Standard specifications
API 5Lfeem ntau yog hais txog kev ua tiav rau cov kav dej steel kav. Pipeline steel kav muaj xws li seamless steel kav thiab welded steel kav. Tam sim no, feem ntau siv welded steel yeeb nkab hom ntawm cov roj pipelines muaj xws li kauv submerged arc welded yeeb nkab (SSAW), ncaj seam submerged arc welded yeeb nkab (LSAW), thiab hluav taws xob tsis kam welded yeeb nkab (ERW). Seamless steel kav feem ntau xaiv thaum cov yeeb nkab txoj kab uas hla yog tsawg dua 152mm.
Lub teb chaws tus qauv GB / T 9711-2011 Steel kav rau roj thiab roj kev lag luam pipeline tsheb thauj mus los yog muab tso ua ke raws liAPI 5L.
GB / T 9711-2011 qhia txog kev tsim cov kav dej seamless steel thiab welded steel kav ntawm ob theem khoom specification (PSL1 thiab PSL2) siv nyob rau hauv cov roj thiab roj pipeline tsheb thauj mus los. Yog li ntawd, tus qauv no tsuas yog siv rau cov kav dej seamless steel thiab welded steel kav rau roj thiab roj tsheb thauj mus los, thiab tsis siv rau cov kav hlau cam.
Qib hlau
Cov ntaub ntawv raw steel qib ntawmAPI 5Lsteel kav muaj xws li GR.B, X42, X46, X52, X56, X60, X70, X120 pipeline steel. Cov qib steel sib txawv ntawm cov kav hlau muaj qhov sib txawv rau cov khoom siv raw thiab kev tsim khoom, tab sis cov pa roj carbon sib npaug ntawm cov qib steel sib txawv yog tswj nruj heev.
Tus Qauv Zoo
Hauv API 5L steel yeeb nkab tus qauv, cov qauv zoo (lossis cov kev xav tau) ntawm cov kav hlau tau muab faib ua PSL1 thiab PSL2. PSL yog lub npe luv ntawm cov khoom specification qib.
PSL1 muab cov kav dej dav dav hlau yeeb nkab zoo raws li qhov yuav tsum tau ua; PSL2 ntxiv qhov yuav tsum tau ua rau cov tshuaj muaj pes tsawg leeg, tsis muaj zog, lub zog muaj zog thiab ntxiv NDE.
Cov yeeb nkab steel qib ntawm PSL1 steel yeeb nkab (lub npe qhia lub zog theem ntawm cov yeeb nkab steel, xws li L290, 290 hais txog qhov tsawg kawg nkaus yield zog ntawm cov yeeb nkab lub cev yog 290MPa) thiab qib steel (los yog qib, xws li X42, qhov twg 42 sawv cev rau qhov tsawg kawg nkaus yield zog los yog lub zog nce siab ntawm cov yeeb nkab steel yeeb nkab) yam tsawg kawg nkaus yield. Nws yog tsim los ntawm cov tsiaj ntawv los yog ib tug sib xyaw ntawm cov tsiaj ntawv thiab cov zauv uas txheeb xyuas lub zog ntawm cov yeeb nkab steel, thiab qib steel muaj feem xyuam rau cov tshuaj muaj pes tsawg leeg ntawm cov hlau.
PSL2 steel kav yog tsim los ntawm cov ntawv los yog ib qho kev sib txuas ntawm cov tsiaj ntawv thiab cov lej siv los txheeb xyuas cov qib zog ntawm cov yeeb nkab steel. Lub npe steel (qib steel) muaj feem xyuam rau cov tshuaj muaj pes tsawg leeg ntawm cov hlau. Nws kuj tseem suav nrog ib tsab ntawv (R, N, Q lossis M) ua cov lus, uas qhia txog kev xa khoom. Rau PSL2, tom qab kev xa khoom, tseem muaj tsab ntawv S (ib puag ncig kev pabcuam acid) lossis O (ib puag ncig kev pabcuam hauv hiav txwv) qhia txog kev pabcuam.