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API 5L Line Pipe

API 5L is for use in conveying gas, water, and oil in the natural gas and oil industries, and covers seamless and welded steel line pipe.

API 5L specifies the manufacture of two product levels (PSL1 and PSL2) of seamless and welded steel pipe for the use of a pipeline in the transportation of petroleum and natural gas.

API 5L Grade B pipe is a common grade pipe for oil and gas pipeline transmissions. It also called L245 Pipe refer ISO 3183, named by minimum yield strength 245 Mpa (355,000 Psi). Equivalent material ASTM A106 B or ASTM A53 B, which have similar value on chemical composition, mechanical properties, and applications. 


Product Details

API 5L Grade B Pipe Specification

Grade: API 5L Grade B Pipe
Manufacturing type: Seamless, ERW
Outer Diameters: 1/2” – 60”
Thickness: SCH 20, SCH 40, SCH STD, SCH 80 to SCH 160
Range of Length: SRL, DRL, 20FT, 40FT, 5 – 12 meter
Product Specification Level: PSL1, PSL2, Sour Services
Ends: Plain, Beveled
Coatings: FBE, 3PE/3LPE, Black Painting, Varnished



Most Common Use Material

API 5L Grade B, ASTM A106 Grade B and A53 B, these three are most common use material for the industries where refers pipeline construction or oil and gas, liquid transmissions.

ASTM 106 pipe refers to the carbon steel pipe manufactured in hot rolled or cold drawn (rolled) seamless.

ASTM A53 pipe covers welded and seamless steel pipe, in carbon black material and some cases in hot dipped galvanized (zinc coated).



PSL1, PSL2 and Sour Service Type

PSL1 is generally use which equivalent to ASTM A106 B and A53 B.

PSL2 is a higher specificaiton level pipe, has more strict value on chemical and mechanical strenth. More over PSL2 requires more test methods like None Distructive Test, CVN Impact Test, DWT etc.
API 5L B PSL2 expressed with API 5L BN/Q/R/M

Sour Services: For sour pipelines like H2S environment, pipe material have typical resrictions on chemicals element of Carbon, P and S. Referring standard NACE MR0175.

API 5L B Pipe for Sour Service expressed in API 5L BNS/QS/MS



API 5L Seamless Steel Pipe Chemical Composition & Grades

API 5L Grades API 5L Chemical Composition
C Si Mn P S V Nb Ti
API 5L X42 0.16 0.45 1.65 0.02 0.01 0.07 0.05 0.04
API 5L X52 0.16 0.45 1.65 0.02 0.01 0.07 0.05 0.04
API 5L X60 0.16 0.45 1.65 0.02 0.01 0.08 0.05 0.04
API 5L X65 0.16 0.45 1.65 0.02 0.01 0.09 0.05 0.06
API 5L X70 0.17 0.45 1.75 0.02 0.01 0.1 0.05 0.06



API 5L Seamless Steel Pipe Yield & Tensile Strength:

API 5L Grades Grade Yield Strength Tensile Strength  Yield to Tensile  Elongation
min. (KSI) min. (KSI) Ratio (max) %
API 5L X42 42 60 0.93 23
API 5L X52 52 66 0.93 21
API 5L X60 60 75 0.93 23
API 5L X65 65 77 0.93 18
API 5L X70 70 82 0.93 17




NPS O.D ANSI B36.10   B36.19  Wall Thickness
DN(mm) inch mm Sch5S Sch10S Sch10 Sch20 Sch30 Sch40S STD Sch40 Sch60 Sch80 XS Sch80S Sch100 XXS
8 1/4 13.72 - 1.65 - - - 1.73 1.73 1.73 - 3.02 3.02 3.02 - -
10 3/8 17.14 - 1.65 - - - 2.31 2.31 2.31 - 3.2 3.2 3.2 - -
15 1/2 21.34 1.65 2.11 - - - 2.77 2.77 2.77 - 3.73 3.73 3.73 - 7.47
20 3/4 26.67 1.65 2.11 - - - 2.87 2.87 2.87 - 3.91 3.91 3.91 - 7.82
25 1 33.4 1.65 2.77 - - - 3.38 3.38 3.38 - 4.55 4.55 4.55 - 9.09
32 1 1/4 42.16 1.65 2.77 - - - 3.56 3.56 3.56 - 4.85 4.85 4.85 - 9.7
40 1 1/2 48.26 1.65 2.77 - - - 3.68 3.68 3.68 - 5.08 5.08 5.08 - 10.16
50 2 60.32 1.65 2.77 - - - 3.91 3.91 3.91 - 5.54 5.54 5.54 - 11.07
65 2 1/2 73.02 2.11 3.05 - - - 5.16 5.16 5.16 - 7.01 7.01 7.01 - 14.02
80 3 88.9 2.11 3.05 - - - 5.49 5.49 5.49 - 7.62 7.62 7.62 - 15.24
90 31/2 101.6 2.11 3.05 - - - 5.74 5.74 5.74 - 8.08 8.08 8.08 - -
100 4 114.3 2.11 3.05 - - - 6.02 6.02 6.02 - 8.56 8.56 8.56 - 17.12
125 5 141.3 2.77 3.4 - - - 6.55 6.55 6.55 - 9.53 9.53 9.53 - 19.05
150 6 168.28 2.77 3.4 - - - 7.11 7.11 7.11 - 10.97 10.97 10.97 - 21.94
200 8 219.08 2.77 3.4 - 6.35 7.04 8.18 8.18 8.18 10.31 12.7 12.7 12.7 15.09 22.22
250 10 273.05 3.4 3.76 - 6.35 7.8 9.27 9.27 9.27 12.7 12.7 12.7 15.09 18.26 25.4
300 12 323.85 3.96 4.57 - 6.35 8.38 9.52 9.52 10.3 14.27 12.7 12.7 17.48 21.44 -
350 14 355.6 3.96 4.78 6.35 7.92 9.52 *9.52 9.52 11.13 15.09 12.7 12.7 19.05 23.83 -
400 16 406.4 4.19 4.78 6.35 7.92 9.52 *9.52 9.52 12.7 16.66 12.7 12.7 21.44 26.19 -
450 18 457.2 4.19 4.78 6.35 7.92 11.12 *9.52 9.52 14.27 19.05 12.7 12.7 23.82 29.36 -
500 20 508 4.78 5.54 6.35 7.92 12.7 *9.52 9.52 15.09 20.62 12.7 12.7 26.19 32.54 -
550 22 558.8 4.78 5.54 6.35 7.92 12.7 *9.52 9.52 - 22.22 12.7 12.7 28.58 34.92 -
600 24 609.6 5.54 6.35 6.35 7.92 14.27 *9.52 9.52 17.48 24.61 12.7 12.7 30.96 38.89 -
650 26 660.4 - *7.92 7.92 12.7 - *9.52 9.52 - - 12.7 12.7 - - -
700 28 711.2 - *7.92 7.92 12.7 15.88 *9.52 9.52 - - 12.7 12.7 - - -
750 30 762 6.35 *7.92 7.92 12.7 15.88 *9.52 9.52 - - 12.7 12.7 - - -
800 32 812 - *7.92 7.92 12.7 15.88 *9.52 9.52 17.48 - 12.7 12.7 - - -
850 34 863.6 - *7.92 7.92 12.7 15.88 *9.52 9.52 17.48 - 12.7 12.7 - - -
900 36 914.4 - *7.92 7.92 12.7 15.88 *9.52 9.52 19.05 - 12.7 12.7 - - -
950 38 965.2 - *7.92 - - - *9.52 9.52 - - 12.7 12.7 - - -
1000 40 1016 - *7.92 - - - *9.52 9.52 - - 12.7 12.7 - - -
1050 42 1066.8 - *7.92 - - - *9.52 9.52 - - 12.7 12.7 - - -
1100 44 1117.6 - *7.92 - - - *9.52 9.52 - - 12.7 12.7 - - -
1150 46 1168.4 - *7.92 - - - *9.52 9.52 - - 12.7 12.7 - - -
1200 48 1219.2 - *7.92 - - - *9.52 9.52 - - 12.7 12.7 - - -
1300 52 1320.8 - - - - - - 9.52 - - - 12.7 - - -
1350 54 1371.6 - - - - - - 9.52 - - - 12.7 - - -
1400 56 1422.4 - - - - - - 9.52 - - - 12.7 - - -
1500 60 1524 - - - - - - 9.52 - - - 12.7 - -
1600 64 1625.6 - - - - - - 9.52 - - - 12.7 - -
1700 68 1727.2 - - - - - - 9.52 - - - 12.7 - -
1800 72 1828.8 - - - - - - 9.52 - - - 12.7 - -
1900 76 1930.4 - - - - - - 9.52 - - - 12.7 - -
2000 80 2032 - - - - - - 9.52 - - - 12.7 - -








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