API 5L Pipe is a high-strength carbon steel pipe specification for the transportation of oil, gas, water, and other fluids. These pipes are widely used in onshore and offshore pipeline systems due to their excellent mechanical properties, durability, and resistance to pressure and harsh environmental conditions.
API 5L pipes are manufactured in both seamless and welded forms, including ERW, EFW, and SAW, and are supplied in PSL1 and PSL2 levels to meet various service requirements. Seamless pipes are preferred for high-pressure applications, while welded pipes are commonly used in long-distance and large-diameter pipeline systems.
API 5L pipes are available in multiple grades to suit different pressure and strength requirements. The commonly supplied API 5L grades include API 5L Grade B,API 5L X42 ,API 5L X52 ,API 5L X56 , API 5L X60 ,API 5L X65 ,API 5L X70 , and API 5L X80 .
API 5L Grade B pipes are suitable for low to medium pressure applications and offer good weldability. API 5L X42 and X52 provide improved strength and durability for moderate pressure pipeline systems. API 5L X56 and X60 are medium to high-strength grades commonly used in oil and gas transmission lines.
API 5L X65 and X70 pipes are widely used in long-distance and high-pressure pipelines due to their superior mechanical properties, while API 5L X80 is an advanced high-strength grade designed for critical and high-capacity pipeline projects.
Revinox is a trusted supplier of API 5L pipes in both PSL1 and PSL2 specifications. These pipes are available in standard weight, extra strong, and customized end finishes to meet project-specific requirements. API 5L pipes offer a reliable, safe, and efficient solution for oil, gas, and water transportation projects worldwide.
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Application of API 5L Pipe
| ● Oil & Gas Transportation Pipelines |
| ● Petrochemical & Refinery Industry |
| ● Water Transmission & Supply Systems |
| ● Onshore & Offshore Pipeline Projects |
| ● Construction & Infrastructure |
Specification Table of API 5L Pipe
| Specification | Details | |
|---|---|---|
|
Standard
|
API 5L, ISO 3183 (PSL 1 & PSL 2) | |
|
Size
|
1/2″ to 24″, sizes above 24″ available on request | |
|
Schedule
|
SCH 10, SCH 40, SCH 80, SCH 160 up to SCH XXS | |
|
Type
|
Seamless, Welded, ERW, EFW, LSAW, SSAW | |
|
Grades
|
Gr B, X42, X52, X56, X60, X65, X70, X80 | |
Delivery Condition
| PSL | Delivery Condition | Pipe Grades |
|---|---|---|
| PSL 1 | As-rolled, normalized, normalizing formed | Grade A, Grade B |
| Thermomechanical rolled, normalized and tempered | X42, X52, X56, X60, X65, X70, X80 | |
| PSL 2 | Normalizing rolled / Normalized | BN, X42N, X52N, X56N, X60N, X70N, X80N |
| Quenched & Tempered | X52Q, X56Q, X60Q, X65Q, X70Q, X80Q | |
| Thermomechanical rolled / formed | X42M, X52M, X56M, X60M, X65M, X70M, X80M |
API 5L Pipe Grades (Sub-Products)
| ● API 5L Grade B – Low to medium pressure pipeline applications |
| ● API 5L X42 – Moderate strength pipelines |
| ● API 5L X52 – Oil & gas transmission pipelines |
| ● API 5L X56 – Medium to high pressure applications |
| ● API 5L X60 – High pressure pipeline systems |
| ● API 5L X65 – Long distance oil & gas pipelines |
| ● API 5L X70 – Large diameter & high strength pipelines |
| ● API 5L X80 – Critical and high-capacity pipeline projects |
Process of Manufacturing – API 5L Pipe
| Type of Pipe | PSL 1 | PSL 2 | |||
|---|---|---|---|---|---|
| Grade A / Gr B | X42 / X52 | X56 to X70 | B to X80 | X80 | |
| SMLS | ✔ | ✔ | ✔ | ✔ | ✔ |
| LFW | ✔ | ✔ | ✔ | ||
| HFW | ✔ | ✔ | ✔ | ✔ | |
| LW | ✔ | ||||
| SAWL | ✔ | ✔ | ✔ | ✔ | ✔ |
| SAWH | ✔ | ✔ | ✔ | ✔ | ✔ |
|
SMLS – Seamless Pipe LFW – Low Frequency Welded Pipe (<70 kHz) HFW – High Frequency Welded Pipe (>70 kHz) SAWL – Submerged Arc Welded (Longitudinal) SAWH – Submerged Arc Welded (Helical) |
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Chemical Composition Table – API 5L Pipe (PSL 1)
| Steel Grade | C max | Mn max | P max | S max | Nb + V + Ti max |
|---|---|---|---|---|---|
| API 5L Grade B | 0.28 | 1.20 | 0.030 | 0.030 | 0.15 |
| API 5L X42 / X52 | 0.28 | 1.40 | 0.030 | 0.030 | 0.15 |
| API 5L X56 – X70 | 0.28 | 1.40 | 0.030 | 0.030 | 0.15 |
Chemical Composition Table – API 5L Pipe (PSL 2)
| Pipe Grade | C max | Mn max | P max | S max | CE (Max) |
|---|---|---|---|---|---|
| X42 / X52 | 0.24 | 1.40 | 0.025 | 0.015 | 0.43 |
| X56 / X60 | 0.22 | 1.50 | 0.025 | 0.015 | 0.43 |
| X65 / X70 / X80 | 0.20 | 1.60 | 0.025 | 0.015 | 0.45 |
Mechanical Properties – API 5L Pipe
| Pipe Grade | Yield Strength (PSI Min) | Tensile Strength (PSI Min) | Elongation Min % |
|---|---|---|---|
| API 5L Grade B | 35,000 | 60,000 | 22 |
| API 5L X42 | 42,000 | 60,000 | 21 |
| API 5L X52 | 52,000 | 66,000 | 21 |
| API 5L X56 | 56,600 | 71,100 | 20 |
| API 5L X60 | 60,200 | 75,400 | 20 |
| API 5L X65 | 65,300 | 77,000 | 19 |
| API 5L X70 | 70,300 | 82,000 | 18 |
| API 5L X80 | 80,000 | 90,000 | 18 |
API 5L Pipe – Tensile and Yield Properties (PSL1 & PSL2)
API 5L pipes are widely used for the transportation of oil, gas, water, and other fluids in high-pressure applications. These pipes are manufactured in both PSL1 and PSL2 specifications, offering excellent tensile strength, yield strength, and durability for onshore and offshore pipeline systems.
API 5L Pipe Sub-Products Offered:
- API 5L Grade B Pipe
- API 5L X42 Pipe
- API 5L X52 Pipe
- API 5L X56 Pipe
- API 5L X60 Pipe
- API 5L X65 Pipe
- API 5L X70 Pipe
- API 5L X80 Pipe
| Pipe Grade | Tensile Properties – Pipe Body of SMLS and Welded Pipes (PSL 2) |
Seam of Welded Pipe Tensile Strength d Rm (psi) Min |
||||
|---|---|---|---|---|---|---|
| Yield Strength a (Rt0,5 PSI) |
Tensile Strength a (Rm PSI) |
Ratio a,c R10,5 / Rm Maximum |
||||
| Minimum | Maximum | Minimum | Maximum | |||
| X56N, X56Q, X56M | 56,600 | 79,000 | 71,100 | 110,200 | 0.93 | 71,100 |
| a. For intermediate grades, the difference between the specified minimum tensile strength and the specified minimum yield strength for the pipe body shall be as given for the next higher grade. | ||||||
| b. For intermediate grades, the specified minimum tensile strength for the weld seam shall be the same as determined for the pipe body. | ||||||
| c. The specified minimum elongation (Af), expressed in percent, is determined using the standard API 5L equation. | ||||||
| U is the specified minimum tensile strength, expressed in megapascals (MPa) or pounds per square inch (psi). | ||||||
Lower values of the yield-to-tensile ratio (Rt0.5/Rm) may be specified by agreement. For API 5L grades above X90, reference should be made to the full API 5L specification.
API 5L Pipe – Tolerances for Outside Diameter, Out-of-Roundness and Wall Thickness
API 5L pipes are manufactured under strict dimensional tolerances to ensure reliable performance in oil, gas, water, and petrochemical pipeline systems. These tolerances control outside diameter, out-of-roundness, and wall thickness for both seamless and welded pipes, ensuring uniformity, strength, and proper fit during installation.
API 5L Pipe Sub-Products Covered Under These Tolerances:
- API 5L Grade B Pipe
- API 5L X42 Pipe
- API 5L X52 Pipe
- API 5L X56 Pipe
- API 5L X60 Pipe
- API 5L X65 Pipe
- API 5L X70 Pipe
- API 5L X80 Pipe