How Would You Elaborate Certain Levels of API 5L X65 Line Pipe?


One of the versatile line pipes is line pipe just because of its unique features and it is considered the most trustworthy solution for the transport of oil and fuels. Because of its strong nature, weld ability as well its resistance to corrosion makes it a perfect choice for multiple applications.

The wall thicknesses can range relying on the specific necessities of the utility. API 5L is a specification issued by the American Petroleum Institute that unit standards for seamless and welded metal pipes appropriate for conveying fuel, water, and oil within the natural gas and oil industries. “X65” is the grade of the line pipe, indicating its minimal yield strength of 65,000 psi.

Line pipe is to be had in numerous sizes, starting from 2 inches to forty-eight inches in diameter. Here we are going to discuss some levels of API 5L X65 Line Pipe and what is specifically working in their particular domain.

What is the Reason for Choosing TUSPIPE?

Excellent craftsmanship line pipes have been the focus of United Steel Pipe Company of Tianjin (TUSPIPE) since 1998. The organization encompasses a wide range of subjects and industries with a capacity for production of 500,000 plus tons annually, covering oil and the exploitation of gas and gearbox, ship and car construction, water and power, conservation of the environment, structural engineering, mechanical engineering development, and others.

High-quality goods and thorough regulation of product quality are objectives for TUSPIPE. Since 2004, the business has operated testing and inspection Centre to ensure high product quality. The test and inspection center may perform impact testing, DWTT, tensile tests, hydro tests, etc. thanks to a variety of cutting-edge assessment and evaluation tools.

Various Levels of API 5L X65 Line Pipe

API 5L X65 PSL-1

The widely used carbon steel material pipe can be used in a wide range of industries and tree types (no corrosion circumstances, but pipes with high pressure require specific mechanical properties). It consequently contains far more C, MN, Si, P, and S than the other two kinds. (Steel is purer when the amount of these chemical components is lower.) The weakest tensile strength is 535 Mpa (65300 psi), while the lowest possible yield strength is 65300 psi at 450 Mpa.).

API 5L X65 PSL-2

The concentrations for C, Si, Mn, P, and S are lower in PSL-2 than in PSL-1 (also known as API 5L L450Q or X65Q.M). PSL-1 is below the levels of C, Si, Mn, P, and S. Since CEpcm must be less than 0.25 and CEq must be less than 0.43 for PSL-2. (Ceq, which stands for carbon equivalent, has an impact on the steel’s capacity for welding & Tensile Power).

API 5L X65 Sour Service

Pipes for sour services (X65QS/MS, L415QS/MS) has a maximum C value of 0.10, a maximum Mn value of 1.45, a highest Si value of 0.45, a maximum P value of 0.020, a maximum S value of 0.002, a maximum V value of 0.10, a maximum Nb value of 0.08, a maximum Ti value of 0.06 and a maximum CEP cm value of 0.

The chemical makeup of the sour service line pipe needs to be strictly within control. A low carbon footprint CEP cm values will consequently minimize marten site which is vulnerable to the H bubble, decreasing the pipe’s exposure to acidic environments like H2S and enhancing H2S corrosive resistance.

Sum Up

An oil and gas transportation supply pipeline utilizes API 5L Line Pipe, X65. The line pipe is constructed of steel grade. The petroleum, oil, and gas industries mostly use the pipeline. Despite this, the pipeline has an exceptionally high resistance against crack propagation attributable to the material. The API 5L Line Pipe, X65 also has excellent welding features.


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