API 5L GR.B Oil and Gas Line Pipe

API 5L Grade B Oil and Gas Line Pipe is a carbon steel pipe manufactured to meet the rigorous requirements of the API 5L specification, widely used for transporting oil, gas, petroleum products, and water in both onshore and offshore pipeline systems. As one of the most commonly used grades in the API 5L standard, Grade B provides a balanced combination of strength, durability, and weldability, making it highly suitable for high-pressure, high-volume transmission pipelines.

These pipes are produced through seamless or welded methods, with seamless being preferred in critical and high-pressure applications due to their uniform structure and absence of weld seams. API 5L GR.B line pipes offer consistent performance in a variety of environments, including harsh terrains, corrosive atmospheres, and fluctuating temperatures.

The material composition includes carbon, manganese, phosphorus, sulfur, and silicon, precisely controlled to meet both PSL1 and PSL2 quality levels. PSL2 pipes offer enhanced mechanical properties, tighter chemical composition limits, and additional testing for critical operations such as sour service.

Key mechanical properties:

Minimum yield strength: 245 MPa (35,500 psi)

Minimum tensile strength: 415 MPa (60,000 psi)

Good impact toughness and fatigue resistance

Excellent weldability for field installation

Primary applications include:

Crude oil and natural gas transportation pipelines

Offshore and subsea pipeline networks

Onshore gathering and distribution lines

Refined petroleum and fuel transfer systems

Industrial water and slurry pipelines

API 5L Grade B line pipes are available in a variety of diameters (typically from 1/2 inch to 48 inches) and wall thicknesses, including standard schedules like SCH40, SCH80, and customized heavy-wall options. Pipe ends can be supplied as plain ends (PE), beveled ends (BE), or threaded ends (TE), depending on project needs.

To ensure consistent quality and performance, all pipes are subjected to stringent testing, including hydrostatic pressure testing, non-destructive ultrasonic and radiographic inspections, mechanical property testing, and full chemical analysis. Third-party inspection and certification services (SGS, BV, TUV, etc.) are available to meet global standards and client-specific requirements.

In summary, API 5L GR.B Oil and Gas Line Pipe offers a strong, versatile, and reliable solution for energy infrastructure projects. Its proven performance, wide availability, and compliance with international pipeline standards make it a preferred choice for oil and gas transmission systems around the world.