ASTM A556 cov yeeb nkab steel feem ntau yog siv los ua cov yeeb nkab carbon steel txias-kos seamless rau cov cua sov tubular feedwater.
Nws qhov ntau thiab tsawg ntawm daim ntawv thov yog cov yeeb nkab hlau tsis muaj seamless nrog sab nraud txoj kab uas hla ntawm 15.9-31.8mm thiab phab ntsa tuab tsis tsawg dua 1.1mm.
Tsab xov xwm no tsom mus rau cov yeeb nkab hlau thiab tsis suav nrog cov raj U-tubes uas tau hais hauv tus qauv.
Txoj kab uas hla sab nraud: 5/8 - 1 1/4 nti [15.9 -31.8 hli].
Phab ntsa tuab: ≥ 0.045 nti [1.1 hli].
ASTM A556 faib peb qib,Qib A2, Qib B2, thiabQib C2.
Cov kav hlau yuav tsum tau tsim los ntawm ib qhotsis muaj qhov tsis sib xwscov txheej txheem thiab yuav tsum tau kos txias.
Cov kav hlau tsis muaj qhov txias uas rub tawm muaj qhov tseeb ntawm qhov ntev thiab qhov ua tiav zoo thaum txhim kho cov qauv me me thiab txhim kho nws cov khoom siv kho tshuab xws li lub zog thiab qhov nyuaj. Cov qauv tsis muaj qhov tsis sib xws ua rau cov kav hlau ruaj khov dua thiab muaj kev nyab xeeb thaum raug kev kub siab thiab kub, ua rau lawv haum rau cov ntawv thov kev lag luam uas xav tau kev ua haujlwm siab thiab kev ua tau zoo.
Txawm li cas los xij, cov kav hlau tsis muaj qhov txias uas rub tawm kim dua los tsim vim tias lawv cov txheej txheem tsim khoom nyuaj dua thiab xav tau kev ua haujlwm thiab cov khoom siv ntau dua. Tsis tas li ntawd, lawv cov txiaj ntsig tsim khoom qis, tshwj xeeb tshaj yog hauv kev tsim khoom ntau, tsis pheej yig npaum li cov txheej txheem dov kub, thiab qee zaum yuav muaj kev poob khoom ntau dua, txwv lawv siv rau hauv qee qhov kev siv.
Cov raj xa dej txias yuav tsum tau kho cua sov tom qab qhov kawg txias-kos dhau ntawm qhov kub ntawm 1200 ° F [640 ° C] lossis siab dua kom ntseeg tau tias ductility txaus siab rau dov rau hauv cov ntawv raj thiab kom ua tau raws li cov khoom siv kho tshuab raws li tau teev tseg.
Yog tias kev tshuaj xyuas khoom raug ua tiav, saib ASTM A751 rau cov txheej txheem sim.
1. Khoom Siv Tensile
Txoj kev sim: ASTM A450 Ntu 7.
Rau cov pawg txog li 50 lub raj, yuav tsum xaiv 1 lub raj rau kev sim.
Rau cov pawg ntau dua 50 lub raj, yuav tsum xaiv 2 lub raj rau kev sim.
2. Qhov nyuaj
Txoj kev sim: ASTM A450 Tshooj 23.
Cov qauv los ntawm ob lub raj kuaj los ntawm txhua pawg yuav tsum tau kuaj xyuas Brinell lossis Rockwell hardness.
Qhov Rockwell hardness ntawm cov yeeb nkab yuav tsum tsis pub tshaj qhov tau qhia hauv lub rooj.
| Qib | Qhov nyuaj |
| Qib A2 | 72 HRBW |
| Qib B2 | 79 HRBW |
| Qib C2 | 89 HRBW |
3. Kev Ntsuas Kom Sib Nqus
Txoj kev sim: ASTM A450 Ntu 19.
Yuav tsum tau ua qhov kev sim ua kom tiaj tiaj rau ib qho qauv ntawm txhua qhov kawg ntawm lub raj hlau tiav lawm los ntawm kev xaiv tsis pub ntau tshaj 125 lub raj los ntawm txhua qhov ntau.
4. Kev Ntsuas Kub
Txoj kev sim: ASTM A450 Ntu 21.
Kev ntsuam xyuas flaring yuav tsum tau ua rau ib qho qauv ntawm txhua qhov kawg ntawm lub raj tiav lawm, nrog rau tsis pub ntau tshaj 125 lub raj xaiv los ntawm txhua pawg.
Tsis muaj kev sim hydrostatic uas yuav tsum tau ua rau cov kav hlau.
Txawm li cas los xij, txhua lub yeeb nkab U yuav tsum tau kuaj hydrostatically nrog cov kua dej uas tsis yog corrosive.
Txhua lub raj yuav tsum raug kuaj los ntawm cov cuab yeej ntsuas uas tsis ua rau puas tsuaj uas muaj peev xwm nrhiav tau qhov tsis zoo hauv tag nrho qhov seem ntawm lub raj tom qab kev kho cua sov saum npoo av tom qab kos duab txias kawg.
Cov txheej txheem sim tsis puas tsuaj ntawm SpecificationE213, Cov Lus Qhia Tshwj XeebE309(rau cov ntaub ntawv ferromagnetic), Cov Lus Qhia Tshwj XeebE426(rau cov ntaub ntawv uas tsis yog hlau nplaum), lossis Cov Lus Qhia Tshwj XeebE570tej zaum yuav raug xaiv rau qhov kev xeem.
Cov kev kam rau siab hauv qab no tsis siv rau qhov khoov ntawm U-tube.
Cov yeeb nkab tiav lawm yuav tsum tsis muaj nplai tab sis tej zaum yuav muaj zaj duab xis oxide saum npoo.
Cov raj uas ua tiav lawm yuav tsum ncaj thiab du thiab tsis muaj burrs. Cov raj yuav tsum zoo li tus neeg ua haujlwm thiab yuav tsum tsis muaj qhov tsis zoo ntawm qhov chaw uas tsis tuaj yeem tshem tawm hauv qhov kev kam rau siab ntawm phab ntsa.
Yuav tsis tas yuav tshem tawm cov qhov tsis zoo ntawm qhov chaw xws li cov cim tuav, cov cim ncaj, cov cim mandrel thiab cov cim pwm, cov qhov ntiav, thiab cov qauv nplai yog tias lawv nyob hauv qhov kev kam rau siab ntawm phab ntsa.
Cov kab uas hla sab hauv thiab sab nraud ntawm cov yeeb nkab tiav lawm yuav tsum tau coated kom tiv thaiv kev xeb thaum lub sijhawm thauj mus los.
Cov txheej txheem feem ntau yogcov roj tiv thaiv xeb, cov xim pleev xim, los yogcov xim pleev xim.
Qhov kev xaiv cov khoom siv txheej feem ntau nyob ntawm qhov xav tau ntawm daim ntawv thov ntawm cov yeeb nkab hlau, qhov chaw siv, thiab lub sijhawm tiv thaiv.
Cov cua sov dej tubularQhov no yog ib qho ntawm cov ntawv thov feem ntau rau ASTM A556 steel tubing.
Hauv kev lag luam fais fab, cov cua sov dej pub siv los ua kom cov dej pub boiler sov ua ntej, feem ntau yog los ntawm kev rho cov pa tawm. Kev siv cov yeeb nkab hlau no ua rau muaj kev hloov pauv ntawm lub zog thermal, txhim kho kev siv hluav taws xob tag nrho thiab kev ua haujlwm ntawm lub kaw lus.
Cov khoom siv hloov cua sov thiab cov condenserVim nws cov khoom siv hloov pauv cua sov zoo heev thiab tiv taus corrosion, ASTM A556 steel tubing kuj tseem siv tau rau lwm hom kev hloov pauv cua sov thiab condenser, uas siv rau hauv ntau yam tshuaj lom neeg, petrochemical, thiab lwm yam txheej txheem kev lag luam.
Cov tshuab ua pa siab: Qhov kub thiab txias siab ntawm ASTM A556 tubing ua rau nws tsim nyog siv rau hauv cov tshuab ua pa siab thiab lwm yam kev siv uas xav tau kev kub siab thiab kub heev.
ASTM A179/A179M- Qhov no yog tus qauv rau cov khoom siv hloov pauv cua sov carbon steel txias thiab cov raj condenser rau kev pabcuam cryogenic.
ASTM A192/A192M- Qhia meej txog cov kev cai rau cov kav dej boiler carbon steel seamless rau cov boilers siv rau hauv kev pabcuam siab.
ASTM A210/A210M- Tus qauv rau cov raj xa dej carbon nruab nrab thiab carbon-manganese steel seamless rau cov boilers thiab superheaters.
ASTM A213/A213M- Muab cov qauv rau cov seamless ferritic thiab austenitic alloy steel boiler, superheater, thiab cov raj xa cua sov.
ASTM A249/A249M- Tus qauv siv tau rau cov hlau austenitic welded boiler, superheater, heat exchanger, thiab condenser tubes.
ASTM A334/A334M- Tus qauv rau cov yeeb nkab carbon thiab alloy steel uas tsis muaj qhov sib txuas thiab vuam rau kev pabcuam cryogenic.
Txhua tus qauv no suav nrog cov kav hlau siv rau hauv cov khoom hloov cua sov, cov boilers lossis cov ntawv thov zoo sib xws. Tus qauv twg yuav xaiv nyob ntawm qhov yuav tsum tau ua ntawm daim ntawv thov, xws li qhov kub thiab txias ua haujlwm, qhov ntsuas siab, thiab kev tiv taus xeb.
Txij li thaum nws tau tsim tsa xyoo 2014, Botop Steel tau dhau los ua tus thawj coj ntawm cov yeeb nkab carbon steel hauv Northern China, paub txog kev pabcuam zoo heev, cov khoom lag luam zoo, thiab cov kev daws teeb meem dav dav.
Lub tuam txhab muaj ntau yam yeeb nkab hlau carbon thiab cov khoom lag luam cuam tshuam, suav nrog cov yeeb nkab hlau seamless, ERW, LSAW, thiab SSAW, nrog rau cov khoom siv yeeb nkab thiab cov 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 haujlwm yeeb nkab.
