API 5LPuas yog tus qauv rau cov kab hlau kab siv los thauj cov roj, nkev, thiab dej. Tus qauv npog tau ntau qib sib txawv ntawm cov hlau, ntawm uas X42 thiab X52 yog ob qib kawm. Lub ntsiab sib txawv ntawm X42 thiab X52 yog lawv cov khoom siv neeg kho tshuab, tshwj xeeb tshaj tawm lub zog thiab lub zog tensile.

X42: Yam tsawg kawg nkaus los lub zog ntawm X42 cov yeeb nkab steel yog 42,000 psi (290 MPa (290 mpa), thiab nws lub zog tensile li ntawm 60,000-75,000 PSI (415-520 mpa). X42 qib steel yeeb nkab feem ntau yog siv nyob rau hauv cov raj hluav taws xob nrog nruab nrab siab thiab muaj zog rau kev thauj khoom xws li roj, thiab dej.

X52: Yam tsawg kawg nkaus los lub zog ntawm x52 cov yeeb nkab steel yog 52,000 psi (360 MPa), thiab lub zog tensile li ntawm 66,000-95,000 psi (455-655 mpa). Piv nrog X42, X52 qib steel yeeb nkab muaj zog dua thiab yog qhov tsim nyog rau cov tshuab hluav taws xob nrog siab dua thiab muaj zog ua kom muaj.

Hais txog cov khoom xa tuaj,API 5L Txuj CiQhia meej txog cov xwm txheej txawv rau Seamless steel kav thiab welded kav dej:

Seamless steel yeeb nkab (n lub xeev): n lub xeev hais txog lub xeev kev kho mob ib txwm muaj. Seamless steel kav yog qhov qub ua ntej xa mus rau homogenize lub microstructure ntawm cov yeeb nkab steel, yog li kev txhim kho nws cov khoom siv thiab tawv. Normalizing tuaj yeem tshem tawm cov kev ntxhov siab ntau dua thiab txhim kho txoj kev ruaj khov ntawm cov yeeb nkab steel.

Welded Yeeb Nkab (M State): M State yog hais txog qhov kev kho thermomechanical ntawm welded yeeb nkab tom qab ua thiab vuam. Los ntawm Kev Kho Mob Thermomechanical, microstructure ntawm Welded yeeb nkab tau txhim kho, thiab lub zog ntawm cov yeeb nkab welded thaum siv yog kom ntseeg tau.

API 5L Txuj CiQhia meej txog cov tshuaj lom neeg cov tshuaj muaj pes tsawg leeg, cov hau kev siv neeg, kev tshuaj xyuas cov qauv, tshuaj xyuas thiab cov ntawv xeem ntawm cov raj xa dej hlau. Kev siv cov qauv kom ntseeg tau tias muaj kev nyab xeeb thiab kev ntseeg siab ntawm cov pipeline steel kav thaum thauj roj, nkev thiab lwm yam dej. Cov kev xaiv ntawm cov qib tsim nyog ntawm cov kav hlau hlau thiab cov xwm txheej tuaj yeem ua tau raws li cov kev xav tau ntawm cov haujlwm engineering thiab kom cov haujlwm ruaj khov ntawm cov raj xa dej.