Cov ntsiab lus ceev
ASTM A192 yog ib qho kev qhia tshwj xeeb rauseamless carbon steel boiler rajrau siab - kev pabcuam siab. Cov kav dej / raj no yog tsim los siv nyob rau hauv ib puag ncig uas muaj qhov kub thiab txias, xws li hauv boilers, superheaters, thiab tshav kub exchangers. Lawv cov yam ntxwv tseem ceeb yog lub zog zoo heev thiab kev ntseeg siab nyob rau hauv siab.
1. Cov yam ntxwv tseem ceeb thiab kev siv
Hom:Seamless (Tsis muaj welded seam, ua rau nws muaj zog thiab txhim khu kev qha nyob rau hauv siab).
Kev Siv Tseem Ceeb:High -kev siv siab.
Ib puag ncig zoo:
Boilers (Lub raj dej boilers, hluav taws kub boilers)
Superheaters
Thaum tshav kub kub Exchangers
Cov nkoj siab
Vim li cas thiaj xaiv:Nws muaj kev txhim khu kev qha ua ke ntawm lub zog, ductility, thiab weldability, tshwj xeeb tshaj yog rau cov kev pab cuam uas tsis ua hauj lwm yog ib qho kev xaiv.
2. Tshuaj muaj pes tsawg leeg
Cov tshuaj muaj pes tsawg leeg yog nruj tswj hwm los xyuas kom meej weldability thiab lub zog. Nco ntsoov cov ntsiab lus ntawm cov pa roj carbon tsawg thiab alloy, uas yog ib qho zoo rau cov hlau.
| Element | Kev sib xyaw (%) |
|---|---|
| Cov pa roj carbon (C) | 0.06 - 0.18 % |
| Manganese (Mn) | 0.27 - 0.63 % |
| Phosphorus (P) | 0.035% max |
| Sulfur (S) | 0.035% max |
| Silicon (Si) | 0.25% max |
| Nco tseg: | Copper (Cu) yuav tsum tau siv yog tias tau teev tseg. |
3. Mechanical Properties
Cov khoom no ua kom lub raj tuaj yeem tiv taus lub siab sab hauv thiab cov neeg kho tshuab kev ntxhov siab.
| Khoom | Tus nqi |
|---|---|
| Tensile zog | 325 MPa (47,000 psi)min |
| Yield zog | 180 MPa (26,000 psi)min |
| Elongation | - 35% min (ntawm 2-in. gauge length) - 25% min (ntawm 8-in. gauge length) |
4. Kev tsim khoom thiab kev xeem yuav tsum tau ua
ASTM A192 cov raj yog raug rau cov kev ntsuam xyuas nruj kom paub tseeb tias lawv txoj kev ncaj ncees:
Hydrostatic Test:Txhua lub raj yuav tsum raug kuaj rau qhov tshwj xeeb hydrostatic siab yam tsis muaj qhov cuam tshuam los yog qhov tsis xws luag.
Flattening Test:Ib lub nplhaib ntawm lub raj yog flattened mus rau ib qho kev ncua deb los ua pov thawj nws ductility thiab soundness.
Flare Test:Lwm qhov kev sim rau ductility, qhov kawg ntawm lub raj yog flared tawm mus rau ib txoj kab uas hla.
Hardness Test:Yeem, tab sis tej zaum yuav raug teev los xyuas qhov sib xws.
Nondestructive Electric Test:Feem ntau siv los ua lwm txoj hauv kev sim hydrostatic, xws li kev ntsuas tam sim no.
5. Qhov ntau thiab tsawg
Thaum A192 npog ntau yam, nws yog feem ntau nkag rau hauv cov yeeb nkab / raj qhov ntau thiab tsawg.
Sab nraud txoj kab uas hla (OD):Feem ntau ntawm 1/8 nti mus rau 7 ntiv tes, tab sis tuaj yeem loj dua.
Phab ntsa Thickness:Kev tswj hwm los ntawm ASME Boiler thiab Pressure Vessel Code, feem ntau siv raws li "Minimum Wall" cov sijhawm.
Qauv:Tshwj xeeb qhov ntev yog feem ntau muab rau hauv cov qauv zoo liASME SA192(lub ASME version ntawm ASTM A192) thiab cov lus siv xws liASTM A 450 1.5 hli.
6. A192 vs. Lwm yam khoom siv Boiler Tube
Nws yog qhov pab tau los sib piv A192 rau lwm cov kev qhia zoo sib xws:
| Khoom siv | Qhov txawv tseem ceeb | Hom Siv Case |
|---|---|---|
| ASTM A192 Cov Lus Qhia Tshwj Xeeb | Standard carbon hlaurau siab - kev pabcuam siab. | General boiler raj, cua sov exchangers. |
| ASTM A 210 Cov Lus Qhia | Npogseamless nruab nrab - carbon steelcov raj. Lub zog siab dua A192. | Boiler superheater thiab kub exchanger raj. |
| ASTM A179 Cov khoom lag luam | Seamless txias-tso qis- carbon steelcov raj. softer, zoo rau khoov. | Thaum tshav kub kub exchangers, condensers, qhov twg cov hlab yog bent. |
| ASTM A106 1 | Rauseamless carbon steel yeeb nkabrau siab - qhov kev pab kub (tsis yog boilers nkaus xwb). | General high -temp service, fais fab nroj tsuag, refineries. |
7. Cov lus ceeb toom tseem ceeb rau cov neeg yuav khoom thiab cov kws tsim khoom
"SA192" vs "A192":Koj yuav nquag pom nws sau liSIB 192. Qhov no yog qhov kev xaiv ASME, uas yog qhov tseem ceeb zoo ib yam rau ASTM A192 tus qauv. Rau boiler thiab siab hlab ntsha code tsim, SA prefix yog siv.
Tsis yog Bending:A192 raj feem ntau tsis pom zoo rau kev khoov dav lossis flaring vim lawv tsis txias -kos zoo li A179. Rau cov ntawv thov uas yuav tsum tau khoov, A179 yog qhov kev xaiv zoo dua.
Nco ntsoov Qhia:Thaum txiav txim, qhia meej meej tus qauv (ASTM A192 / ASME SA192), qhov loj me (OD thiab phab ntsa tuab lossis lub sijhawm), ntev, thiab lwm yam kev ntsuas ntxiv.
Xaus
ASTM A192 / SA192yog cov khoom siv tseem ceeb thiab tseem ceeb rau kev tsim hluav taws xob thiab cov txheej txheem kev lag luam. Nws txoj kev tswj hwm nruj ntawm chemistry thiab mechanical zog, ua ke nrog qhov yuav tsum tsis yog - kev kuaj kev puas tsuaj, ua rau nws xaiv kev nyab xeeb thiab txhim khu kev lag luam hauv siab - siab, siab - qhov kub thiab txias ib puag ncig xws li boilers.
Rau cov ncauj lus kom ntxaws thiab qhov project- cov ntaub ntawv tseem ceeb, ib txwm xa mus rau tag nrho, qhov tseeb version ntawm lubASTM A192 tus qauv specification.
