API 5L feem ntau yog hais txog kev siv tus qauv rau cov kav dej steel, uas suav nrog ob pawg tseem ceeb:seamless steel kavthiabwelded steel kav. Tam sim no, feem ntau siv welded steel yeeb nkab hom hauv cov roj kav dej yogkauv submerged arc welded kav(SSAW PIPE),longitudinal submerged arc welded kav(LSAW PIPE), thiabhluav taws xob kuj welded kav(ERW). Seamless steel kav yog feem ntau xaiv thaum lub kav dej txoj kab uas hla yog tsawg dua 152 hli.
Lub teb chaws tus qauv GB / T 9711-2011, Steel Pipes rau Pipeline Transportation Systems hauv Petroleum thiab Natural Gas Industries, tau tsim raws li API 5L.
GB / T 9711-2011 qhia meej txog kev tsim khoom rau seamless thiab welded steel kav siv nyob rau hauv cov roj av thiab cov nkev pipeline tsheb thauj mus los, npog ob theem khoom specification (PSL1 thiab PSL2). Yog li ntawd, tus qauv no tsuas yog siv rau seamless thiab welded steel kav rau roj thiab roj kis tau tus mob thiab tsis siv rau cam khwb cia hlau kav.
Qib Steel
API 5L steel kav siv ntau qib raw khoom suav nrog GR.B, X42, X46, X52, X56, X60, X70, X80, thiab lwm yam. Pipeline steels nrog qib X100 thiab X120 tau tsim tam sim no. Cov qib steel sib txawv tsim cov kev cai sib txawv ntawm cov khoom siv raw thiab cov txheej txheem ntau lawm.
Qib zoo
Nyob rau hauv API 5L tus qauv, cov kav dej steel zoo yog categorized li PSL1 lossis PSL2. PSL stands rau Product Specification Level.
PSL1 qhia meej txog qhov yuav tsum tau ua zoo rau cov raj xa dej; PSL2 ntxiv qhov yuav tsum tau ua rau cov tshuaj muaj pes tsawg leeg, kev sib tw toughness, lub zog muaj zog, thiab kev kuaj NDE ntxiv.
Post lub sij hawm: Sep-01-2025
