1. Qhov txiaj ntsig ntawm API 5L X70 yog dab tsi?
Qhov tsawg kawg nkaus yield zog rau API 5L X70 yog70,000 phaus ib square inch (psi), uas yog sib npaug rau485 megapascals (MPa)-1-3. Rau cov kav xa dej tau tsim kom nruj dua PSL2 (Product Specification Level 2) tus qauv, qhov kev lees paub lub zog muaj zog yog feem ntau ntawm 485 MPa thiab 635 MPa-3.
2. Qhov muaj pes tsawg leeg ntawm X70 yog dab tsi?
API 5L X70 muaj cov tshuaj lom neeg tshwj xeeb uas tsim los rau lub zog siab thiab weldability. Cov kev txwv siab tshaj plaws rau cov ntsiab lus muaj xws li-4:
Cov pa roj carbon (C):Tsawg dua lossis sib npaug li 0.16%
Manganese (Mn):Tsawg dua lossis sib npaug li 1.70%
Silicon (Si):Tsawg dua lossis sib npaug li 0.45%
Phosphorus (P):Tsawg dua lossis sib npaug li 0.020%
Sulfur (S):Tsawg dua lossis sib npaug li 0.010%
Micro{0}} cov khoom sib xyawzoo li Vanadium (V), Niobium (Nb), thiab Titanium (Ti) kuj tseem tswj tau me me (piv txwv li, Tsawg dua lossis sib npaug li 0.06%) los txhim kho lub zog los ntawm cov nplej refinement-2-4.
3. Dab tsi yog API 5L yeeb nkab?
API 5L yog ib qho kev qhia tshwj xeeb tshaj tawm los ntawm American Petroleum Institute uas npog cov yeeb nkab steel siv rau kev thauj cov roj, roj av, thiab dej hauv cov kav dej-4-5. Nws yog tus qauv siv thoob ntiaj teb tshaj plaws rau kab yeeb nkab-3. Tus qauv txhais cov kev cai rau cov qib sib txawv (xws li X42, X65, X70), qhia lawv cov khoom siv kho tshuab, tshuaj muaj pes tsawg leeg, qhov ntev, thiab cov txheej txheem kuaj kom muaj kev nyab xeeb thiab kev ua haujlwm-9-10.
4. Qhov twg zoo dua X50 lossis X70?
"Zoo dua" nyob ntawm daim ntawv thov yuav tsum tau ua.X70 muaj zog duali x50. Qhov tsawg kawg nkaus tawm lub zog rau X50 yog kwv yees li 50,000 psi (345 MPa), thaum X70's yog 70,000 psi (485 MPa)-1-9. Siv X70 tso cai rau kev siv cov phab ntsa ntawm cov yeeb nkab thinner kom tiv taus tib lub siab, uas tuaj yeem txo cov khoom siv thiab cov nqi thauj mus los rau kev kub siab, cov kav dej ntev. Txawm li cas los xij, qib siab zog zoo li X70 tuaj yeem nthuav tawm cov kev cov nyom ntau dua hauv kev vuam thiab tej zaum yuav muaj qhov sib txawv ntawm kev sib tsoo ib puag ncig-6-9. X50 tej zaum yuav zoo dua rau cov ntawv thov tsawg dua lossis qhov tshwj xeeb weldability xav tau.
5. Dab tsi ntu yog X70?
API 5L X70 yog cais raws li asiab- zog, qis- hlau alloy (HSLA) steel. Hauv API 5L qib series, uas suav nrog qib B, X42, X52, X60, X65, X70, X80, thiab dhau mus, X70 poob rau hauvsiab - pawg muaj zogthiab feem ntau yog siv rau kev xav tau onshore thiab offshore kis tau tus mob pipelines-3-5.
