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Help CenterCarbon Steel Pipe for Oil and Gas Conveyance, Seamless, API 5L X52, Custom Length, NACE Compliant
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At Hemaokang Steel (Shandong) Co., Ltd., we focus on supplying high-grade API 5L X52 seamless carbon steel pipe for oil and gas conveyance projects that demand reliable strength, stable quality, and controlled manufacturing. Our engineers understand that pipeline integrity directly impacts safety and operating cost, so we deliver pipes with a seamless body, strict dimensional tolerances, and NACE-compliant material choices for corrosive or sour environments. Every production batch is managed under our ISO9001 quality system and is traceable from raw material to finished goods. With competitive lead times and a flexible approach to custom lengths, we support both standard replenishment orders and project-based specifications. We also serve buyers with different project scales, from single-section replacement to periodic procurement for large pipeline construction.
Key Product Features
- Seamless structure — no longitudinal welds to weaken the pipe under internal pressure, providing a stronger pressure-bearing body.
- API 5L X52 grade — minimum yield strength of 52,000 psi (about 360 MPa) makes it suitable for high-stress pipeline service.
- NACE-compliant options — material and hardness controls can be arranged for H2S-containing media when required.
- Custom lengths — pipe can be cut to your order requirement to reduce field welding joints and installation time.
- Multiple end finishes — plain ends, beveled ends, or threaded ends are available upon request.
- Dimensional control — outside diameter, wall thickness, and straightness are checked to keep installation smooth.
- Supplementary testing — hydrostatic testing, hardness testing, impact testing, and third-party inspection can be arranged.
Typical Technical Parameters
| Parameter | Value / Description |
| Standard | API 5L |
| Grade | X52 (PSL1 or PSL2 available according to project requirement) |
| Product Type | Seamless |
| Material | Carbon steel |
| Length | Custom length as buyer specified, subject to production limits |
| End Finish | Plain end / beveled end / threaded end, with protective caps if needed |
| Surface Condition | As rolled, black painted, oiled, or coated (optional) |
| NACE Compliance | Applicable NACE/ISO sour-service requirement can be met |
| Quality System | ISO9001-certified management |
| Inspection | Manufacturer inspection, documentary control, and optional third-party inspection |
Typical Mechanical Requirements per API 5L for Grade X52
| Property | Value |
| Yield strength, minimum | 52,000 psi / 360 MPa |
| Tensile strength, minimum | 66,700 psi / 460 MPa |
| Elongation | In accordance with API 5L requirements |
| Hardness | Controlled where NACE criteria apply |
| Impact test | Available upon request |
Typical Applications
This seamless pipe supports a wide range of duties in energy and industrial fluid transport, including crude oil gathering lines, natural gas transmission networks, water injection systems, and refinery piping where carbon steel is appropriate. The combination of X52 strength and optional NACE compliance makes it a practical choice for projects with sour crude or gas exposure. End users also use this pipe for structural and mechanical applications requiring high strength and pressure resistance. Before production, we can confirm applicable service conditions, design codes, and testing criteria with the buyer so the supplied pipe matches the actual operation environment.
Customer Benefits
- Lower total installation cost through custom length supply and beveled ends for faster welding.
- Reduced maintenance risk due to the seamless body and controlled manufacturing process.
- More flexible procurement because the supplier accepts project-based specifications.
- Better traceability with batch numbers, material certificates, and report files for each heat number.
- Improved supply chain efficiency with shipments from Qingdao Port and clear export documentation.
Why Choose Hemaokang Steel
Hemaokang Steel (Shandong) Co., Ltd. operates an export-oriented supply structure and has achieved an annual export value of US$50 million to US$100 million. Our team of 51–100 employees handles inquiries from customers in North America, South America, Europe, the Middle East, Southeast Asia, Africa, and Oceania, and we are experienced in documentation, packing, and logistics arrangements. The company is based in Liaocheng, Shandong, one of China’s key steel pipe production areas, and ships from Qingdao Port for efficient international delivery. Under our ISO9001 quality system, we provide mill test certificates and traceable batch records for every order. We also provide flexible commercial terms such as FOB, CIF, or CFR shipments, and we respond with clear technical proposals. Contact us with your required diameter, wall thickness, length, end preparation, and NACE requirements to receive a tailored quotation.
Frequently Asked Questions
Q: What does API 5L X52 mean?
A: API 5L is a specification issued by the American Petroleum Institute that covers line pipe used in oil and gas transportation. X52 refers to the steel grade: it requires a minimum yield strength of 52,000 psi (about 360 MPa). A higher number normally means stronger material.
Q: Is the pipe NACE compliant?
A: Our X52 pipe can be manufactured to meet applicable NACE requirements for sour service when specified in the order. The exact NACE/ISO standard, test method, and additional controls such as hardness and HIC testing should be confirmed before production so the final pipe fits your project conditions.
Q: What length options do you offer?
A: We support custom lengths. You may specify the pipe length, and we will schedule production or cutting accordingly. Certain length ranges may require specific production capacity and transport conditions; we will confirm feasibility in our quotation.
Q: Can you supply PSL2 pipe or additional testing?
A: Yes. PSL1 and PSL2 requirements can be provided upon request. Supplementary tests such as hydrostatic testing, Charpy impact testing, hardness testing, and third-party inspection are also available as order options.
Q: What end preparations are available?
A: We offer plain ends, beveled ends, and threaded ends depending on your connection method. Beveling can be supplied according to common pipeline welding requirements, and protectors can be added to avoid damage during shipment.
Q: Do you provide delivery to international ports?
A: Our main port of shipment is Qingdao, China. We arrange export packing, marking, and documentation for international logistics. For destinations with special import requirements, please share your local regulations at the inquiry stage.
Q: How do you control product quality?
A: Our quality management follows an ISO9001 system. Raw material verification, in-process dimensional checks, and visual final inspection are maintained. We can also accept third-party inspection by the buyer when arranged in advance.
Q: What is the minimum order quantity?
A: Minimum order quantity may vary with pipe size and specification. We welcome small trial orders for new projects and can discuss volume requirements to provide a competitive quotation.
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