API 5L is the standard specification for seamless and welded steel pipe used in transportation systems for the oil and gas industry. The specification covers different grades of steel pipe for the transportation of gas, water and oil in the oil and gas industry.
API 5L is the standard specification for seamless and welded steel pipe used in transportation systems for the oil and gas industry. The specification covers different grades of steel pipe for the transportation of gas, water and oil in the oil and gas industry.
Seamless API 5L pipe specifications include several different steel grades, including Grade B, X42, X46, X52, X56, X60, X65, X70, X80, and L245 through L555. Each grade has its own specific properties, such as yield strength, tensile strength, and impact resistance, which make it suitable for different applications.
| Standard | Out Diameter | Wall Thickness | |
| API 5L | Tolerance | Tolerance | |
| D<60.3 | +0.41mm, -0.80mm | +15.0%, -12.5% | |
| D≥60.3 | +0.75%D, -0.75%D | +15.0%, -12.5% | |
