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API 5L Steel Pipe
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API 5L Steel Pipe
  • API 5L Steel Pipe
  • API 5L Steel Pipe
  • API 5L Steel Pipe
  • API 5L Steel Pipe

API 5L Steel Pipe

Main Usage:The API SPEC 5L specification provides standards for pipe suitable for use in conveying gas, water, and oil in the natural gas and oil industries. The API SPEC 5L covers seamless and welded steel line pipe. It includes plain-end, threaded-end, and belled-end pipe, as well as through-the-flowline (TFL) pipe, and pipe with ends prepared for use with special couplings....

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Fluid Transportation Steel Pipe
Grade: PSL1    PSL2
Main material: Q195-235   20#16Mn Q345(B,C) L175-L555(X42-X80), J55, K55, N80
API 5L x52: Min Yield Strength - 52 ksi, Min Elongation: 21%0.16% C, 0.45% Si, 1.65% Mn, 0.02% P, 0.01% S, 0.07% V, 0.05% Nb, 0.04% Ti


Main Usage:The API 5L specification provides standards for pipe suitable for use in conveying gas, water, and oil in the natural gas and oil industries. The API SPEC 5L covers seamless and welded steel line pipe. It includes plain-end, threaded-end, and belled-end pipe, as well as through-the-flowline (TFL) pipe, and pipe with ends prepared for use with special couplings. 

Standard Specification for Line Pipe:Specifications for API 5L adhere to the International Organization for Standardization ISO 3183, standardizing pipeline transportation systems within the materials, equipment and offshore structures for natural gas, petroleum, and petrochemical industries.  When authoring the standards, the technical committee recognized that there are two basic Product Specifications Levels (PSL) of technical requirements and therefore developed PSL 1 and PSL 2.  PSL 1 is a standard quality for line pipe where PSL 2 contains additional chemical, mechanical properties, and testing requirements. 
Grades covered by this specification are A25, A, B and "X" Grades X42, X46, X52, X56, X60, X65, X70, and X80.  The two digit number following the "X" indicates the Minimum Yield Strength (in 000's psi) of pipe produced to this grade.


API 5L Steel Pipe Benefits & Applications:

Fluid transportation steel pipe- preferred in long pipelines due to inexpensiveness
Pipeline steel - resistance to crack propogation
Line Pipe / Sour Service Line Pipes


PSL1 Vs PSL2 Pipes

PARAMETER PSL1 PSL2
Grade Range A25 through X70 B through X80
Size range 0.405″ through 80″ 4.5″ through 80″
Type of ends Plain end, Threaded end, Plain end
Bevelled end special coupling pipes
Seam welding All methods: All methods:
continuous welding except continuous welding
limited to A25 and laser welding
Electric welds: welder frequency No minimum kHz minimum 100
Heat treatment of electric welds Required for grades >X42 Required for all grades
(B through X80)
Chemistry: Max C for Seamless pipe 0.28% for grades ≥ B 0.24%
Chemistry: Max C for Welded pipe 0.26% for grades ≥ B 0.22%
Chemistry: Max P 0.030% for grades ≥ A 0.03%
Chemistry: Max S 0.03% 0.02%
Carbon equivalent: Only when purchaser Maximum required
specifies SR18 for each grade
Yield strength, maximum None Maximum for each grade
UTS (Ultimate Tensile Strength) None Maximum for each grade
maximum
Fracture toughness None required Required for all grades
Non-destructive inspection Only when purchaser SR4 mandatory
of Seamless specifies SR4
Repair by welding of pipe body Permitted Prohibited
plate,and skelp
Repair by welding of weld seams Permitted by agreement Prohibited
without filler metal
Certification Traceable only until Certificates (SR15.1)
all tests are passed mandatory
Traceability Traceable only until Traceable after completion
all tests are passed of tests
unless SR15 is specified (SR15.2) mandatory