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Help CenterCarbon Steel Seamless Pipe Used in Oil Refinery Piping Systems, ASTM A106 Gr.B, NPS 8 Sch 40
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Hemaokang Steel (Shandong) Co., Ltd. proudly presents our premium Carbon Steel Seamless Pipe ASTM A106 Gr.B, NPS 8 Sch 40, designed specifically for demanding oil refinery piping systems. With an annual export value exceeding US$50 million and a dedicated team of 51–100 professionals, we ensure every pipe meets rigorous quality standards. Our seamless pipes offer exceptional strength, corrosion resistance, and reliability for high-temperature and high-pressure applications, making them the preferred choice for refineries worldwide.
This product is manufactured under strict ISO 9001 quality management systems, guaranteeing consistent performance. Whether you are building new pipelines or replacing existing ones, our seamless carbon steel pipes provide a cost-effective solution without compromising safety or longevity.
Product Features & Technical Specifications
- Material: High-quality carbon steel conforming to ASTM A106 Gr.B, ensuring excellent tensile strength and ductility.
- Size: NPS 8 (Nominal Pipe Size 8 inches / DN200) with Schedule 40 wall thickness (8.18 mm).
- Manufacturing Process: Seamless hot-rolled or cold-drawn process eliminates welded seams, providing uniform strength and resistance to stress corrosion cracking.
- Application: Ideal for oil refinery piping systems, boiler tubes, heat exchangers, and high-temperature fluid transport.
- End Finish: Plain ends or beveled ends according to customer requirements; optional threading available upon request.
- Surface Coating: Standard black painting or anti-corrosion oil coating; customizable galvanizing for extra protection.
- Length: Standard 6 m or 12 m, or custom lengths up to 18 m as per project needs.
- Testing: 100% ultrasonic inspection, hydrostatic testing, and chemical analysis to guarantee compliance with ASTM A106 standards.
| Parameter | Value |
|---|---|
| Tensile Strength (min) | 415 MPa (60,000 psi) |
| Yield Strength (min) | 240 MPa (35,000 psi) |
| Elongation (min) | 30% (for 2 in. gauge length) |
| Carbon Content | 0.30% max |
| Manganese Content | 0.29% – 1.06% |
| Phosphorus (max) | 0.035% |
| Sulfur (max) | 0.035% |
| Operating Temperature Range | -29°C to 427°C (-20°F to 800°F) |
| Hydrostatic Test Pressure | Up to 2,500 psi (17.2 MPa) |
Key Benefits for Your Projects:
- Enhanced Safety: Seamless construction eliminates weak points, reducing the risk of leaks and failures in critical refinery systems.
- High Temperature Resistance: Suitable for continuous service up to 427°C, meeting the demands of oil refining processes.
- Cost Efficiency: Long lifespan and low maintenance requirements lower total cost of ownership.
- Easy Installation: Available with beveled ends for quick welding, saving labor time.
- Global Availability: Shipping to North America, South America, Europe, Asia, Africa, and Oceania with reliable logistics support.
Why Choose Hemaokang Steel?
Established in 2025 and headquartered in Liaocheng, Shandong—China’s steel pipe manufacturing hub—Hemaokang Steel has rapidly become a trusted supplier with an annual export value between US$50 million and US$100 million. Our ISO 9001 certification ensures every pipe undergoes strict quality control from raw material selection to final inspection. We serve a diverse global market, including North America, Europe, and Southeast Asia, and have shipped to over 15 major regions. Our team of 51–100 experienced engineers and sales staff is dedicated to providing prompt technical support and customized solutions. With advanced production lines and comprehensive testing facilities, we guarantee that every ASTM A106 Gr.B seamless pipe meets your exact specifications. We invite you to partner with us for your upcoming oil refinery projects—contact us today for a competitive quotation and fast delivery.
Frequently Asked Questions (FAQ)
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Q: What is the difference between ASTM A106 Gr.B and API 5L Gr.B?
A: ASTM A106 Gr.B is specifically designed for high-temperature service, while API 5L Gr.B is for line pipe applications. A106 has tighter carbon content limits and higher tensile strength for elevated temperatures. Our pipe is A106 Gr.B, suitable for refinery piping systems. -
Q: Can this pipe be used for steam service?
A: Yes, ASTM A106 Gr.B seamless pipes are commonly used for steam lines in refineries and power plants, operating at temperatures up to 427°C. -
Q: What surface treatments are available?
A: Standard options include black painting (oil-based) and anti-corrosion varnish. We also offer hot-dip galvanizing (upon request) for enhanced corrosion resistance in outdoor or marine environments. -
Q: How is the pipe end prepared?
A: By default, plain ends are provided. Beveled ends (30°–35°) for welding are available at no extra cost. Threaded connections or coupling can be added as an option. -
Q: What is the minimum order quantity (MOQ)?
A: For NPS 8 Sch 40 pipes, our MOQ is typically 1 ton for standard sizes. Custom lengths may have different MOQ. Please contact our sales team for details. -
Q: Do you provide third-party inspection?
A: Yes, we can arrange inspection by third-party agencies such as SGS, BV, or Lloyds at the buyer's cost. We also provide our own mill test certificates free of charge. -
Q: What is the delivery lead time?
A: For stock sizes (6m length), delivery is usually 7–15 days after payment. For custom lengths or special coatings, lead time is 15–25 days, depending on quantity. -
Q: How do you ensure the pipe is corrosion resistant during transit?
A: Each pipe is coated with anti-rust oil and wrapped with protective packaging (e.g., plastic film, steel bundling). For sea freight, we use moisture-proof materials to prevent corrosion.
Trust Hemaokang Steel for Your Critical Piping Needs. With our large production capacity, strict quality control, and global shipping network, we are your reliable partner in the oil and gas industry. Request a quote today and experience unparalleled quality and service.
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