ASTM A179 Boiler Tube yog dab tsi
ASTM A179 npog seamless txias-tso qis- cov pa roj carbon steel raj tsim rau cov khoom siv hluav taws xob hloov pauv xws li cov khoom siv hluav taws xob sib hloov, condensers thiab cov kev pabcuam zoo sib xws. Nyob rau hauv cov txheej txheem American, A179 yog lub hauv paus qis- qib carbon: cov hlau raug tua tag nrho, lub raj yog txias los ntawm qhov loj thiab tom qab ntawd kho cua sov, yog li cov khoom tiav ua ke nrog kev ua haujlwm zoo nrog cov khoom siv txhim khu kev qha rau siab - kev pabcuam nruj.
A179 cov hlab yog muab rau hauv cov kab me me nrog cov phab ntsa nyias, uas ua rau lawv tsim nyog rau cov hlab ntim uas muaj ntau pua lub raj dhau los ntawm ib lub raj raj. Txoj kev txias -txoj kev kos muab qhov tseeb qhov tseeb, qhov chaw tiav thiab qhov sib npaug uas cov pob khoom no xav tau.
Dimensional thiab Surface yam ntxwv
| Yam khoom | Yam ntxwv |
|---|---|
| Txoj kev tsim khoom | Cold drawn seamless, qis carbon, siab tua steel |
| Sab nraud txoj kab uas hla | 3.2mm txog 76.2mm |
| Phab ntsa thickness precision | Mus txog 0.1 mm |
| Sab hauv thiab sab nrauv | Oxide-dawb, siab nto tiav |
| Kev coj cwj pwm | Leak- pov thawj, siab ua haujlwm siab |
| Tsim tus cwj pwm | Tsis muaj deformation thaum khoov txias, tsis muaj cracking thaum flaring lossis flattening |
Cov oxide-dawb nto teeb meem nyob rau hauv condenser thiab tshav kub exchanger kev pab cuam vim scale los yog oxide nyob rau hauv lub puab phab ntsa txo cov cua sov hloov thiab tuaj yeem ua raws li qhov chaw nucleation rau deposits. Kev ua tiav sab hauv siab kuj tseem tso cai rau eddy tam sim no thiab kev ntsuas hydraulic kom ua tiav nrog kev nkag siab zoo ib yam, thiab nws txo qis lub siab poob hla lub raj ntev.
Chemical thiab Mechanical Requirements
| Khoom | Kev xav tau rau qis -carbon A179 / A192 raj |
|---|---|
| Cov pa roj carbon, C (%) | 0.06-0.18 Nws |
| Manganese, Mn (%) | 0.27-0.63 Nws |
| Phosphorus, P (%) | 0.035 max |
| Sulfur, S (%) | 0.035 max |
| Silicon, Si (%) | 0.25 max |
| Tensile zog | 325 MPa yam tsawg kawg nkaus |
| Yield zog | 180 MPa yam tsawg kawg nkaus |
| Elongation | 35% yam tsawg kawg nkaus |
Cov pa roj carbon tsawg ua kom cov hlau mos txaus rau dov, khoov thiab nthuav dav rau hauv cov ntaub ntawv, thaum cov tshuaj manganese tswj tau muab lub zog xav tau rau sab hauv siab. Phosphorus thiab sulfur yog tuav ntawm cov seem uas tsis tshua muaj kom lub raj khaws cov ductility thiab tiv thaiv kom tawg thaum lub caij txias ua haujlwm.
Specification Options Muab nrog Txhua Order
Standard thiab qib:ASTM A179 seamless boiler raj, txias kos.
Xaus:square los yog tiaj kawg (ncaj txiav, saw txiav, taws txiav) thiab beveled los yog threaded xaus.
Delivery condition:annealed, normalized los yog tempered, raws li daim duab los yog kev yuav khoom specification.
Kev kho deg:oiled, dub pleev xim rau, tua blasted los yog kub dipped galvanized.
Ntim:pob los yog tej, rooj ntoo, los yog lwm yam seaworthy packing pom zoo rau cov khoom xa tuaj.
Kev xa khoom thiab kev kho saum npoo feem ntau tau teev tseg ua ke, vim hais tias lub raj zoo li qub lossis annealed uas tom qab khoov lossis nthuav dav coj txawv ntawm lub raj xa hauv raws li -txoj kev mob. Galvanized lossis pleev xim rau cov raj feem ntau xaiv thaum sab nraud ntawm lub raj raug rau huab cua es tsis yog rau lub plhaub - sab dej.
Qhov twg siv A179 Tube
Plhaub thiab raj kub exchangers:lub raj sab yog nqa dej txias los yog cov kua dej thaum lub plhaub sab nqa cov cua sov nruab nrab.
Condenser:steam condensers nyob rau hauv lub hwj chim thiab txheej txheem cov nroj tsuag, qhov twg nyias phab ntsa muab siab kub hloov mus rau ib chav tsev ntev.
Feedwater heaters thiab coolers:Cov khoom siv hluav taws xob hloov hluav taws xob hauv boiler circuits.
Tsawg-siab boiler Cheebtsam:economiser thiab cua rhaub tube bundles qhov twg tsawg - carbon steel tau txais.
General heat transfer equipment:ib daim ntawv thov uas yuav tsum tau muaj cov kav dej, qhov tseeb qhov qis qis - carbon tube.
A179 yog qib qis-carbon, qis- qib zog, yog li nws raug xaiv qhov twg corrosion thiab kub yog nruab nrab. Rau qhov kub thiab txias kev pab cuam, qib siab dua yog siv; Qhov kom zoo dua ntawm A179 nyob rau hauv nws formability, nws qhov tseeb qhov ntev thiab nws cov kev ua tau zoo ib yam nyob rau hauv cov hlab loj.
Kev tshuaj xyuas thiab tuav
Vim tias A179 raj feem ntau yog khoov thiab nthuav dav ntawm qhov chaw, kev tshuaj xyuas tsom rau cov khoom uas cuam tshuam rau kev tsim: phab ntsa thickness uniformity, kev ywj pheej ntawm laps, seams thiab decarburization ntau dhau, thiab sab hauv sab hauv tsis muaj oxide thiab teeb meem scale. Cov raj feem ntau muaj kev tiv thaiv thaum thauj nrog lub kaus mom kawg lossis cov rooj ntoo ntoo, thiab cov khoom ntim tau muab khaws cia hauv qab npog kom qhov chaw tiav yog khaws cia kom txog thaum kev teeb tsa.
FAQ
Q: ASTM A179 boiler raj siv rau dab tsi?
A179 txias-kos qis- cov pa roj carbon seamless raj yog siv rau cov khoom siv hluav taws xob hloov pauv xws li cov khoom siv hluav taws xob, cov condensers, cov cua txias thiab cov siab zoo sib xws- nruj kev pabcuam.
Q: Dab tsi ntawm txoj kab uas hla yog muaj?
Cov txheej txheem ntau lawm sau los ntawm 3.2 hli mus rau 76.2 hli sab nraud txoj kab uas hla, nrog rau phab ntsa thickness kam rau ua kom txog rau ntxiv los yog rho tawm 0.1 hli.
Q: A179 raj xa tuaj li cas?
Cov raj yog muab annealed, normalized los yog tempered, nrog oiled, dub pleev xim rau, tua blasted los yog kub dipped galvanized nto, thiab nrog dawb, beveled los yog threaded kawg.
Q: Vim li cas qhov txias - kos nto tseem ceeb?
Kev kos duab txias ua rau oxide-dawb, siab- ua kom tiav nto nrog qhov tseeb qhov ntev, uas txhim kho cov cua sov hloov mus, ua kom lub siab poob qis thiab txhawb kev ntseeg siab tsis yog- kuaj kev puas tsuaj.
Q: Lub raj A179 puas tuaj yeem khoov thiab nthuav dav?
Yog lawm. Qhov qis - carbon chemistry muab cov ductility xav tau rau kev khoov txias yam tsis muaj deformation, thiab rau flaring lossis flattening tsis tawg.
Q: Yuav ua li cas A179 raj yuav khaws cia ua ntej kev teeb tsa?
Khaws cov bundles hauv qab npog nrog qhov kawg tiv thaiv nyob rau hauv qhov chaw, kom cov nto tiav thiab qhov tseeb qhov tseeb ntawm lub raj kawg yog khaws cia kom txog rau thaum lub nras raug ntsia.