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The following is the standard data, we will do our best to follow the customers' requirements and the agreement to perform.
| Production | SSAW(API 5L PSL1) steel pipe |
| Process of manufacture | As-rolled,Heat-treated |
| Type of length | Fixed ruler and Double ruler |
| Inspection and Test | Tensile test,Hydrostatic test,CVN impact test,Non-destructive inspection and as agreed |
OD Tolerance
| Outside diameter ,D(mm) | Tolerances(mm) | |
| Pipe except the end | Pipe end | |
| <60.3 | -0.8 to +0.4 | -0.8 to +0.4 |
| ≥60.3 to 168.3 | ±0.0075D | -0.4 to +1.6 |
| >168.3 to 610 | ±0.0075D,but maximum of ±3.2 | ±0.005D,but maximum of ±1.6 |
| >610 to 1422 | ±0.005D,but maximum of ±4.0 | ±1.6 |
| >1422 | as agreeed | |
| The pipe end incloudes a length of 100mm at each of the pipe extremities. | ||
WT Tolerance
| Wall Thickness,t(mm) | Tolerances(mm) |
| ≤5 | ±0.5 |
| >5 to <15 | ±0.1t |
| ≥15 | ±1.5 |
Chemical Composition
| Pipe/Steel grade | C(%)≤ | Mn(%)≤ | P(%)≥ | P(%)≤ | S(%)≤ | V(%)≤ | Nb(%)≤ | Ti(%)≤ |
| L175/A25 | 0.21 | 0.6 | 0.03 | 0.03 | ||||
| L175P/A25P | 0.21 | 0.6 | 0.045 | 0.08 | 0.03 | |||
| L210/A | 0.22 | 0.9 | 0.03 | 0.03 | ||||
| L245/B | 0.26 | 1.2 | 0.03 | 0.03 | c,d | c,d | d | |
| L290/X42 | 0.26 | 1.3 | 0.03 | 0.03 | d | d | d | |
| L320/X46 | 0.26 | 1.4 | 0.03 | 0.03 | d | d | d | |
| L360/X52 | 0.26 | 1.4 | 0.03 | 0.03 | d | d | d | |
| L390/X56 | 0.26 | 1.4 | 0.03 | 0.03 | d | d | d | |
| L415/X60 | 0.26 | 1.4 | 0.03 | 0.03 | f | f | f | |
| L450/X65 | 0.26 | 1.45 | 0.03 | 0.03 | f | f | f | |
| L485/X70 | 0.26 | 1.65 | 0.03 | 0.03 | f | f | f | |
| a.Cu≤0.5%;Ni≤0.5%;Cr≤0.5% and Mo≤0.15% | ||||||||
| c.Unless otherwise agreed,Nb+V≤0.06% | ||||||||
| d.Nb+VT+Ti≤0.15% | ||||||||
| f.Unless otherwise agreed,Nb+V+Ti≤0.15% | ||||||||
| g.No deliberate addition of B is permitted and the residual B≤0.001% | ||||||||
Tensile Properties
| Pipe/Steel Grade | Yield Strength (Mpa/psi)≥ | TensileStrength(Mpa/psi)≥ |
| L175/A25 | 175(25400) | 310(45000) |
| L175P/A25P | 175(25400) | 310(45000) |
| L210/A | 210(30500) | 335(48600) |
| L245/B | 245(35500) | 415(60200) |
| L290/X42 | 290(42100) | 415(60200) |
| L320/X46 | 320(46400) | 435(63100) |
| L360/X52 | 360(52200) | 460(66700) |
| L390/X56 | 390(56600) | 490(71100) |
| L415/X60 | 415(60200) | 520(75400) |
| L450/X65 | 450(65300) | 535(77600) |
| L485/X70 | 485(70300) | 570(82700) |
SSAW Pipes Manufacturing Process
