Cov ntsiab lus tseem ceeb: ASTM A213 yog dab tsi?
ASTM A 213yog tus qauv specification los ntawm ASTM International uas npogseamless ferritic thiab austenitic steel boiler, superheater, thiab tshav kub -exchanger tubes.
Cov ntsiab lus tseem ceeb kom nkag siab yog:
Seamless:Cov kav dej / raj no yog tsim los tsis muaj welded seam, ua rau lawv muaj zog thiab txhim khu kev qha nyob rau hauv siab thiab kub.
Daim ntawv thov:Lawv tau tsim tshwj xeeb rauCov kev pabcuam cua sovnyob rau hauv boilers, superheaters, thiab tshav kub exchangers.
Khoom Qib:Nws npog ob qho tib si carbon (ferritic) thiab alloy steels, tab sis qhov tseem ceeb ntawm no yog nyob rau qib carbon steel.
Cov Ntsiab Carbon Steel Qib hauv ASTM A213
Rau carbon steel, thawj qib yogT5, tab sis A213 kuj suav nrog lwm yam tsawg- alloy steels uas feem ntau yog pawg nrog carbon steels hauv kev sib tham. Cov feem ntau yog:
| Qib | Chemical Composition (Key Elements) | Cov yam ntxwv thiab kev siv |
|---|---|---|
| T5 | 1.25% Chromium, 0.5% Molybdenum(C <0.15%, Mn 0.30-0.60%, Si 0.50%) | Kev ua haujlwm zoo heev rau oxidation thiab creep zog ntawm qhov kub siab (txog ~ 1200℃F / 650 degree). Lub "workhorse" rau ntau qhov kev pabcuam kub siab -. |
| T9 | 9% Chromium, 1% Molybdenum | Ntau dua oxidation tsis kam thiab lub zog ntawm qhov kub siab tshaj T5. Siv nyob rau hauv superheater thiab reheater seem. |
| T11 | 1.25% Chromium, 0.5% Molybdenum, + Silicon | Zoo ib yam li T5 tab sis muaj qhov sib txawv me ntsis silicon txwv. Zoo weldability thiab lub zog. |
| T12 | 1% Chromium, 0.5% Molybdenum | Kev txhim kho dua cov pa roj carbon steel, muab kev tiv thaiv oxidation zoo dua. |
| T22 | 2.25% Chromium, 1% Molybdenum | Lub zog zoo heev thiab ua haujlwm rau hydrogen nres ntawm qhov kub thiab txias. Ib qib alloy zoo heev. |
Nco tseg:Thaum T5, T11, T12, thiab T22 yog technically tsawg- alloy steels vim lawv Cr thiab Mo cov ntsiab lus, lawv nquag tham nyob rau hauv cov ntsiab lus ntawm "carbon steel" piping systems raws li ib tug kauj ruam ntawm cov pa carbon steel (zoo li A106). Qhov tseeb "carbon steel" qib tsis muaj Cr & Mo tsis yog qhov tseem ceeb ntawm A213; lub luag hauj lwm ntawd yog sau los ntawmASTM A179 Cov khoom lag luamrau tshav kub exchangers.
Cov ntsiab lus tseem ceeb ntawm ASTM A213 Specification
Kev tsim khoom:Yuav tsum yog seamless, feem ntau yog tsim los ntawm kev sib tsoo, extrusion, lossis kos duab.
Kev kho cua sov:
Qib zoo li T5, T9, T11, T12, thiab T22yuav tsum tau ua kom sov- kho(tag nrho annealed, normalized thiab tempered, los yog normalized thiab tempered) kom ua tau raws li qhov yuav tsum tau txhua yam khoom thiab microstructure.
Tshuaj muaj pes tsawg leeg:Kev txwv nruj yog muab tso rau ntawm carbon, manganese, phosphorus, sulfur, silicon, chromium, thiab molybdenum.
Mechanical Properties:Tus qauv qhia yam tsawg kawg nkaus uas yuav tsum tau muaj rau:
Tensile zog
Yield zog
Elongation
Hydrostatic Test:Txhua lub raj yuav tsum tau sim ntawm lub siab uas yuav ua rau muaj kev ntxhov siab tsis pub tsawg dua 70% ntawm qhov tsawg kawg nkaus lub zog tawm los rau 5 vib nas this, tsis muaj dej.
Lwm txoj kev:Kev ntsuas hluav taws xob tsis zoo (xws li eddy tam sim no) tuaj yeem siv los hloov, uas yog ntau heev.
Dimensions thiab Tolerances:Npog sab nraud txoj kab uas hla, phab ntsa thickness, thiab ntev nrog meej tso cai variations.
Ntawv pov thawj:Cov chaw tsim khoom yuav tsum muab Daim Ntawv Qhia Txog Kev Xeem (CMTR) uas sau cov khoom siv tshuaj lom neeg thiab lub cev, lees paub cov khoom ua tau raws li tus qauv.
Cov ntawv thov siv
ASTM A213 carbon / alloy steel tubes yog qhov tseem ceeb nyob rau hauv ib puag ncig nrog kev kub siab thiab kub:
Fossil Fuel Power Plants:Nyob rau hauv lub boiler phab ntsa, superheaters, thiab reheaters.
Kub Exchangers & Condenser:Rau kev hloov cov cua sov ntawm cov kua hauv qab siab.
Petrochemical Refineries:Nyob rau hauv cov txheej txheem cua sov, reformer furnaces, thiab lwm yam siab -kub kav.
Nuclear Power Facilities:(Cov ntu tshwj xeeb uas siv cov qhab nia).
Yuav Qhia Li Cas thiab Txiav Txim
Thaum xaj lossis tshuaj xyuas cov ntaub ntawv, koj yuav pom tus qauv thiab qib tau teev tseg. Piv txwv li:
ASTM A213 T5los yogASTM A213 Qib T5
Koj tseem yuav tau qhia meej:
Qhov Loj:Outer Diameter (OD) thiab Yam Tsawg Phab Ntsa Thickness (MWT) lossis Teem sijhawm.
Ntev:Random lossis tshwj xeeb txiav lengths.
Txoj Kev Xeem:Seb yuav tsum tau kuaj hydrostatic lossis nondestructive hluav taws xob.
Kev sib piv nrog lwm cov qauv yeeb nkab
Nws yog ib qho tseem ceeb kom tsis txhob confuse A213 nrog rau lwm cov qauv yeeb nkab:
| Txuj | Title | Daim ntawv thov tseem ceeb | Qhov txawv tseem ceeb |
|---|---|---|---|
| ASTM A 213 | Seamless Ferritic thiab Austenitic Alloy-Steel Boiler, Superheater, thiab Thaum tshav kub kub-Tub Exchanger | Kub Hloovhauv cov khoom siv dag zog | Cov rajrau tshav kub pauv. Tsom ntsoov rau siab -kub yam khoom. |
| ASTM A53 | Yeeb, Hlau, Dub thiab Kub-Dipped, Zinc-Coated, Welded thiab Seamless | Kev Pabcuam General(structural, low-kuaj kav dej) | General - lub hom phiaj yeeb nkab. Tsis yog rau siab - kub hloov pauv. |
| ASTM A106 1 | Seamless Carbon Steel Yeeb Nkab rau siab -Kev Pabcuam Kub | Siab Pipingsystems (chaw, dej, roj) | Yeebrau conveying kua. Kev siv dav dua li A213. |
| ASTM A179 Cov khoom lag luam | Seamless Txias-Kaw Tsawg- Carbon Steel Thaum tshav kub kub-Exchanger thiab Condenser Tubes | Thaum tshav kub kub Exchangers & Condenser | Qhov tseebcarbon hlausib npaug rau qis dua -kub kub pauv. |
Cov ntsiab lus
ASTM A213 Carbon Steel (thiab qis- alloy) Cov kav dej / rajyog siab -kev ua tau zoo, seamless khoom engineered rau cov kev pab cuam tseem ceeb nyob rau hauv siab - siab thiab siab - qhov kub thiab txias, tshwj xeeb tshaj yog nyob rau hauv lub tshav kub hloov lwm lub tsev yog lub luag haujlwm tseem ceeb. Qib T5 yog qib "carbon-} nplua nuj" feem ntau siv, muab qhov sib npaug zoo ntawm lub zog, weldability, thiab oxidation tsis kam rau ntau hom kev lag luam.
