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Line pipe mainly used for transportation of gas, water oil. Sour service pipeline is intended for solving the problem of cracking and leakage caused by insufficient resistance to sulfide stress corrosion cracking and hydrogen induced cracking under acidic service environment when developing in acid oil and gas exploration.

 

Standards and technical terms of products

API SPEC 5L  Specification for line pipe

ISO 3183  Petroleum and natural gas industries-steel pipe for pipeline transportation system.

GB/T9711  Pipe line used for transport system in oil and gas industry

ASME B36.10 Welded and seamless wrought steel pipe

ANSI/NACE MR0175 Metals for sulfide stress cracking and stress corrosion cracking resistance in sour oilfield

ANSI/NACE TM0177 Laboratory testing of metal for resistance to sulfide stress cracking and stress Corrosion cracking  in H2S environment

ISO15156  Petroleum and natural gas industries -materials for use in H2S containing environment in oil and gas production

 

Size

 

OD:21.3mm-610mm

Wall Thickness:2.77mm-59.54mm

DN(mm)NPS(in)OD(mm)102030STD/4060XS/80100120140160XXS
151/221.32.773.734.787.47
203/426.72.873.915.567.82
25133.43.384.556.359.09
321 1/442.23.584.856.359.70
401 1/248.33.685.087.141.015
50260.33.915.548.7411.07
652 1/273.05.167.019.5314.02
80388.95.497.6211.1315.24
903 1/2101.65.748.08
1004114.36.028.5611.1313.4917.12
1255141.36.559.5312.7015.8819.05
1506168.37.1110.9714.2718.2621.95
2008219.16.357.048.1810.3112.7015.0818.2620.6223.0122.23

 

Chemical composition

GradeChemical composition/% Max
CSiMnPSVNbTi
L245/B0.281.200.0300.030
L290/X420.281.300.0300.030
L320/X460.281.400.0300.030
L360/X520.281.400.0300.030
L390/X560.281.400.0300.030
L415/X600.281.400.0300.030
L450/X650.281.400.0300.030
L485/X700.281.400.0300.030
Note: Date in the composition of PSL1:PSL2 The composition can be negotiated by both parties

 

 

Mechanical property requirements

GradeYield strength/MpaYield strength/MpaYield ratioCVN/J
PSL1(Min)PSL2PSL1(Min)PSL2PSL1(Min)PSL2
-N,Q-NS,QS-N,Q-NS,QS-N,Q-NS,QS
L245/B245245~450245~450415415~655415~655 ≤0.93 ≤0.93≥27
L290/X422900290~495290~495415415~655415~655
L320/X46320320~525320~525435435~655435~655
L360/X52360360~530360~530460460~760460~760
L390/X56390390~545390~545490490~760490~760
L415/X60415415~565415~565520520~760520~760
L450/X65450450~600450~600535535~760535~760
L485/X70485485~635485~635570570~760570~760
L555/X80555~705625~825≥40
Note:Line pipe for other special service environment will be manufactured based on the negotiation resule of both sides.

API 5L LINE PIPE

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