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Specification for API 5L Back Next

Specification for line pipe API SPEC 5L (-09): specifies the requirements for the manufacture of two product specification levels (PSL1 and PSL2) of seamless and welded steel pipes for use in pipeline transportation systems in the petroleum and natural gas industries.

Pipe grades, Steel grades and acceptable delivery conditions:
PSL Delivery conditions Steel grade
PSL 1 As rolled, normalizing rolled, thermomechanical rolled / formed, normalizing formed, normalized and tempered; if agreed, quenched and tempered for SMLS pipe only L245 / B
As rolled, normalizing rolled, thermomechanical rolled / formed, normalizing formed, normalized and tempered or quenched and tempered L290 / X42
L320 / X46
L360 / X52
L390 / X56
L415 / X60
L450 / X65
L485 / X70
PSL 2 As rolled L245R / BR
Normalizing rolled / formed, normalized, normalized and tempered L245N / BN
Quenched and tempered L245Q / BQ
 
Chemical composition for PSL1 pipe with T≤25.0mm
Steel grade C max Mn max P S max V max Nb max Ti max
Seamless pipe
L245 / B 0.28 1.20 0.030 c,d c,d d
L290 / X42 0.28 1.30 0.030 d d d
L320 / X46 0.28 1.40 0.030 d d d
L360 / X52 0.28 1.40 0.030 d d d
L390 / X56 0.28 1.40 0.030 d d d
L415 / X60 0.28 1.40 0.030 f f f
L450 / X65 0.28 1.40 0.030 f f f
L485 / X70 0.28 1.40 0.030 f f f
c Nb+V≤0.06%, d Nb+V+Ti≤0.15%, f Unless otherwise agreed, Nb+V+Ti≤0.15%
 
Requirements for the results of tensile tests for PSL1 pipe
Pipe grade Pipe body of seamless and welded pipes
Yield strength Tensile strength Elongation
MPa (psi) min MPa (psi) min % min
L245 / B 245(35 500) 415(60 200) c
L290 / X42 290(42 100) 415(60 200) c
L320 / X46 320(46 400) 435(63 100) c
L360 / X52 360(52 200) 460(66 700) c
L390 / X56 390(56 600) 490(71 100) c
L415 / X60 415(60 200) 520(75 400) c
L450 / X65 450(65 300) 535(77 600) c
L485 / X70 485(70 300) 570(82 700) c
c The specified minimum elongation, Af1 shall be as determined using the equation as described in Specification

Note: further information shall be available upon request

 

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