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Help CenterAPI 5L Gr.B Seamless Steel Pipe, 6 Inch Schedule 40, 12m Length, Plain End, for Oil and Gas Pipeline
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Hemaokang Steel (Shandong) Co., Ltd. proudly presents our premium API 5L Gr.B Seamless Steel Pipe — a 6-inch Schedule 40, 12-meter length, plain end product specifically designed for oil and gas pipeline applications. As a newly established company in 2025, we have already achieved an annual export value of US$50 million to US$100 million, serving markets across North America, South America, Europe, Asia, Africa, and Oceania. Our ISO9001 certification ensures that every pipe meets stringent quality standards, providing you with reliable performance and durability for demanding environments.
This seamless steel pipe is manufactured from high-quality raw materials using advanced cold-drawing or hot-rolling processes, ensuring uniform wall thickness and excellent mechanical properties. The API 5L Gr.B grade offers a perfect balance of strength and weldability, making it an ideal choice for transporting oil, gas, and other fluids under high pressure. With a 6-inch nominal diameter and Schedule 40 wall thickness, it delivers robust structural integrity while maintaining cost-effectiveness.
Below is a detailed specification table for your reference:
| Parameter | Value |
| Standard | API 5L (46th Edition) |
| Grade | Gr.B |
| Type | Seamless |
| Nominal Diameter (NPS) | 6 inch |
| Wall Thickness (Schedule) | 40 (approx. 7.11 mm) |
| Length | 12 meters (random or fixed as required) |
| End Finish | Plain End (beveled end optional) |
| Yield Strength (min) | 241 MPa (35,000 psi) |
| Tensile Strength (min) | 414 MPa (60,000 psi) |
| Chemical Composition (C max) | 0.22% |
| Application | Oil & gas pipelines, structural, fluid transport |
Key Features and Benefits:
- Superior Strength & Durability: API 5L Gr.B material provides high yield and tensile strength, ensuring long-term performance under extreme pressure and temperature variations.
- Seamless Construction: No welded seams eliminate weak points, reducing the risk of leaks and failures — critical for hydrocarbon transportation.
- Precise Dimensions: Manufactured to tight tolerances (e.g., OD tolerance ±1%, WT tolerance ±12.5%), our pipes are compatible with standard fittings and flanges.
- Corrosion Resistance: Optional external coating (FBE, 3LPE, 3LPP) and internal lining (epoxy) can be applied to extend service life in harsh environments.
- Easy Weldability: Gr.B grade offers excellent weldability, allowing for quick and reliable field joints.
- Cost-Effective: Schedule 40 wall thickness provides a good balance of strength and material cost, suitable for moderate-pressure applications.
- Global Compliance: Fully compliant with API 5L specification and ISO9001 quality management system, ensuring acceptance by international buyers.
- Customizable Lengths: While standard length is 12m, we can supply double random lengths (approx. 12m) or specific lengths upon request.
Our pipes undergo rigorous testing including hydrostatic testing, ultrasonic testing, and chemical analysis to guarantee defect-free products. Each pipe is marked with standard information for full traceability.
Trust the Reliability of Hemaokang Steel
With a team of 51–100 experienced professionals and an export footprint spanning all major global markets including North America, Europe, Asia, Africa, and Oceania, Hemaokang Steel (Shandong) Co., Ltd. has quickly established itself as a reliable partner in the steel pipe industry. Our annual export value of US$50 million–US$100 million reflects the trust our customers place in us. We are ISO9001 certified, ensuring every process from raw material procurement to final delivery meets the highest quality standards. Choose our API 5L Gr.B seamless steel pipe for your next oil and gas pipeline project — you will benefit from competitive pricing, timely delivery, and dedicated after-sales support. Contact us today for a quote or more information!
Frequently Asked Questions (FAQ)
1. What is the difference between API 5L Gr.B and ASTM A53 Gr.B?
API 5L Gr.B is specifically designed for oil and gas pipeline transportation, with stricter requirements for chemical composition and mechanical properties compared to ASTM A53 Gr.B. Our pipes are manufactured to API 5L standard, which is more suitable for high-pressure fluid service.
2. Can this pipe be used for water or gas distribution?
Yes, API 5L Gr.B seamless pipe is suitable for water, natural gas, and other non-corrosive fluids under appropriate pressure. However, for sour service (H2S), please consult us for special requirements.
3. Do you provide beveled ends or other end finishes?
Our standard is plain end, but beveled ends (30° or 37.5°) are available upon request for easier welding. Coupling or threaded ends can also be customized.
4. What is the typical delivery time?
For standard sizes like 6-inch Schedule 40, we usually ship within 15–30 days after order confirmation, depending on quantity. Express delivery can be arranged for urgent orders.
5. How do you ensure the quality of the pipes?
We have a strict quality control system following ISO9001. Each pipe is tested by hydrostatic pressure (up to 100% of specified test pressure), nondestructive testing (UT), and dimensional inspection. Mill test certificates are provided.
6. Can you supply smaller quantities for trial order?
Certainly. We welcome small trial orders to test our product quality and service. Minimum order quantity may apply, but we are flexible for new customers.
7. What packaging options are available for export?
Our pipes are packed in bundles with steel straps, or loose in containers with protective caps on ends. For sea freight, we use waterproof wrapping and wooden crates if required to prevent damage.
8. Do you offer third-party inspection?
Yes, we accept inspection by recognized third-party agencies such as SGS, BV, or Intertek. The cost is negotiable.
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