Size and Weight of Seamless Roll Steel Pipe Schedule,ASME B36.10M-1996
March 8, 2018
Seamless steel pipes for high temperature and pressure – Grade, Standard, Application ,Size
March 17, 2018
Different impact test methods for PSL1 and PSL2
b. API 5L PSL1 steel line pipe not required to do the impact test.
For API 5L PSL2 steel line pipe, except Grade X80, all the other grades of API 5L line pipe required the impact test at temperature of 0℃. The average value of Akv: longitudinal direction≥41J, tranverse direction≥27J. For API 5L Grade X80 PSL2 line pipe, at 0℃ for all the size, impact test the Akv average value: longitudinal direction≥101J, tranverse direction≥68J.
PSL 1 VS. PSL 2 SPEC SHEET
*PSL1 & PSL2 requirements are given in the latest edition of API 5L specifications
|
Parameter |
PSLl |
PSL2 |
|
Grade range |
A25 through X70 |
B through X80 |
|
Size range |
0.405 through 80 |
4V2 through 80 |
|
Type of Pipe Ends |
Plain-end, threaded-end; belled-end; special coupling pipe |
Plain-end |
|
Seam welding |
All methods; continuous welding limited to Grade A25 |
All methods except continuous and laser welding |
|
Electric welds: welder frequency |
No minimum |
100 kHz minimuiTi |
|
Heat treatment of electric welds |
Required for grades > X42 |
Required for all grades (B through X80) |
|
Chemistry: max C for seamless pipe |
0.28% for grades > B |
0.24% |
|
Chemistry: max C for welded pipe |
0.26% for grad^ > B |
0.22% |
|
Chemistry: max P |
0.030% for grades > A |
0.025% |
|
Chemistry: max S |
0.030% |
0.015% |
|
Carbon Equivalent |
Only when purchaser specifies SR18 |
Maximum required for each grade 4.2; 4.3; 6.1.3; SR15.1 |
|
Yield Strength, Maximum |
None |
Maximum for each grade |
|
UTS, Maximum |
None |
Maximum for each grade |
|
Fracture Toughness |
None required |
Required for all grades |
|
Nondestructive inspection of seamless |
Only when purchaser specifies SR4 |
SR4 mandatory |
|
Repair by welding of pipe body, plate, and skelp |
Permitted |
Prohibited |
|
Repair by welding of weld seams with- Permitted by agreement out filler metal |
Prohibited |
|
|
Certification |
Certificates when specified per SR15 |
Certificates (SRI5.1) mandatory |
|
Traceability |
Traceable only until all tests are passed, unless SR 15 is specified |
Traceable after completion of tests (SR15.2) mandatory |
Different chemical composition for API 5L line pipe in PSL1 and PSL2
d. Chemical composition and mechanical strength is also different between API 5L PSL1 line pipe and API 5L PSL2 line pipe. For the detailed specification as below. API 5L PSL2 have restrictions with the carbon equivalent content, where for the carbon mass fraction greater than 0.12%, and equal or less than 0.12%. Different CEQ shall be applied. For line pipe in PSL2 tensile strength have maximum limits. More info please review API 5L Specification part 9.2 and 9.3.
