API 5L pipes may be classified according to the following criteria:
1, Execution: seamless or welded (seamless pipes may be used up to 24 inches, LSAW above 24 inches, ERW up to 20 inches)
2, Specification level (API PSL1, PSL2): PSL1 is a standard quality used for pipelines, whereas PSL2 sets more stringent chemical, mechanical properties, and testing requirements
3, Surface finish: black, varnish painted, anti-rust oil, galvanized, coated externally (3PL) and/or lined internally
4, Ends types: plain, beveled, threaded ends
The main advantages of API 5L pipe are:
1, Resistance to cracking forces that may propagate in long pipelines
2, Sour service suitability
3, Rather inexpensive and long service life (at least grades B, X42)
Size Range
API 5L pipes are available in dimensions between from 2 to 28″ (seamless execution) and up to 80″ in welded execution (generally, LSAW i.e. longitudinal submerged arc welding).
API 5L PIPE PSL1 Chemical and Mechanical Properties | |||||||||
API 5L PIPE PSL1 | Chemical Composition | Mechanical Property | |||||||
C (Max) | Mn (Max) | P (Max) | S (Max) | TENSILE ( Min ) | YIELD ( Min ) | ||||
Psi X 1000 | Mpa | Psi X 1000 | Mpa | ||||||
Grade A25 | CL I | 0.21 | 0.60 | 0.030 | 0.030 | 45 | 310 | 25 | 172 |
CL II | 0.21 | 0.60 | 0.030 | 0.030 | |||||
Grade A | 0.22 | 0.90 | 0.030 | 0.030 | 48 | 331 | 30 | 207 | |
Grade B | 0.26 | 1.20 | 0.030 | 0.030 | 60 | 414 | 35 | 241 | |
Grade X42 | 0.26 | 1.30 | 0.030 | 0.030 | 60 | 414 | 42 | 290 | |
Grade X46 | 0.26 | 1.40 | 0.030 | 0.030 | 63 | 434 | 46 | 317 | |
Grade X52 | 0.26 | 1.40 | 0.030 | 0.030 | 66 | 455 | 52 | 359 | |
Grade X56 | 0.26 | 1.40 | 0.030 | 0.030 | 71 | 490 | 56 | 386 | |
Grade X60 | 0.26 | 1.40 | 0.030 | 0.030 | 75 | 517 | 60 | 414 | |
Grade X65 | 0.26 | 1.45 | 0.030 | 0.030 | 77 | 531 | 65 | 448 | |
Grade X70 | 0.26 | 1.65 | 0.030 | 0.030 | 82 | 565 | 70 | 483 |
API 5L PIPE PSL2 Chemical and Mechanical Properties | ||||||||||||
API 5L PIPE | Chemical Composition | Mechanical Property | ||||||||||
C | Mn | P | S | Tensile | Yield | C. E. IMPACT ENERGY | ||||||
Psi x 1000 | Mpa | Psi x 1000 | Mpa | PCM | IIW | J | FT/LB | |||||
Grade B | 0.22 | 1.20 | 0.025 | 0.015 | 60 – 110 | 414 – 758 | 35 – 65 | 241 – 448 | 0.25 | 0.43 | T/L 27/41 | T/L 20/30 |
Grade X42 | 0.22 | 1.30 | 0.025 | 0.015 | 60 – 110 | 414 – 758 | 42 – 72 | 290 – 496 | 0.25 | 0.43 | T/L 27/41 | T/L 20/30 |
Grade X46 | 0.22 | 1.40 | 0.025 | 0.015 | 63 – 110 | 434 – 758 | 46 – 76 | 317 – 524 | 0.25 | 0.43 | T/L 27/41 | T/L 20/30 |
Grade X52 | 0.22 | 1.40 | 0.025 | 0.015 | 66 – 110 | 455 – 758 | 52 – 77 | 359 – 531 | 0.25 | 0.43 | T/L 27/41 | T/L 20/30 |
Grade X56 | 0.22 | 1.40 | 0.025 | 0.015 | 71 – 110 | 490 – 758 | 56 – 79 | 386 – 544 | 0.25 | 0.43 | T/L 27/41 | T/L 20/30 |
Grade X60 | 0.22 | 1.40 | 0.025 | 0.015 | 75 – 110 | 517 – 758 | 60 – 82 | 414 – 565 | 0.25 | 0.43 | T/L 27/41 | T/L 20/30 |
Grade X65 | 0.22 | 1.45 | 0.025 | 0.015 | 77 – 110 | 531 – 758 | 65 – 82 | 448 – 565 | 0.25 | 0.43 | T/L 27/41 | T/L 20/30 |
Grade X70 | 0.22 | 1.65 | 0.025 | 0.015 | 82 – 110 | 565 – 758 | 70 – 82 | 483 – 565 | 0.25 | 0.43 | T/L 27/41 | T/L 20/30 |
Grade X80 | 0.22 | 1.90 | 0.025 | 0.015 | 90 – 120 | 621 – 827 | 80 – 102 | 552 – 705 | 0.25 | 0.43 | T/L 27/41 | T/L 20/30 |
API 5L Equivalent Grades (ASTM, EN, DIN)
Line Pipe Materials: Werkstoff vs EN vs API | ||
DIN | EN | API |
1.0486 StE 285 | – | API 5L Grade X42 |
1.0562 StE 355 | P355N | API 5L Grade X52 |
1.8902 StE 420 | P420N | API 5L Grade X60 |
1.8905 StE 460 | P460N | API 5L Grade X70 |
High Yield Steel Pipes | ||
1.0457 StE 240.7 | L245NB | API 5L Grade B |
1.0484 StE 290.7 | L290NB | API 5L Grade X42 |
1.0582 StE 360.7 | L360NB | API 5L Grade X52 |
1.8972 StE 415.7 | L415NB | API 5L Grade X60 |
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