1. X70 yog dab tsi?
Tus nqi ntawm API 5L X70 yeeb nkab tsis yog ruaj khov thiab sib txawv raws li kev lag luam steel thoob ntiaj teb, kev txiav txim kom muaj nuj nqis, qhov ntev, thiab cov chaw tsim khoom. Raws li kev lag luam siv los ntawm kev lag luam online, tus nqi tuaj yeem nyob ntawm kwv yees li$ 575 rau $ 680 ib metric tonrau kev txiav txim loj ntim (300+ metric tons thiab 5-24 metric tons, raws li)-7. Cov duab no yog rau kev piav qhia dav dav nkaus xwb, thiab cov lus qhia ua haujlwm yuav tsum tau txais los ntawm steel mills lossis cov chaw muag khoom.
2. Qhov ntev thiab qhov dav ntawm X70 yog dab tsi?
"Dav" feem ntau hu ua txoj kab uas hla lossis sab nraud (OD) rau cov yeeb nkab. API 5L X70 yeeb nkab yog tsim nyob rau hauv ntau qhov ntau thiab tsawg tus qauv. Feem ntau muaj ntev yog feem ntau nruab nrab ntawm5.8m thiab 12m-7. Cov yeeb nkab txoj kab uas hla tuaj yeem sib txawv raws li qhov project, feem ntau los ntawm ib ncig ntawm 21.3 hli mus rau ntau dua 914 mm-5. Qhov tshwj xeeb qhov ntev yog dictated los ntawm cov kev cai tsim cov kav dej.
3. X70 hnyav npaum li cas?
Qhov hnyav ntawm X70 yeeb nkab tsis yog ib qho nqi tab sis yog xam raws li nws qhov tshwj xeeb qhov ntev (sab nraud txoj kab uas hla thiab phab ntsa tuab) thiab qhov ntom ntawm cov hlau. Nws yog feem ntau qhia raws li qhov hnyav ntawm ib chav tsev ntev (piv txwv li, kilograms ib 'meter'). Koj tuaj yeem xam qhov kwv yees qhov hnyav uas siv cov mis rau qhov loj ntawm ib lub cylindrical steel seem, factoring hauv cov yeeb nkab lub cev qhov ntev.
4. Qhov ntsuas kev nyab xeeb ntawm X70 yog dab tsi?
API 5L X70 nws tus kheej tsis muaj ib qho "kev ntsuas kev nyab xeeb." Hloov chaw, nws txoj kev nyab xeeb thiab kev ntseeg siab hauv kev pabcuam yog ua kom ntseeg tau los ntawm kev ua raws li covyam tsawg kawg nkaus txhua yam thiab tshuaj muaj zogKev tswj hwm los ntawm API 5L tus qauv (xws li, lub zog tawm los, lub zog tensile, cuam tshuam toughness)-3-4. Qhov kawg kev nyab xeeb ntawm lub raj xa dej yog nyob ntawm tus qauv tsim raws li cov cai hauv kev lag luam, kev tsim khoom raws li kev tsim nyog, cov txheej txheem vuam tsim nyog, kev tshuaj xyuas zoo (nrog rau kev sim tsis muaj kev puas tsuaj), thiab txhim kho thiab ua haujlwm kom raug.
Kuv vam tias cov lus teb ntxaws no yuav pab tau rau koj qhov project lossis kev tshawb fawb. Yog tias koj muaj lus nug tshwj xeeb ntxiv txog qee yam ntawm pipeline engineering, thov koj xav nug.
5. Dab tsi yog cov teeb meem tshwm sim nrog X70?
Thaum cov khoom siv muaj zog, X70 cov kav dej tuaj yeem ntsib cov teeb meem tshwj xeeb, feem ntau cuam tshuam nrog vuam thiab huab cua txias:
Vuam Zone Cracking:Thaum tshav kub kub-Teb chaws cuam tshuam (HAZ) ntawm girth welds tuaj yeem yog thaj chaw tsis muaj zog. Kev tshawb fawb tau sau tseg qhov ua tsis tiav qhov twg cov kab nrib pleb nthuav tawm los ntawm HAZ, tshwj xeeb yog nyob rau hauv cov xwm txheej zoo li hauv av txav los yog qeeb heev ntawm tus nqi-6.
Performance Degradation los ntawm hluav taws:Kev raug hluav taws kub tuaj yeem ua rau cov khoom siv tau zoo. Cov kev tshawb fawb soj ntsuam "kev qoj ib ce- rau- kev pabcuam" tom qab hluav taws kub tau pom tias qhov kub thiab txias tuaj yeem hloov kho microstructure ntawm X70 steel, txo nws lub zog tensile, cuam tshuam qhov hnyav, thiab tag nrho kev nyab xeeb margin-8.
Weldability thiab Hydrogen Embrittlement:Raws li qib siab zog, X70 tuaj yeem cuam tshuam rau cov teeb meem weldability thiab hydrogen embrittlement, tshwj xeeb tshaj yog thaum txuas nrog cathodic tiv thaiv systems-9.
