X60 loj- txoj kab uas hla steel kav yog tsim rau acidic ib puag ncig (kev pabcuam qaub) thiab muaj cov khoom tshwj xeeb tiv thaiv hydrogen-induced cracking (HIC) thiab sulfide stress corrosion (SSCC). Lawv lub zog tawm los yuav tsum ncav cuag 413-517 MPa, lub zog tensile Ntau dua lossis sib npaug ntawm 517 MPa, thiab Charpy cuam tshuam lub zog ntawm -20℃yuav tsum ncav cuag 40 J lossis ntau dua.
API 5L X60 loj- txoj kab uas hla welded yeeb nkab nruj me ntsis ua raws li 5L tus qauv tsim los ntawm American Petroleum Institute (API), uas tau teeb tsa cov cai kom meej rau cov tshuaj muaj pes tsawg leeg, cov khoom siv kho tshuab, thiab qhov ntev ntev ntawm cov kav dej steel kav.
mechanical zog
Hais txog cov khoom siv kho tshuab, "X60" hauv X60M qhia tias qhov muaj zog tsawg kawg nkaus ntawm 60,000 psi (kwv yees li 414 MPa). Ntxiv rau qhov yuav tsum tau muaj zog, API 5L X60 loj- txoj kab uas hla welded yeeb nkab kuj tseem qhia txog lub zog tensile (Ntau dua lossis sib npaug rau 517 MPa), elongation (longitudinal Ntau dua lossis sib npaug li 22%), thiab cuam tshuam toughness (Charpy V-notch cuam tshuam lub zog ntau dua los yog sib npaug ntawm 20 J). Cov kev xav tau ntawm kev ua haujlwm no ua rau cov khoom siv no tuaj yeem tiv taus qhov hnyav ntawm qhov siab - kev thauj mus los siab (feem ntau yog kev khiav hauj lwm siab ntawm 10-15 MPa) thiab nyuaj geological tej yam kev mob (xws li thaj av qeeg thiab cov av khov).
tshuaj muaj pes tsawg leeg
Hais txog cov tshuaj muaj pes tsawg leeg, API 5L X60 loj- txoj kab uas hla welded kav feem ntau siv qis -carbon microalloying tsim, nrog cov ntsiab lus carbon tswj qis dua 0.12%, thiab ntxiv cov microalloying ntsiab xws li niobium, vanadium, thiab titanium los txhim kho lub zog los ntawm kev ntxiv dag zog{5} thiab precipgrain. Cov ntsiab lus ntawm cov teeb meem xws li sulfur thiab phosphorus yog nruj me ntsis txwv (feem ntau S Less tshaj los yog sib npaug rau 0.005%, P Tsawg dua los yog sib npaug rau 0.015%) kom ntseeg tau zoo heev tiv thaiv hydrogen-induced cracking (HIC) thiab sulfide stress corrosion cracking (SSCC).
Daim ntawv thov
X60 loj- txoj kab uas hla welded kav feem ntau pab cov roj thiab cov kav xa hluav taws xob loj. X60M steel kav tau ua lub luag haujlwm tseem ceeb hauv kev tsim kho lub zog hla tebchaws xws li Central Asia-Tuam Tshoj Gas Pipeline thiab Tuam Tshoj-Russia East Route Gas Pipeline.
Muab piv rau cov kav dej welded, ncaj seam welded kav muaj qhov luv luv weld seams thiab qhov ua tau qis dua ntawm qhov tsis xws luag, muab cov txiaj ntsig kev nyab xeeb ntau dua nyob rau hauv siab - siab (feem ntau 8-12 MPa).
Raws li kev lag luam txheeb cais, ncaj seam welded kav rau ntau tshaj 80% ntawm siab - cov kav xa hluav taws xob siab nrog txoj kab uas hla tshaj 1016 hli.
Dhau li ntawm ib txwm siv roj thiab roj xa mus, X60 loj- txoj kab uas hla welded steel kav kuj tau dav siv nyob rau hauv cov chaw tawm tshiab xws li cov kav dej hauv nroog, sib sib zog nqus- hiav txwv pipelines, thiab CO2 cia tej yaam num.
Cov ntaub ntawv tshawb fawb ntawm lub nroog ntug dej hiav txwv cov roj xa hluav taws xob kho dua tshiab pom tau tias tom qab siv X60 loj- txoj kab uas hla ncaj seam steel kav, cov kav dej ua haujlwm siab tau nce los ntawm 0.4 MPa mus rau 4.0 MPa, nce roj kis tau kaum npaug, tsis muaj cov kav dej sib tsoo, ua kom tiav kev ntseeg siab ntawm cov khoom siv no.
API 5L X60 Loj Diameter yeeb nkab Hoobkas
