A106 Qib C yog dab tsi?
ASTM A106 npog seamless carbon steel yeeb nkab rau siab - kub kev pab cuam nyob rau hauv peb qib. Qib C yog qhov muaj zog tshaj plaws, nrog lub zog tensile yam tsawg kawg nkaus ntawm 485 MPa thiab qhov tsawg kawg nkaus yield zog ntawm 275 MPa, ua tiav nrog cov ntsiab lus siab tshaj plaws ntawm 0.35 feem pua.
Qib C tau teev tseg thaum tsim lub siab thiab txoj kab uas hla xav tau lub zog ntau dua li Qib B tuaj yeem muab tau ntawm cov phab ntsa uas pheej yig, tshwj xeeb tshaj yog nyob rau hauv siab -siab chav thiab txheej txheem txheej txheem.
Chemical thiab Mechanical Properties
| Khoom | Qib C yuav tsum tau |
|---|---|
| Tensile zog, min | 485 MPa (70,000 psi) |
| Yield zog, min | 275 MPa (40,000 psi) |
| Cov pa roj carbon, max | 0.35% |
| Manganese | 0.29-1.06% |
| Phosphorus, max | 0.035% |
| Sulfur, max | 0.035% |
Cov ntsiab lus carbon ntau dua ntawm Qib C nce lub zog thiab hardenability, uas txhim kho lub peev xwm thauj khoom tab sis txo cov weldability thiab ua rau muaj kev pheej hmoo ntawm kev nyuaj siab dhau ntawm thaj chaw tshav kub.
Hardness thiab Sour Service Risk
Qib C tuaj yeem ncav cuag qhov tseem ceeb hardness siab dua 200 HB hauv qee qhov xwm txheej. Hauv cov kev pabcuam qaub uas muaj hydrogen sulfide, kev nyuaj siab ua rau muaj kev pheej hmoo ntawm sulfide kev ntxhov siab tawg, yog li Qib C yuav tsum tsis txhob siv rau hauv H2S ib puag ncig yam tsis muaj kev txheeb xyuas qhov nyuaj thiab kev tsim nyog. Kev ntsuam xyuas hardness ntawm daim ntawv pov thawj zeb yog qhov tseem ceeb soj ntsuam rau qib no.
Daim ntawv thov
Qib C yeeb nkab yog siv rau hauv siab - cov kab hluav taws xob siab, boiler feedwater systems, siab - cov txheej txheem siab piping thiab lwm yam kev pabcuam uas lub zog ntawm Qib B tsis txaus. Nws tseem raug xaiv rau cov ntawv tuab- phab ntsa uas lub zog ntxiv txo cov phab ntsa tuab thiab qhov hnyav.
Kev txiav txim siab vuam
Vuam Qib C xav tau kev saib xyuas ntau dua li Qib B. Preheating yog pom zoo rau cov ntu tuab, qis -hydrogen electrodes yog nyiam, thiab tom qab-weld heat treatment tej zaum yuav xav tau rau kev pabcuam hnyav lossis phab ntsa hnyav. Cov txheej txheem vuam yuav tsum tsim nyog rau qhov tshwj xeeb thickness ntau.
FAQ
Q1. Dab tsi yog lub zog tawm los ntawm A106 Gr. C?
Qhov tsawg kawg nkaus tawm lub zog yog 275 MPa, sib npaug rau 40,000 psi, qhov siab tshaj plaws ntawm peb qib A106.
Q2. Thaum twg Qib C yuav tsum tau teev tseg?
Thaum tsim lub siab thiab txoj kab uas hla yuav tsum muaj kev ntxhov siab ntau dua li Qib B, tso cai rau cov phab ntsa nyias thiab cov kav dej sib zog.
Q3. Qib C puas haum rau kev pabcuam qaub?
Tsis yog tsis muaj pov thawj. Cov ntsiab lus carbon ntau dua tuaj yeem tsim qhov nyuaj tshaj qhov txwv tsis pub muaj kev nyab xeeb rau H2S kev pabcuam, yog li kev tswj hwm thiab kev sim yog qhov tseem ceeb.
Q4. Qib C vuam piv nrog Qib B li cas?
Qib C xav tau kev saib xyuas ntau dua: preheat rau qhov hnyav dua, qis -hydrogen consumables thiab tejzaum nws post-weld heat treatment los tswj hardness.
Q5. Qhov kev pabcuam siab tshaj plaws ntawm Qib C yog dab tsi?
Ib yam li lwm cov qib A106, Qib C tsuas yog muaj txog 425 degrees C rau kev pabcuam txuas ntxiv, saum toj no uas nkag mus tswj hwm tsim.
Q6. Daim ntawv pov thawj zeb qhia dab tsi rau Qib C?
Daim ntawv pov thawj yuav tsum qhia tensile thiab yield tau, tshuaj ntsuam xyuas, hydrostatic test cov ntaub ntawv thiab hardness qhov tseem ceeb uas tau teev tseg, paub meej tias qib raws li A106 yuav tsum.
