1. 20G yog dab tsi?
"20G" yog Suav qib kev xaiv rau carbon steel siv nyob rau hauv siab -siab boilers thiab siab hlab ntsha.
"20": Qhia txog kwv yees cov ntsiab lus carbon, uas yog kwv yees li 0.20%.
"G": Sawv rau "锅炉" (Guōlú), lo lus Suav rau "boiler".
Cov qib no yog cov khoom siv ntau tshaj plaws thiab cov khoom siv rau boiler raj hauv Suav teb thiab tau txais dav hauv cov haujlwm thoob ntiaj teb.
2. Kev Tswj Tus Txheej Txheem
Thawj tus qauv rau 20G boiler kav yog Suav Teb Chaws StandardGB/T 5310. Cov qauv no yog hu ua "Seamless steel tubes rau kev kub siab boiler". Nws qhia txog cov txheej txheem kev xa khoom rau cov kav dej seamless steel siv hauv kev tsim cov boilers rau siab - siab thiab siab - qhov kub thiab txias.
3. Tshuaj muaj pes tsawg leeg (ib GB/T 5310)
Cov tshuaj muaj pes tsawg leeg yog tswj nruj kom ntseeg tau tias weldability, lub zog, thiab kav ntev ntawm qhov kub thiab txias.
| Lub ntsiab | Cov ntsiab lus (%) |
|---|---|
| Cov pa roj carbon (C) | 0.17 ~ 0.23 |
| Silicon (Si) | 0.17 ~ 0.37 |
| Manganese (Mn) | 0.35 ~ 0.65 |
| Phosphorus (P) | Tsawg dua lossis sib npaug li 0.025 |
| Sulfur (S) | Tsawg dua lossis sib npaug li 0.015 |
| Chromium (Cr) | Tsawg dua lossis sib npaug li 0.25 |
| Nickel (Ni) | Tsawg dua lossis sib npaug li 0.25 |
| Copper (Cu) | Tsawg dua los yog sib npaug li 0.20 |
| Molybdenum (hli) | Tsawg dua los yog sib npaug li 0.15 |
| Vanadium (V) | Tsawg dua los yog sib npaug li 0.08 |
Cov ntsiab lus tseem ceeb:
Cov pa roj carbon tsawg: Cov ntsiab lus 0.20% carbon muab qhov sib npaug zoo ntawm lub zog thiab ductility, ua kom yooj yim rau vuam thiab tsim.
Tsawg Sulfur & Phosphorus: Cov "tramp elements" no khaws cia tsawg heev los txhim kho toughness thiab tiv thaiv kev tawg thaum lub sij hawm vuam los yog siab -kev pab kub.
4. Mechanical Properties (ib GB/T 5310)
Cov khoom yog lav los ntawm cov chaw tsim khoom los ntawm kev sim.
| Khoom | Tus nqi |
|---|---|
| Tensile zog (σb) | Ntau dua lossis sib npaug rau 410 MPa (MPa) |
| Yield zog (σs) | Ntau dua lossis sib npaug rau 245 MPa (MPa) |
| Elongation (δ) | Ntau dua lossis sib npaug li 24% |
| Impact Toughness | Ua tau raws li tus qauv xav tau |
5. Cov yam ntxwv tseem ceeb & kev ua tau zoo
Siab -Tsub Muaj Zog:20G yog tsim los tswj nws cov qauv kev ncaj ncees thiab tiv thaiv "tso" (kev deformation qeeb hauv qhov kev ntxhov siab tas li) ntawm qhov kub thiab txias feem ntau txog 450-480 degree.
Zoo Oxidation Resistance:Nws tsim cov txheej txheem oxide ruaj khov uas tiv thaiv kev scaling hauv chav ib puag ncig.
Weldability zoo heev:Vim nws cov ntsiab lus tsis tshua muaj carbon, nws tuaj yeem yooj yim welded siv ntau txoj hauv kev yam tsis muaj ua ntej - cua sov los yog tom qab - vuam cov cua sov hauv feem ntau (txawm tias cov txheej txheem tshwj xeeb yuav tsum ua raws li ib txwm).
Ua haujlwm zoo txias thiab kub:Nws tuaj yeem khoov, flanged, thiab tsim yam tsis muaj cracking.
6. Kev siv ntau
20G kav tsuas yog siv rau hauv cov chaw tsim hluav taws xob, muaj boilers, thiab cov tshuab siab:
Superheater Tubes:Qhov twg saturated chav yog ntxiv rhuab mus ua superheated chav.
Reheater Tubes:Reheating chav tom qab nws tau nthuav tawm ib nrab los ntawm lub turbine.
Economizer Tubes:Ua ntej- cua sov lub boiler feedwater siv flue gas, txhim kho efficiency.
Dej Phab Ntsa Tubes:Muab cov phab ntsa rau hauv qhov cub uas cov dej tig mus rau hauv chav.
Main Steam Pipes & Headers:Kev thauj cov siab - siab zog ntawm lub boiler mus rau lub turbine.
General Pressure Vessel Cheebtsam:Rau lwm qhov siab - kub thiab siab - kev pabcuam siab.
7. Sib piv nrog Cov Qib International
20G ua haujlwm zoo ib yam li ntau qib thoob ntiaj teb:
| Lub teb chaws | Txuj | Qib zoo sib xws |
|---|---|---|
| USA / Int'l | ASTM A106 / ASME SA106 | Qib B |
| USA / Int'l | ASTM A210 / ASME SA210 / ASTM A210 / ASTM A210 / ASME SA210 / ASTM A210 / ASTM A210 / ASME SA210 / ASTM A210 / ASME SA210 / ASTM A210 / ASME SA210 / ASTM A210 / ASME SA210 / ASTM A210 / ASME SA210 / ASTM A210 / ASME SA210 / ASTM A210 / ASME SA210 / ASTM A210 / ASME SA210 / ASTM A210 / ASME SA210 / ASTM A210 / ASME SA210 / ASTM A210 / ASME SA210 / ASTM A210 / ASME SA210 / ASTM A210 / ASME SA210) | Qib A-1 |
| Lub teb chaws Yelemees | TIAB SA 17175 | Nqe 45.8 / 35.8 |
| Nyiv | JIS G3461 | SWB 410 |
Nco tseg:Txawm tias zoo sib xws, cov qib no tsis zoo ib yam. Kev hloov pauv ncaj qha yuav tsum tau ua tib zoo tshuaj xyuas cov qauv tsim tshwj xeeb, tshuaj muaj pes tsawg leeg, thiab cov cuab yeej cuab tam txwv.
8. Kev txiav txim siab tseem ceeb rau cov neeg yuav khoom thiab cov kws tsim khoom
Ntawv pov thawj:Nco ntsoov xyuas kom cov khoom tuaj nrog qhov siv tauMill Test Certificate (MTC)los yogKev soj ntsuam daim ntawv pov thawjuas txheeb xyuas nws ua tau raws li qhov yuav tsum tau muaj ntawm GB / T 5310.
Tsis yog -Kev Ntsuas Kev Puas Tsuaj (NDT):Boiler raj feem ntau xav tau 100% NDT, xws liKev kuaj ultrasonic (UT)los yogEddy Current Testing (ET), kom ntseeg tau tias tsis muaj qhov tsis xws luag sab hauv lossis qhov chaw uas tuaj yeem ua rau tsis ua haujlwm.
Kev kho cua sov:20G cov kav dej feem ntau yog muab rau hauvnormalizedThaum tshav kub kub kho mob, uas optimizes lub microstructure rau siab - kub kev pab cuam.
Dimensional Tolerances:GB/T 5310 qhia txog kev ua siab ntev rau sab nraud, phab ntsa tuab, thiab qhov ncaj kom ua kom haum zoo- nyob rau hauv boiler kev tsim kho.
Cov ntsiab lus
20G Carbon Steel Boiler Yeeb Nkabyog ib qho zoo -zoo, txhim khu kev qha, thiab siv dav siv cov khoom tshwj xeeb uas tsim los rau kev ua haujlwm siab - siab thiab siab - qhov kub thiab txias hauv kev tsim hluav taws xob thiab kev lag luam boiler. Nws qhov sib npaug sib npaug muab kev sib xyaw ua ke zoo heev ntawm lub zog, weldability, thiab ntev - kev ua tau zoo raws li qhov xav tau. Thaum muab khoom, nco ntsoov ua raws li GB / T 5310 tus qauv thiab xav tau cov ntaub ntawv tsim nyog.
