ASTM A179 Seamless Steel Tubes piav qhia
ASTM A179 / ASME A179 tus qauv siv rau seamless, txias -tso qis- carbon steel tubing rau cov cua kub exchangers thiab condensers. Cov raj no muaj cov phab ntsa me me thiab tshwj xeeb tshaj yog tsim rau tubular heat exchangers, condensers, thiab cov khoom siv hluav taws xob zoo sib xws. ASTM A179 / ASME A179 tus qauv qhia cov txheej txheem sab nraud xws li 1/8 nti txog 3 ntiv tes (xws li, 3.2 txog 76.2 hli).
Cov Khoom Siv Tshuaj Rau ASTM A179 Seamless Tubes
| C, % | Mn,% | P, % | S, % |
| 0.06-0.18 | 0.27-0.63 | 0.035 max | 0.035 max |
Mechanical Requirements rau ASTM A179 Seamless Tubes
| Tensile zog, MPa | Yield zog, MPa | Elongation,% | Hardness, HRB |
| 325 min | 180 feeb | 35 feeb | 72 max ua |
Daim ntawv thov
1. Cov khoom siv cua sov
Boiler Economizers:
Siv nyob rau hauv fais fab nroj tsuag boilers kom rov qab pov tseg tshav kub los ntawm flue gas, preheating feedwater ua ntej nws nkag mus rau hauv lub boiler nruas.
A179 cov kav dej 'qhov siab qhov tseeb ua kom nruj ntim hauv cov khoom siv nyiaj txiag, ua kom muaj cua sov los ntawm cov pa roj flue.
Lawv cov ntsiab lus tsis tshua muaj carbon tsawg thiab zoo heev toughness tiv thaiv nkig tsis ua hauj lwm nyob rau hauv thermal cycling (rov ua cua sov thiab txias).
Condenser:
Pom muaj nyob rau hauv cov chaw tsim hluav taws xob thiab cov chaw tsim khoom, qhov chaw uas lawv tso cov pa tawm ntawm cov turbines rov qab rau hauv dej rau rov siv dua.
Qhov chaw du ntawm A179 cov kav dej txhim kho kev hloov pauv hluav taws xob los ntawm kev txo qis fouling (scale lossis deposit buildup), uas tuaj yeem thaiv lub raj thiab txo kev ua haujlwm.
Lawv muaj peev xwm tiv taus qhov qis- qhov kub thiab txias ua kom ntseeg tau tias kev ua haujlwm ruaj khov txawm tias cov cua txias ntawm qhov ze ntawm - qhov kub thiab txias.
Evaporators thiab Kub Exchangers:
Siv rau hauv kev ua tshuaj lom neeg, tub yees, thiab HVAC tshuab kom hloov cov cua sov ntawm cov kua dej (xws li, kua rau vapor theem hloov).
Qhov txias- txheej txheem kos tau muab A179 cov kav dej zoo tshaj qhov ncaj thiab qhov sib npaug, tso cai rau cov raj ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom txheej txheej txheej txheej txheej txheej txheej A179 cov kav dej ua kom zoo dua qhov ncaj thiab roundness
2. Muaj Cua Txias Systems
Txheej txheem txias:
Hauv kev lag luam xws li petrochemicals, kws tshuaj, thiab kev ua zaub mov, A179 cov kav dej yog siv rau hauv cov tshuab cua txias uas tswj tau qhov kub thiab txias rau cov tshuaj tiv thaiv lossis cov khoom zoo.
Lawv qhov ntev ntev kom ntseeg tau tias muaj kev sib raug zoo nrog cov khoom siv thiab kev txhawb nqa, thaum lawv qhov chaw huv si tiv thaiv kev sib kis ntawm cov txheej txheem rhiab heev.
Cua txias thiab tub yees:
Ua hauj lwm hauv chillers thiab condensers ntawm loj -scale HVAC systems, qhov uas lawv tuav cov tub yees ntawm qhov kub thiab txias.
Cov kav dej tsis muaj cov ntsiab lus carbon tsawg thiab tswj cov impurities (piv txwv li, sulfur, phosphorus) txo qhov kev pheej hmoo ntawm kev ntxhov siab corrosion cracking, ib qho teeb meem tshwm sim hauv cov tub yees ib puag ncig.
3. Tsawg-Kev Pabcuam Kub (Tsis yog-Hom)
Thaum tsis ntsuas qhov kub thiab txias (piv txwv li, kua nitrogen ntawm -196 degree), A179 cov kav dej ua tau zoo nyob rau hauv cov ntawv thov uas qhov kub thiab txias me ntsis saum toj no khov los yog nyob rau theem ambient, xws li:
Chilled dej systems: Circulating dej txias rau 5-15℃rau lub tsev tswj kev nyab xeeb lossis cov txheej txheem kev lag luam.
Cov chaw cia txias: Cov kav dej hauv lub tub yees rau kev khaws khoom noj, qhov twg qhov kub ntawm 0℃txog 10 degree.
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