API 5L GR.B Carbon Seamless Pipe for Oil and Gas

API 5L Grade B Carbon Seamless Pipe is a high-performance steel pipe widely used in the oil and gas industry for the transmission of crude oil, natural gas, petroleum products, and water. Manufactured according to the American Petroleum Institute’s API 5L standard, Grade B pipes are engineered for strength, durability, and reliability under high-pressure and high-temperature conditions.

The seamless manufacturing process provides a uniform wall thickness and eliminates the presence of weld seams, which can be weak points in high-stress systems. This makes seamless Grade B pipe a preferred choice for demanding applications in onshore and offshore oil fields, refineries, and gas pipelines.

The pipe’s chemical composition is primarily carbon and manganese, with controlled levels of sulfur, phosphorus, and silicon, resulting in a material that offers excellent weldability, formability, and mechanical strength. API 5L GR.B pipes meet the requirements for both PSL1 and PSL2 product specification levels, with PSL2 offering enhanced mechanical properties and stricter testing protocols.

Key mechanical properties:

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

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

High ductility and toughness for harsh field conditions

Good resistance to internal pressure and corrosion (when coated)

Typical applications include:

Crude oil and gas transmission pipelines

Petroleum product distribution networks

Well casing and tubing in drilling operations

Onshore and offshore pipeline infrastructure

Gas gathering and water injection lines

API 5L GR.B seamless pipes are available in a wide range of sizes, from 1/2 inch to 48 inches, with various wall thickness options (SCH40, SCH80, XS, XXS, etc.). Pipes are delivered with plain, beveled, or threaded ends to meet the installation needs of different systems.

All pipes undergo rigorous quality testing, including hydrostatic testing, ultrasonic testing, radiographic inspection, chemical analysis, and mechanical property evaluation. Third-party inspection and certification (SGS, BV, TUV, etc.) can be provided upon request to meet international standards.

In summary, API 5L GR.B Carbon Seamless Pipe is a dependable and cost-effective solution for oil and gas transport pipelines. Its seamless structure, robust mechanical performance, and compliance with global standards make it a trusted material for critical infrastructure across the energy sector.