1. Q: Qhov sib txawv ntawm API 5L PSL1 thiab PSL2 yog dab tsi?
A:PSL2 (Product Specification Level 2) muaj cov kev xav tau nruj dua li PSL1, suav nrog kev ua kom muaj zog ntau dua (Charpy V-Kev ntsuas qhov ntsuas), kev tswj cov tshuaj lom neeg nruj dua, nruj dua tsis yog- kuaj kev puas tsuaj (NDT), thiab yuav tsum kuaj hydrostatic rau txhua qhov ntau thiab tsawg. PSL1 yog rau cov ntawv thov tsawg dua.
2. Q: Vim li cas API 5L X65 thiaj li muaj ntau qib rau cov kav dej xa mus rau sab hnub tuaj thiab sab nraud?
A:X65 muaj qhov sib npaug zoo ntawm lub zog siab (65,000 psi yam tsawg kawg nkaus lub zog), zoo weldability, thiab tawg toughness. Qhov no tso cai rau kev ua haujlwm siab dua, muaj peev xwm txo cov phab ntsa tuab thiab cov nqi khoom siv thaum tswj kev nyab xeeb hauv qhov xav tau ib puag ncig.
3. Q: Thaum twg koj yuav qhia API 5L X80 lossis siab dua (X100, X120)?
A:Cov no ultra- siab- lub zog steels (UHSS) yog siv nyob rau hauv siab - siab, loj - txoj kab uas hla (piv txwv li, ntev- cov kav xa hluav taws xob deb) kom txo cov phab ntsa tuab thiab qhov hnyav. Qhov no txo qis cov khoom siv, kev thauj mus los, thiab vuam cov nqi, tab sis yuav tsum tau ua tib zoo siv cov txheej txheem vuam thiab cov tshuab puas ntsoog vim muaj kev cuam tshuam ntau ntxiv rau hydrogen -induced cracking (HIC).
4. Q: "HIC Testing" yog dab tsi thiab cov qib / ib puag ncig xav tau nws?
A:Hydrogen-Induced Cracking (HIC) testing a steel's resistance to cracking in wet H₂S service. Nws yog feem ntau teev rau cov ntawv thov kev pabcuam qaub. Cov qib zoo li API 5L X65S lossis X52O ("S" lossis "O" cov lus feem ntau qhia txog qhov tsim nyog rau kev pabcuam qaub) tau ua tiav nrog cov tshuaj chemistry (tsawg leej faj, kho calcium) thiab microstructure kom dhau cov qauv HIC (xws li, NACE TM0284).
5. Q: Dab tsi yog "O" hauv API 5L X52O, thiab nws txawv li cas ntawm tus qauv X52?
A:Lub "O" sawv cev rau "Offshore" los yog qhia txog kev txhim kho cov khoom siv rau kev siv ntug dej hiav txwv. Cov yeeb nkab cim nrog "O" feem ntau tau txhim kho los ntawm - thickness ductility (siab dua Z- cov khoom yuav tsum tau muaj) los tiv thaiv lamellar tearing thaum lub sij hawm tsim cov txheej txheem sab nraud xws li tsho thiab risers.
