PSL is the abbreviation of product specification level. PSL1 for common quality leves where PSL2 is more strictly on chemical composition CEQ , mechanical properties, nondestructive testing requirement and other test requirements and values. For PSL2 pipe. API 5L pipe shall be performed a hydrostatic test without leakage through the weld seam or the pipe body. Jointers between the pipes no need to do the hydrostatic test where the sections used were successfully tested. Cracks should not occur in any point of the test sample and opening of weld shall not occur as well.
What Chemicals are Used in Fracking? Is that True? Does Hydraulic Fracturing Cause Earthquakes? What are Fracking Myths? Energy Tomorrow Blog. Key Changes Updated and expanded requirements for mill jointers differentiate between double-jointers and mill jointers; avoid welding consumables environmental contamination; require qualification standards; new process testing requirements; clarify offset and undercut requirements; standardize marking requirements; reference weld repair annex ; Updated requirements for pipe end squareness; Updated requirements for hardness testing on PSL 2 pipe for sour service and PSL 2 pipe for offshore service; New annex for strain-based design requirements PSL 2 pipe for applications requiring longitudinal plastic strain capacity Effective Date and Program Implications The Monogram Program effective date will be November 1, Additional Information and Questions The companion video, highlighting key changes and the implications for API Monogram licensees, is now available.
Certification Directories Free directories listing all of the participants in our certification-related programs. In a word, API 5L pipe is the carbon steel pipe applied to the oil and gas transmission system.
Meanwhile other fluids like steam, water, slurry also could adopt the API 5L standard for the transmission purposes. Seamless manufacturing type usually for the small diameters pipe, normally diameter under 24 inch. For the pipe diameter is less than mm or 6 inch, the seamless steel pipe is more applied than steel pipe in welded. There are also big diameters seamless pipe. By hot rolled manufacturing process we could get seamless pipe diameters at most 20 inch mm. As the development of pipeline steel plate making technology, pipe forming and welding technology also has been much improved, so a lot of ERW pipe and SAW pipe used in the pipeline constructions.
Specially for the big diameter steel pipe, SAW pipe gains a great advantage. With less raw material cost, simplified and uniform production procedures, welded steel pipe has taken the first place in oil and gas line pipe industries. API 5L steel line pipe adopts different steel grades, generally are Gr. Some manufacturers are capable of manufacturing steel grade up to X and X As the steel line pipe grades higher, more strictly control on the carbon equivalent control, and higher mechanical strength performances.
More over, for the same grade API 5L pipe, seamless and welded chemical elements content is different, which welded pipe is required more strictly and lower on Carbon and Sulfur. By different delivery condition, there are also As-rolled, normalizing rolled, thermomechanical rolled, normalizing formed, normalized, normalized and tempered, quenched and tempered.
The letter L followed by the specified minimum yield strength in Mpa. For example, L X42 means the minimum yield strength is Mpa.
The letter X followed by a two or three digital number equal to the minimum yield strength in psi rounded down to the nearest integer and, for PSL2 pipe, the letter describing the delivery condition R, N, Q, or M consist with the above formats. PSL is the abbreviation of product specification level. PSL1 and PSL2 are not only different for testing requirements, but also for chemical composition and mechanical properties. PSL1 is more strict than PSL2 in chemical composition, tensile properties, impact test, nondestructive testing and other indicators.
NDT: Non-destructive inspection and testing. It is to use radiographic, ultrasonic or other methods not to breaking the material in API 5L standard, to reveal pipe defects, imperfections. For each reduce of 0. For intermediate grades, the difference between the specified minimum tensile strength and minimum yield strength for the pipe body shall be as given in the table for the next higher grade.
The specified minimum tensile strength for the weld seam shall be the same value as was determined for the pipe body ung footnote a.
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