Difference Between PSL1 and PSL2 Pipe
PSL1 Vs PSL2 Pipe
The American Petroleum Institute (API) designates different specifications of API line pipe. There are two specs PSL-1 and PSL-2 comes under API 5L. These specs cover seamless and welded API steel line pipe from grades X42 through X80. API 5L Line Pipes is suitable for transporting fluids such as gas, water, and oil, and is usually found in the hydrocarbon petroleum and natural gas industry. PSL-1 and PSL-2 are standards that have been put in place to help with the more strict requirements for each grade. API 5L PSL2 are known for better performance in comparison to PSL1 as it has stricter inspection requirements, chemical composition and mechanical performance requirements. API Line pipe production should include the hydraulic pressure test, and standards are not allowed to nondestructive generation of hydraulic pressure, nondestructive inspection is not required for PSL1, while each API 5L PSL2 pipe shall go through nondestructive examination one by one.
PSL1
PSL1 Chemical Composition
TYPE | Steel grade | C | Si | Mn | P | S |
---|---|---|---|---|---|---|
API 5L PSL1 | B | ≤0.28 | - | ≤1.20 | ≤0.03 | ≤0.03 |
API 5L PSL1 | X42 | ≤0.28 | - | ≤1.3 | ≤0.03 | ≤0.03 |
API 5L PSL1 | X46 | ≤0.28 | - | ≤1.4 | ≤0.03 | ≤0.03 |
API 5L PSL1 | X52 | ≤0.28 | - | ≤1.4 | ≤0.03 | ≤0.03 |
API 5L PSL1 | X56 | ≤0.28 | - | ≤1.4 | ≤0.03 | ≤0.03 |
API 5L PSL1 | X60 | ≤0.28 | - | ≤1.4 | ≤0.03 | ≤0.03 |
API 5L PSL1 | X70 | ≤0.28 | - | ≤1.4 | ≤0.03 | ≤0.03 |
PSL1 Mechanical Properties
TYPE | Steel grade | Tensile strength (Mpa) | Yield strength (Mpa) | Elongation |
---|---|---|---|---|
API 5L PSL1 | B | ≥415 | ≥245 | As per API 5L |
API 5L PSL1 | X42 | ≥415 | ≥290 | As per API 5L |
API 5L PSL1 | X46 | ≥435 | ≥320 | As per API 5L |
API 5L PSL1 | X52 | ≥460 | ≥360 | As per API 5L |
API 5L PSL1 | X56 | ≥490 | ≥390 | As per API 5L |
API 5L PSL1 | X60 | ≥520 | ≥415 | As per API 5L |
API 5L PSL1 | X70 | ≥565 | ≥483 | As per API 5L |
API SPEC 5L PSL1
A25 | 172 | 310 | ||
A | 207 | 331 | ||
B | 241 | 414 | ||
X42 | 290 | 414 | ||
X46 | 317 | 434 | ||
X52 | 359 | 455 | ||
X56 | 386 | 490 | ||
X60 | 414 | 517 | ||
X65 | 448 | 531 | ||
X70 | 483 | 565 |
PSL2
Chemical composition PSL2
Standard | Grade | C | Mn | P | S | |
---|---|---|---|---|---|---|
Max | Max | Min | Max | Max | ||
API SPEC 5L | PSL1 | |||||
A25II | 0.21 | 0.60 | 0.030 | 0.030 | ||
A25III | 0.21 | 0.60 | 0.45 | 0.80 | 0.030 | |
A | 0.22 | 0.90 | 0.030 | 0.030 | ||
B | 0.28 | 1.20 | 0.030 | 0.030 | ||
X42 | 0.28 | 1.30 | 0.030 | 0.030 | ||
X46.X52.X56 | 0.28 | 1.40 | 0.030 | 0.030 | ||
X60.X65.X70 | 0.28 | 1.40 | 0.030 | 0.030 | ||
PSL2 | ||||||
B | 0.24 | 1.20 | 0.025 | 0.015 | ||
X42 | 0.24 | 1.30 | 0.025 | 0.015 | ||
X46.X52.X56 | 0.24 | 1.40 | 0.025 | 0.015 | ||
X60.X65.X70.X80 | 0.24 | 1.40 | 0.025 | 0.015 |
API SPEC 5L PSL2
Min | Max | Min | Max | |
---|---|---|---|---|
B | 241 | 448 | 414 | 758 |
X42 | 290 | 496 | 414 | 758 |
X46 | 317 | 524 | 434 | 758 |
X52 | 359 | 531 | 455 | 758 |
X56 | 386 | 544 | 490 | 758 |
X60 | 414 | 565 | 517 | 758 |
X65 | 448 | 600 | 531 | 758 |
X70 | 483 | 621 | 565 | 758 |
X80 | 552 | 690 | 621 | 827 |
PARAMETER |
PSL1 |
PSL2 |
---|---|---|
Grade Range | A25 through X70 | B through X80 |
Size range | 0.405″ through 80″ | 4.5″ through 80″ |
Type of ends | Plain end, Threaded end,Bevelled end special coupling pipes | Plain end |
Seam welding | All methods: continuous welding limited to A25 | All methods: except continuous welding and laser welding |
Electric welds: welder frequency | No minimum | kHz minimum 100 |
Heat treatment of electric welds | Required for grades >X42 | Required for all grades (B through X80) |
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