High Yield / Carbon Steel
API 5L X42, X46, X52, X56, X60, X65, X70, and X80
High yield carbon steel pipes manufactured to API 5L X grades are designed for demanding pipeline applications where high structural strength and reliability are required. These materials are used for the transportation of gas, water and oil within pipeline systems, primarily in the oil and natural gas industries.
Compared to standard carbon steel line pipe, high yield carbon steel offers higher allowable stresses and improved resistance to deformation under internal pressure, bending and dynamic loads. When properly designed and operated, these pipes support long-term system integrity under severe operating conditions.
Key Characteristics
- Manufactured according to API 5L requirements for seamless and welded line pipe
- Higher minimum yield strength compared to standard carbon steel pipes
- Improved resistance to deformation under pressure, vibration and shock
- Enhanced toughness requirements, including testing for sour service applications
- Suitable for higher pressure and temperature classes
- Re-work is not allowed and rolled grades are not acceptable under API 5L X grade requirements
- The two-digit number following the “X” indicates the minimum yield strength in thousands of psi.
Fast, Flexible, Global Delivery
Whether you need immediate delivery from stock or scheduled shipments for long-term projects, we deliver where and when you need it.
From urgent single shipments to complete packages, we tailor our delivery to your planning.
Prefer to handle logistics yourself? No problem. We offer flexible delivery terms, including Ex Works. Want us to take care of everything? We’ll arrange full-service transport, tracking, and documentation.
Get in touch to discuss the best delivery setup for your project.
Product Details
Applications – By Service and Function
High yield API 5L pipes are applied where structural loads and operational stresses exceed the limits of conventional carbon steel piping.
Typical services and functions include:
- Transportation of gas, oil and water in pipeline systems
- High-pressure pipeline applications
- Pipelines exposed to dynamic loading, vibration and shock
- Systems requiring increased resistance to mechanical deformation
- Applications where long service life and system integrity are critical
Applications – By Industry
Stainalloy supplies high yield carbon steel pipes to a wide range of industries, including:
- Upstream oil and gas
- Downstream petrochemicals
- High yield carbon steel applications in severe environments
Specific use cases include offshore, arctic and deep-well environments, as well as other demanding operational conditions where stronger X grades such as X65 are required .
Standards and Specifications
| Standard | Description |
|---|---|
| API 5L | Specification for seamless and welded steel line pipe used for conveying gas, water and oil in pipeline transportation systems. |
| API 5L X Grades | High yield grades including X42, X46, X52, X56, X60, X65, X70 and X80, with increasing minimum yield strength requirements. |
Stainalloy Capabilities
Stainalloy has more than 20 years of experience in supplying high yield carbon steel piping materials and API 5L X grades.
Key capabilities include:
- Extensive experience with API 5L X grades from X42 up to X80
- Strong technical know-how in high yield carbon steel applications
- Focus on stronger grades such as X65 for severe operating environments
- Deep understanding of toughness requirements and sour service applications
- Long-standing relationships with leading manufacturers
- Expertise in applications involving high structural stresses and demanding pressure conditions
Through this experience, Stainalloy supports clients in achieving high system integrity and long service life for critical pipeline systems .
Rowan de Visser
Senior Sales Engineer Stock
Germán Gómez
Head of Stock Sales
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