Line Pipe & Products
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Line Pipe & Products

Line pipe is a specialized steel pipe used for oil, gas and fluid transmission, manufactured in line with API 5L and international standards, featuring high strength, good toughness and excellent corrosion resistance for long-distance pipeline projects.
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Line Pipe

Standards

APISPEC 5L, ISO 3180, GOST 8732-78

GB/T9711.1, GB/T9711.2, GB/T9711.03

NACE-M R 0175M ESC SPEC 74.001

Other Company Standards: Total, Shell, ADCO, NIDC and Chevron etc


Chemistry
Standard Level Grade C Si Mn P S V Nb Ti Others CEhw CEpcm
API SPEC 5L Seamless Pipe PSL1 L245 B 0.28 1.2 0.03 0.03
L290 X42 0.28 1.3 0.03 0.03
L32 X46 0.28 1.4 0.03 0.03
L360 X52 0.28 1.4 0.03 0.03
L390 X56 0.28 1.4 0.03 0.03
L415 X60 0.28 1.4 0.03 0.03
L450 X65 0.28 1.4 0.03 0.03
L485 X70 0.28 1.4 0.03 0.03
Seamless Pipe PSL2 L245N BN 0.24 0.40 1.2 0.025 0.015 0.04 0.43 0.25
L290N X42N 0.24 0.40 1.2 0.025 0.015 0.06 0.05 0.04 0.43 0.25
L320N X46N 0.24 0.40 1.2 0.025 0.015 0.07 0.05 0.04 0.46 0.25
L360N X52N 0.24 0.40 1.2 0.025 0.015 0.1 0.05 0.04 0.43 0.25
L390N X56N 0.24 0.40 1.2 0.025 0.015 0.1 0.05 0.04 0.43 0.25
L415N X60N 0.24 0.40 1.2 0.025 0.015 0.1 0.05 0.04
L450Q X65Q 0.18 0.45 1.7 0.025 0.015 0.43 0.25
L485Q X70Q 0.18 0.45 1.8 0.025 0.015 0.43 0.25
Seamless Pipe Sour Service PSL2 L245NS BNS 0.14 0.40 1.35 0.02 0.003 0.04 0.36 0.19
L290NS X42NS 0.14 0.40 1.35 0.02 0.003 0.05 0.05 0.04 0.36 0.19
L320NS X46NS 0.14 0.40 1.4 0.02 0.003 0.07 0.05 0.04 0.38 0.2
L360NS X52NS 0.16 0.45 1.65 0.02 0.003 0.1 0.05 0.04 0.43 0.22
L245QS BQS 0.14 0.40 1.35 0.02 0.003 0.04 0.04 0.04 0.34 0.19
L290QS X42QS 0.14 0.40 1.35 0.02 0.003 0.04 0.04 0.04 0.34 0.19
L320QS X46QS 0.15 0.45 0.4 0.02 0.003 0.05 0.05 0.04 0.36 0.2
L360QS X52QS 0.16 0.45 1.65 0.02 0.003 0.07 0.05 0.04 0.39 0.2
L390QS X56QS 0.16 0.45 1.65 0.02 0.003 0.07 0.05 0.04 0.4 0.21
L415QS X60QS 0.16 0.45 1.65 0.02 0.003 0.08 0.05 0.04 0.41 0.22
L450QS X65QS 0.16 0.45 1.65 0.02 0.003 0.09 0.05 0.06 0.42 0.22
L485QS X70QS 0.16 0.45 1.65 0.02 0.003 0.09 0.05 0.06 0.42 0.22


Mechanical Properties
Standard Level Grade Yield Strength Rt 0.5 Tensile Strength Rm Yield Ratio Hardness
Minimum Maximum Minimum Maximum Rt0.5/Rm Max
(psi) (MPa) (psi) (MPa) (psi) (MPa) (psi) (MPa)
API SPEC 5L Seamless Pipe PSL1 L245 B 35500 245 - - 60200 415 - - - -
L290 X42 42100 290 - - 60200 415 - - - -
L320 X46 46400 320 - - 63100 435 - - - -
L360 X52 52200 360 - - 66700 460 - - - -
L390 X56 56600 390 - - 71100 490 - - - -
L415 X60 60200 415 - - 75400 520 - - - -
L450 X65 65300 450 - - 77600 535 - - - -
L485 X70 70300 485 - - 82700 570 - - - -
Seamless Pipe PSL2 L245N BN 35500 245 65300 450 60200 415 110200 760 0.93 -
L245Q BQ 35500 245 65300 450 60200 415 110200 760 0.93 -
L290N X42N 42100 290 71800 495 60200 415 110200 760 0.93 -
L290Q X42Q 42100 290 71800 495 60200 415 110200 760 0.93 -
L320N X46N 46400 320 76100 525 63100 435 110200 760 0.93 -
L320Q X46Q 46400 320 76100 525 63100 435 110200 760 0.93 -
L360N X52N 52200 360 76900 530 66700 460 110200 760 0.93 -
L360Q X52Q 52200 360 76900 530 66700 460 110200 760 0.93 -
L390N X56N 56600 390 79000 545 71100 490 110200 760 0.93 -
L390Q X56Q 56600 390 79000 545 71100 490 110200 760 0.93 -
L415N X60N 60200 415 81900 565 75400 520 110200 760 0.93 -
L415Q X60Q 60200 415 81900 565 75400 520 110200 760 0.93 -
L450Q X65Q 65300 450 87000 600 77600 535 110200 760 0.93 -
L485Q X70Q 70300 485 92100 635 82700 570 110200 760 0.93 -
Seamless Pipe Sour Service PSL2 L245NS BNS 35500 245 65300 450 60200 415 110200 760 0.93 ≤250HV10 or ≤22HRC
L245QS BQS
L290NS X42NS 42100 290 71800 495 60200 415 110200 760 0.93
L290QS X42QS
L320NS X46NS 46400 320 76100 525 63100 435 110200 760 0.93
L320QS X46QS
L360NS X52NS 52200 360 76900 530 66700 460 110200 760 0.93
L360QS X52QS
L390QS X56QS 56600 390 79000 545 71100 490 110200 760 0.93
L415QS X60QS 60200 415 81900 565 75400 520 110200 760 0.93
L450QS X65QS 65300 450 87000 600 77600 535 110200 760 0.93
L485QS X70QS 70300 485 92100 635 82700 570 110200 760 0.93


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