API 5L yog tus qauv uas qhia txog qhov yuav tsum tau ua rau cov kav hlau siv hauv kev lag luam roj thiab roj. Tus qauv muaj ob yam khoom sib txawv (PSL), uas yog PSL1 thiab PSL2.
API 5L PSL1tsuas yog xav kom cov kav dej yuav tsum tau tsim nrog cov txheej txheem ib txwm ua thiab sim ua kom zoo. Cov kav dej uas ua raws li cov qauv PSL1 feem ntau yog siv rau kev xa cov roj av, roj av, thiab cov khoom siv roj av. Qhov kev qhia tshwj xeeb no tso cai rau cov txheej txheem tsim khoom yooj yim dua, tsis tshua muaj nqi, uas ua rau nws yooj yim dua rau cov tswv lag luam me.
API 5L PSL2, yuav tsum muaj kev tsim khoom nruj dua thiab kuaj cov lus qhia tshwj xeeb. Qhov kev qhia tshwj xeeb no feem ntau xav tau rau cov phiaj xwm kav dej uas ua haujlwm nyob rau hauv ib puag ncig hnyav lossis rau cov ntawv thov kev nyab xeeb tseem ceeb. PSL2 specification muaj xws li cov kev cai rau cov tshuaj muaj pes tsawg leeg, mechanical testing, non-destructive testing, thiab ntxiv kuaj rau weldability. Qhov kev qhia tshwj xeeb no yuav ua kom ntseeg tau tias cov kav dej tuaj yeem tiv taus cov xwm txheej hnyav, txo qhov kev pheej hmoo ntawm kev tsis ua haujlwm lossis kev sib tsoo.
Hauv kev xaus, qhov sib txawv tseem ceeb ntawm API 5L PSL1 thiab PSL2 yog nyob rau hauv lawv cov kev tsim khoom thiab kev sim. PSL2 yuav tsum muaj kev lees paub zoo dua, ua rau nws tsim nyog rau cov ntawv thov tseem ceeb. Ob qho tib si yog qhov tseem ceeb tshwj xeeb uas ua rau muaj txiaj ntsig zoo thiab kev ua haujlwm ntawm cov kav dej thiab ua kom muaj kev nyab xeeb thiab ua tiav ntawm cov khoom siv roj thiab roj.
