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Help CenterASTM A106 Gr.B Seamless Carbon Steel Pipe Sch40 6m DN100 NPS 4 for Oil and Gas Pipelines
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Hemaokang Steel (Shandong) Co., Ltd. is proud to offer the ASTM A106 Gr.B Seamless Carbon Steel Pipe Sch40 6m DN100 NPS4, a premium-grade solution designed for demanding oil and gas pipeline applications. As a growing enterprise with annual export value exceeding US$50 million and ISO9001 certification, we ensure every pipe meets rigorous quality standards. Our seamless carbon steel pipe combines high strength, pressure resistance, and long service life, making it the reliable choice for energy transmission systems worldwide.
This pipe is manufactured to ASTM A106 Grade B specification, which is the standard for high-temperature service carbon steel seamless pipes. The Schedule 40 wall thickness provides optimal balance between strength and weight, while the 6-meter length and DN100 (NPS4) diameter fit common oil and gas pipeline layouts. Below are key features and technical specifications that demonstrate its superior performance.
Key Features & Benefits
- Seamless Construction: No welded seams, eliminating weak points and ensuring uniform strength throughout the pipe. Suitable for high-pressure gas and liquid transportation.
- High-Temperature Resistance: ASTM A106 Gr.B offers excellent mechanical properties at elevated temperatures, making it ideal for steam, water, and oil pipelines in refineries and power plants.
- Sch40 Wall Thickness: Provides robust pressure containment capability while maintaining workability for bending, flanging, and welding.
- Standardized Dimensions: DN100 (NPS4) with 6-meter length reduces fitting waste and simplifies installation in long-distance pipeline projects.
- Corrosion Protection Options: Available with black painting, varnish coating, or anti-corrosion wrapping (3PE, FBE) upon request to extend service life in harsh environments.
- Full Traceability: Each pipe is marked with heat number, grade, size, and ISO9001 certification number for complete quality assurance.
Technical Specifications
| Parameter | Value |
|---|---|
| Standard | ASTM A106 Gr.B |
| Material | Carbon Steel (C: ≤0.30%, Mn: 0.29-1.06%, P: ≤0.035%, S: ≤0.035%, Si: ≥0.10%) |
| Wall Thickness | Schedule 40 (6.02 mm for NPS4) |
| Outside Diameter | 114.3 mm (NPS4) |
| Length | 6 meters (custom lengths available) |
| Tensile Strength | ≥ 415 MPa |
| Yield Strength | ≥ 240 MPa |
| End Finish | Plain ends, beveled ends (for welding), or threaded coupling |
Application Advantages
- Oil & Gas Pipelines: Withstands high pressure and corrosive media, suitable for onshore and offshore transmission lines.
- Refining & Petrochemical: Handles high-temperature steam, hydrocarbons, and process fluids reliably.
- Power Generation: Used in boiler tubes, superheaters, and steam lines where thermal stability is critical.
- Construction & Infrastructure: Ideal for structural supports, piling, and water treatment systems.
By choosing Hemaokang Steel’s ASTM A106 Gr.B seamless pipe, customers benefit from cost-effective logistics (our Liaocheng, Shandong location offers easy access to Qingdao Port), flexible customization (length, coating, end finish), and consistent quality backed by ISO9001-certified production processes. Our 51-100 dedicated employees and US$50-100 million annual export capacity ensure prompt delivery for projects of any scale.
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. Both are carbon steel, but A106 has stricter chemical requirements for elevated temperature use. Our pipe is manufactured to ASTM A106, which is often preferred for refinery and power plant applications. -
Q: Can this pipe be used for underground gas transmission?
A: Yes, with appropriate anti-corrosion coating (such as 3PE or FBE) and proper cathodic protection, it is suitable for buried gas pipelines. Please contact our sales team to select the best coating option. -
Q: What is the minimum order quantity (MOQ)?
A: For standard sizes like DN100 Sch40, we can accommodate small trial orders of 10 tons. For bulk projects, we offer competitive pricing on 100+ tons. Contact us for specific MOQ based on your requirements. -
Q: Does the pipe come with a mill test certificate?
A: Absolutely. Every shipment includes a Mill Test Certificate (MTC) per EN 10204 Type 3.1, showing chemical composition, mechanical properties, and heat treatment details. Third-party inspection (e.g., SGS, BV) is available upon request. -
Q: How long is the lead time for 6-meter Sch40 pipes?
A: Typically 15-20 days after order confirmation for standard sizes. Custom lengths or coatings may require 25-30 days. We can also provide expedited shipping for urgent orders. -
Q: Are the pipe ends prepared for welding?
A: Yes, we can supply with plain ends or beveled ends (30° bevel, 1.6 mm root face) as per ASME B16.25. Threaded ends or coupling are also available. Please specify your requirement when ordering. -
Q: What payment terms do you accept?
A: We accept T/T (30% deposit, 70% before shipment), L/C at sight, and for long-term partners, we can negotiate flexible terms. All transactions are secured by our ISO9001 management system. -
Q: Can you provide samples for testing?
A: Yes, sample pipes (short lengths) are available for freight-collect basis. We recommend testing to verify wall thickness, chemical composition, and pressure rating match your project needs.
Trust Hemaokang Steel – Your Reliable Partner in Carbon Steel Pipes
Since our establishment in 2025, we have rapidly grown into a global supplier serving markets across North America, South America, Europe, Asia, Africa, and Oceania. Our ISO9001-certified facility, combined with a dedicated team of 51-100 professionals, enables us to deliver over US$50 million worth of high-quality steel products annually. When you choose our ASTM A106 Gr.B seamless pipe, you are choosing a product backed by rigorous quality control, on-time delivery, and responsive customer support. Contact us today for a quote or technical consultation – let us help you build pipelines that last for decades.
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