ASTM A334Qib 1yog ib lub yeeb nkab carbon steel seamless thiab welded rau kev pabcuam qis-kub.
Nws muaj cov pa roj carbon ntau tshaj plaws ntawm 0.30%, cov manganese ntsiab lus ntawm 0.40-1.60%, lub zog tensile tsawg kawg nkaus ntawm 380Mpa (55ksi), thiab lub zog tawm los ntawm 205Mpa (30ksi).
Nws yog siv rau kev thauj mus los kua dej hauv qhov chaw kub qis, cov khoom siv tub yees, thiab lwm yam kev siv hauv kev lag luam uas xav tau kev tiv thaiv kev cuam tshuam kub qis.
ASTM A334 muaj ntau qib los daws teeb meem nrog ntau qhov chaw kub qis, uas yog:Qib 1, Qib 3, Qib 6, Qib 7, Qib 8, Qib 9, thiab Qib 11.
Muaj ob hom hlau, carbon hlau thiab alloy hlau.
Qib 1thiabQib 6ob yog cov hlau carbon.
Lawv tuaj yeem tsim los ntawmcov txheej txheem seamless lossis welded.
Hauv kev tsim cov kav hlau tsis muaj seamless, muaj ob txoj kev tsim khoom,Kub-tiav los yog Txias-kos.
Qhov kev xaiv nyob ntawm seb siv cov yeeb nkab kawg li cas, qhov loj ntawm cov yeeb nkab, thiab cov kev cai tshwj xeeb rau cov khoom siv.
Hauv qab no yog daim duab qhia txog cov txheej txheem tsim khoom kub-ua tiav seamless.
Lubkub tiavCov txheej txheem yeeb nkab seamless suav nrog kev ua kom sov cov hlau billet rau qhov kub siab thiab tom qab ntawd tsim cov yeeb nkab los ntawm kev dov lossis extruding. Cov txheej txheem no tshwm sim ntawm qhov kub siab thiab pab txhim kho cov qauv me me ntawm cov khoom siv, yog li ua rau nws cov tawv thiab sib xws.
Cov txheej txheem kub tiav yog qhov tsim nyog rau kev tsim cov raj loj thiab cov phab ntsa tuab, feem ntau siv rau hauv cov kav dej thauj mus los thiab cov ntawv thov kev tsim kho, thiab nws tsim nyog rau kev tsim khoom ntau vim nws tus nqi qis.
Txias-kosCov raj hlau tsis muaj seamless raug ua los ntawm kev ncab tom qab cov khoom tau txias tag kom ua tiav qhov loj me thiab cov duab raws li qhov xav tau. Txoj kev no txhim kho qhov tseeb ntawm qhov ntev thiab qhov tiav ntawm cov khoom, thaum qhov ua haujlwm txias-ua kom tawv kuj txhim kho cov khoom siv kho tshuab ntawm lub raj, xws li lub zog thiab kev tiv thaiv kev hnav.
Cov txheej txheem kos duab txias yog qhov tshwj xeeb tshaj yog rau kev tsim cov raj nrog cov txoj kab uas hla me me thiab cov phab ntsa nyias nyias qhov twg xav tau qhov tseeb siab thiab qhov zoo ntawm qhov chaw thiab siv dav hauv cov chaw xws li cov tshuab hydraulic, cov khoom siv tsheb, thiab cov khoom siv siab kom tau raws li cov kev xav tau tshwj xeeb, txawm tias tus nqi siab dua.
Ua kom zoo li qub los ntawm kev ua kom sov mus rau qhov kub thiab txias tsis pub tsawg dua 1550 ° F [845 ° C] thiab txias hauv huab cua lossis hauv chav txias ntawm lub cub tawg uas tswj hwm huab cua.
Yog tias xav tau kev kho kom sov, nws yuav tsum tau sib tham.
Rau cov qib saum toj no ntawm cov kav hlau tsis muaj seamless xwb:
Rov ua kom sov thiab tswj kev ua haujlwm kub thiab qhov kub ntawm kev ua haujlwm kub-ua tiav mus rau qhov kub tiav ntawm 1550 - 1750 °F [845 - 955 ℃] thiab txias hauv lub cub tawg tswj tau los ntawm qhov kub pib tsis tsawg dua 1550 °F [845 °C].
Qib 1 chemistry yog tsim los kom muaj kev sib npaug ntawm lub zog, qhov nyuaj, thiab qhov kub qis rau cov ntawv thov hauv qhov chaw kub qis.
| Qib | C(Cov pa roj carbon) | Mn(Manganese) | P(Phosphorus) | S(Xim av) |
| Qib 1 | siab tshaj 0.30% | 0.40-1.06% | siab tshaj plaws 0.025% | siab tshaj plaws 0.025% |
| Rau txhua qhov kev txo qis ntawm 0.01% carbon hauv qab 0.30%, kev nce ntawm 0.05% manganese saum 1.06% yuav raug tso cai rau qhov siab tshaj plaws ntawm 1.35% manganese. | ||||
Cov pa roj carbon yog lub ntsiab lus tseem ceeb uas ua rau lub zog thiab qhov nyuaj ntawm cov hlau nce ntxiv, tab sis nyob rau hauv cov ntawv thov kub qis, cov pa roj carbon ntau tuaj yeem txo qhov tawv ntawm cov khoom.
Qib 1, nrog cov ntsiab lus carbon siab tshaj plaws ntawm 0.30%, yog cais ua cov hlau qis-carbon thiab raug tswj hwm ntawm qib qis kom ua kom zoo dua nws cov tawv nqaij qis-kub.
Cov nqi elongation tsawg kawg nkaus suav rau txhua 1/32 nti.[0.80 hli] txo qis hauv phab ntsa tuab.
Kev sim cuam tshuam rau cov kav hlau Qib 1 tau ua tiavntawm -45°C [-50°F], uas yog tsim los xyuas qhov tawv thiab kev cuam tshuam ntawm cov khoom siv hauv qhov chaw kub qis heev. Qhov kev sim yog ua los ntawm kev xaiv lub zog cuam tshuam tsim nyog raws li phab ntsa tuab ntawm cov yeeb nkab hlau.
Cov qauv cuam tshuam uas muaj qhov nkhaus yuav tsum yog ntawm lub nqaj yooj yim, Charpy-hom, raws li Cov Txheej Txheem Xeem E23. Hom A, nrog V notch.
Ob txoj kev ntsuas qhov nyuaj uas siv ntau yog kev ntsuas Rockwell thiab Brinell hardness.
| Qib | Rockwell | Brinell |
| ASTM A334 Qib 1 | B 85 | 163 |
Txhua lub yeeb nkab yuav tsum raug kuaj xyuas tsis muaj kev puas tsuaj los ntawm hluav taws xob lossis hydrostatically raws li STM A1016/A1016M. Tshwj tsis yog tias tau teev tseg lwm yam hauv daim ntawv xaj yuav khoom, hom kev kuaj uas yuav siv yuav yog nyob ntawm tus neeg tsim khoom xaiv.
Ntxiv rau cov cim qhia hauv Specification A1016/A1016M, cov cim yuav tsum suav nrog kub tiav, txias kos, seamless, lossis welded, thiab cov ntawv "LT" ua raws li qhov kub uas qhov kev sim cuam tshuam tau ua tiav.
Thaum cov yeeb nkab hlau tiav lawm tsis loj txaus kom tau txais cov qauv me me, qhov cim yuav tsum tsis txhob muaj cov ntawv LT thiab qhov kub thiab txias uas tau qhia.
Siv dav hauv ntau yam kev siv hauv kev lag luam uas xav tau kev ua haujlwm kub tsawg.
Kev thauj mus los ntawm cov kua dej cryogenicCov yeeb nkab hlau qib 1 siv dav los thauj cov kua dej cryogenic xws li cov roj av liquefied (LNG), cov roj av liquefied (LPG), thiab lwm yam tshuaj cryogenic. Cov kua dej no feem ntau yuav tsum tau thauj mus rau qhov chaw nyab xeeb ntawm qhov kub qis dua ambient, thiab cov yeeb nkab hlau qib 1 tswj nws cov khoom siv lub cev thiab kev ua haujlwm ntawm qhov kub qis no.
Cov tshuab thiab cov khoom siv tub yees: Feem ntau siv rau cov kav dej xa dej txias hauv cov kab ke no.
Cov khoom siv hloov cua sov thiab cov condenserCov khoom siv hloov cua sov thiab cov condenser yog cov khoom tseem ceeb hauv kev lag luam thiab lub zog, feem ntau siv cov yeeb nkab hlau Qib 1 ua cov khoom siv hauv tsev. Cov khoom siv no xav tau cov ntaub ntawv uas tswj tau lub zog siab thiab tiv taus xeb ntawm qhov kub qis kom ntseeg tau tias kev ua haujlwm ntev thiab kev ua haujlwm zoo.
Cov chaw cia khoom txias thiab cov chaw ua kom txiasHauv kev khaws cia txias thiab lwm qhov chaw tub yees, cov kav dej yuav tsum tau hloov kho rau qhov kub qis heev. Cov kav hlau qib 1 tuaj yeem siv los tsim cov kav dej hauv cov chaw no vim nws muaj peev xwm txuas ntxiv ua haujlwm hauv qhov chaw txias yam tsis muaj kev puas tsuaj.
1. EN 10216-4: P215NL, P255QL;
2. DIN 17173:TTSt35N;
3. JIS G3460: STPL 380;
4. GB/T 18984: 09Mn2V.
Cov qauv thiab qib no yog tsim los kom muaj cov khoom zoo sib xws lossis sib npaug rau ASTM A334 Qib 1, xav txog cov khoom kub qis thiab lwm yam kev ua tau zoo.
Txij li thaum nws tau tsim tsa xyoo 2014, Botop Steel tau dhau los ua tus thawj coj ntawm cov yeeb nkab hlau carbon hauv Sab Qaum Teb Suav teb, paub txog kev pabcuam zoo heev, cov khoom lag luam zoo, thiab cov kev daws teeb meem dav dav. Lub tuam txhab muab ntau yam yeeb nkab hlau carbon thiab cov khoom lag luam cuam tshuam, suav nrog cov yeeb nkab hlau tsis muaj qhov txuas, ERW, LSAW, thiab SSAW, nrog rau cov khoom siv yeeb nkab thiab flanges tiav.
Nws cov khoom tshwj xeeb kuj suav nrog cov hlau alloys zoo thiab cov hlau stainless austenitic, tsim los ua kom tau raws li qhov xav tau ntawm ntau yam dej num pipeline.
