API-5L tus qauv kauv steel yeeb nkab yog tus qauv tshwj xeeb rau cov kav dej steel kauv steel yeeb nkab tau tsim los ntawm American Petroleum Institute (API). Nws yog ib qho ntawm feem ntau siv thiab nrov pipeline steel qauv nyob rau hauv lub ntiaj teb no.
API-5L tus qauv npog cov kev cai tsim khoom rau cov kav dej steel kauv steel kav, tshwj xeeb tshaj yog hais txog lub zog tensile, yield zog, chav kub cuam tshuam toughness, elongation ntawm tawg, thiab lwm yam. Raws li hom yeeb nkab steel, API{{ 1}}L tau muab faib ua cov kav hlau dav dav thiab cov kav hlau tshwj xeeb, thiab cov kav hlau dav dav tau muab faib ua cov kav hlau zoo tib yam thiab cov kav hlau muaj zog. kuv lub teb chaws tus GB/T9711-2017 tus qauv thiab API-5L American Petroleum Institute steel yeeb nkab qauv yog qhov zoo ib yam thiab tuaj yeem siv sib npaug.
Cov khoom siv hlau phaj siv hauv API-5L tus qauv kauv steel yeeb nkab yog X42-X100, uas sib haum rau peb L245-L690. Kev tsim muaj peev xwm ntawm kauv steel kav mus txog GB/T3091-2015 tus qauv, GB/T9711-2017 tus qauv thiab APL-5L tus qauv. Kauv steel yeeb nkab GB/T3091-2015 tus qauv thiab GB/T9711-2017 tus qauv yog ob lub teb chaws tus qauv. GB/T{10}} tus qauv, GB/T{11}} tus qauv, API cov qauv, siv los qhia txog cov kev xav tau ntawm kev ua haujlwm thiab lub cev, tshuaj lom neeg thiab cov khoom siv ntawm cov kav dej steel.
