API 5L X60 PSL2 specification: seamless and welded

API 5L X60 PSL2 specification covers both seamless and welded steel pipe for use in the transportation of oil, gas, and water. Here are some key aspects of the specification:

1. Seamless Pipes: API 5L X60 PSL2 allows the manufacturing of seamless pipes which are produced without any welding process. These pipes are formed by piercing a solid billet to create a hollow tube. Seamless pipes are known for their uniformity, strength, and ability to withstand high-pressure environments.

2. Welded Pipes: The specification also includes the manufacturing of welded pipes. Welded pipes are made by joining two or more pieces of steel together through various welding processes such as electric resistance welding (ERW), submerged arc welding (SAW), or longitudinal seam welding. Welded pipes are generally cost-effective and suitable for less critical applications.

3. Mechanical Properties: API 5L X60 PSL2 specifies minimum yield strength, tensile strength, and impact properties for both seamless and welded pipes. These properties ensure the integrity and reliability of the pipes under different operating conditions.

4. Non-Destructive Testing: The specification requires non-destructive testing methods such as ultrasonic inspection, magnetic particle inspection, and radiographic examination to detect any defects or imperfections in the pipes, ensuring their quality and safety.

Both seamless and welded API 5L X60 PSL2 pipes offer excellent performance and are used extensively in the oil and gas industry for pipeline transportation. The choice between seamless and welded pipes depends on factors such as project requirements, cost considerations, and the specific application's operating conditions.