API 5L tus qauv yog tus qauv rau seamless thiab welded steel kav siv hauv kev lag luam roj thiab roj. PSL1 thiab PSL2 yog ob theem ntawm API 5L, ob qho tib si yog cov qauv rau cov kav dej steel kav.
PSL1 tus qauv xav kom cov yeeb nkab steel kom dhau qhov kev ntsuas tensile ntawm chav tsev kub thiab ua tau raws li cov khoom siv tshwj xeeb. Cov kev xav tau no suav nrog lub zog tensile, lub zog tawm los, elongation, thiab lub zog cuam tshuam.
PSL1 tus qauv steel kav feem ntau yog siv los thauj cov kua dej xws li roj thiab nkev, yog li yuav tsum tau muaj kev tiv thaiv corrosion thiab siab ua haujlwm. Tsis tas li ntawd, vim tias cov kua dej no feem ntau muaj qhov kub thiab txias siab, cov kav hlau steel kuj yuav tsum muaj kev tiv thaiv siab rau qhov kub thiab txias.
API 5L PSL1 VS API 5L PSL2
| Sib piv Dimension | PSL1 (Basic) | PSL2 (High-Kev Ua Haujlwm) |
|---|---|---|
| Daim ntawv thov Scenario | Tsawg-siab / tsis yog- cov kav dej tseem ceeb (xws li cov kav dej) |
Siab -siab / qaub kev pabcuam / arctic pipelines (xws li gas kis kab mob) |
| Mechanical Properties | Tsis muaj kev cuam tshuam lub zog xav tau | Ntau tshaj lossis sib npaug rau 27J ntawm -30 degree (tiv thaiv brittle fracture) |
| Tsis yog -Kev kuaj kev puas tsuaj | Hydrostatic xeem sampling | 100% UT + Eddy Tam sim no tshuaj xyuas |
| Tshuaj Tswj | Lax (S Tsawg dua lossis sib npaug rau 0.030%) |
nruj (S Tsawg dua lossis sib npaug rau 0.010%, P Tsawg dua lossis sib npaug li 0.025%) |
| Dimensional kam rau ua | Standard precision (WT +15%/-12.5%) |
High precision (WT li+10%/-0%) |
| Tsawg-Tseem siv tau | ＞-5 degree | -46 degree (arctic pipelines xav tau PSL2) |
| Acid Corrosion Resistance | Tsis yog rau H₂S ib puag ncig | NACE testedrau sulfide kuj |
| Tus nqi sib txawv | Tus nqi pib | 8% -15% hwm |
Kev sim thiab tshuaj xyuas ntawm API 5L PSL1 thiab PSL2 kab yeeb nkab
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