API 5L Specification

The API 5L product comes in a variety of dimensions, with production procedures adhering to the highest industry standards. The steel grades used in its manufacture are top-notch, ensuring durability and longevity. The surface coatings are designed to withstand harsh conditions, while the end types and joint methods are tailored to facilitate easy installation. Our machining services are also available to customize the product to your specific needs.

StandardAPI Spec 5L 46th 2018
Dimensions10.3mm ~ 2134mm
1/8″ ~ 84″
1.7 ~ DN400
Thickness1.7mm ~ 52mm
SCH5S, SCH10, SCH20, SCH30, SCH40, STD, XXS, SCH60, SCH100, SCH120, SCH140, SCH160
Unit Length3 ~ 18 mtrs
Steel GradeAPI 5L Gr. B
API 5L X42
API 5L X46
API 5L X52
API 5L X56
API 5L X60
API 5L X65
API 5L X70
API 5L X80
Surface CoatingBlack Lacquer,Varnishing, Oiling, Hot Dip Galvanizing
FBE, 2PP, 3PP, 2PE, 3PE
End Type                                                         Plain, Bevelled, Threaded, Grooved, Shouldered
Joint MethodFitting, Flange, Coupling, Clamp, Pipe Shoulder, Welding
Pipe MachiningWelding, Bending, Hole Drilling, Punching, Swaging, Tapering, Flaring, Expanding

API 5L Dimension Table

API 5L Dimension Table

Our API 5L product comes in a wide range of sizes, catering to various pipeline requirements. The dimension table provides a comprehensive overview of the product’s size range, including diameter, wall thickness, and weight per unit length.

Chemical Requirements of API 5L

The chemical composition of API 5L ensures its ability to withstand harsh conditions. The product is designed with a balance of elements that enhance its strength, durability, and resistance to corrosion.

ElementsGrade AGrade BGrade C
Carbon max. %
Manganese %0.27 to 0.930.29 to 1.060.29 to 1.06
Phosphorous, max. %0.0250.0250.025
Sulfur, max. %0.0250.0250.025
Silicon, min. %

 Mechanical Requirements of API 5L

API 5L’s mechanical properties, including its yield strength, tensile strength, and hardness, are meticulously tested to ensure it can withstand the pressures of pipeline transportation.

Grade AGrade BGrade C
Tensile Strength, min., psi48,00060,00070,000
Yield Strength, min., psi30,00035,00040,000

Steel Grades in API 5L

API 5L is a robust product designed to meet the rigorous demands of the oil and gas industry. API 5L covers a variety of steel grades. The materials used for these pipes include grades such as B, X42, X46, X52, X56, X60, X65, X70, and X80, which are suitable for use in onshore, offshore, and sour services.

Steel Grades in API 5L

API 5L Product Specification Level (PSL)

API 5L specification includes two product specification levels (PSLs). These are PSL1 and PSL2.


PSL-1 is a standard quality for line pipe. PSL-1 pipes are available in Grades A25 through X70.


PSL-2 is a higher standard than PSL-1. PSL-2 pipes are available in Grade B through X80.