thickness | 2mm – 50mm (SCH 20 – SCH 160, XXS) |
| Length | 5.8m, 6m, 11.8m, 12m, or custom |
| Ends | Plain, Beveled, or Threaded with Coupling |
| Surface | Black painted, Anti-rust oil, Bare, Galvanized |
| Manufacturing Process | Hot rolled / Cold drawn (Seamless) |
| Density | ~7.85 g/cm³ |
Mechanical Properties
| Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Max Operating Temp |
|---|---|---|---|
| A106 Grade B | ≥ 240 | ≥ 415 | 450°C |
| A106 Grade C | ≥ 275 | ≥ 485 | 500°C |
| GB 20G | ≥ 245 | ≥ 410 | 530°C |
Applications of Seamless Carbon Steel Pipe
High-temperature steam pipelines
Boiler tubes & heat exchangers
Oil & gas transmission systems
Petrochemical plant pipelines
Fluid transport & industrial piping
Mechanical structures & processing plants
Advantages
Dual standard: ASTM A106 + GB certification
Excellent performance in high-temperature environments
Available in custom cut length and coated surfaces
Third-party inspection (SGS/BV/TÜV) available
Full set of documents: MTC, Packing list, CO, etc.
Price Reference
| Size | Grade | Standard | Price (USD/ton) |
|---|---|---|---|
| 2” SCH 40 | A106 Gr B / 20# | ASTM A106 / GB8163 | $410 – $520 |
| 4” SCH 80 | A106 Gr C / 20G | ASTM A106 / GB5310 | $480 – $580 |
| 6” SCH 60 | A106 Gr B | ASTM A106 only | $450 – $550 |
Prices vary based on steel grade, thickness, coating, and volume.
Contact our sales team for latest price.
FAQ – ASTM A106 / GB Carbon Steel Pipe
Q1: Can I use GB 20# instead of ASTM A106 Grade B?
A: In many cases, GB 20# or 20G offers similar performance and is used as an equivalent. Always confirm with engineering specifications before substitution.
Q2: Do you supply A106 + GB double-stamped pipes?
A: Yes. We supply pipes with dual certification (A106 + GB/T 8163 or 5310) for international orders.
Q3: Can I request NDT or hydro testing?
A: Yes. All pipes can undergo UT, RT, hydrotest, and PMI based on your requirements.
Q4: Do you offer cut-to-length or beveled ends?
A: Yes. We offer cutting, beveling, threading, and grooving services on request.
Contact Gengfei Steel – Seamless Pipe Supplier in China
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📧 Email: [email protected]
📞 WhatsApp / Phone: +86 191 3986 3252
🌐 Website: www.gengfeisteel.com
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