** 1. Dab tsi yog kev faib tawm ntawm cov kav dej steel? **
Hlau kav hlau tau faib raws li ob peb tus yam ntxwv tseem ceeb:
* ** Cov txheej txheem tsim khoom: ** Cov yeeb nkab loj yog ** ua los ntawm cov khaub noom) thiab ** Welded yeeb nkab ** (tsim los ntawm cov phaj steel lossis cov hlua khi rau welded.
* ** PEM TSEG: ** Thaum lub sijhawm feem ntau yog puag ncig, lawv kuj tseem tuaj yeem ua square, duab plaub, lossis lwm yam duab (hu ua lub raj tsiaj).
* ** Qhov loj me: ** Feem ntau: ** Feem ntau yog feem ntau los ntawm nominal cov yeeb nkab loj (nps) thiab lub sij hawm (phab ntsa (OD) thiab phab ntsa tuab.
* ** TAWM HOM PHEM: ** PIPES tuaj yeem muaj cov xaus xaus, beveled xaus rau vuam, lossis cov ntawv xaus.
* ** DAIM NTAWV THOV: ** Lawv tau raug cais los ntawm lawv cov kev siv, xws li kab yeeb nkab rau boilers
** 2. Tus Qauv Qib ntawm Hlau Yog Dab Tsi? **
Tsis muaj ib qho "qauv" qib ntawm cov hlau. Cov qib tsim nyog yog nyob ntawm daim ntawv thov. Txawm li cas los xij, qee qhov ntawm feem ntau thiab dav siv cov qauv txheem yog:
* ** AVTM A36: ** Cov ntaub pua av qis siv rau cov qauv txheej txheem dav dav zoo li vaj tse thiab choj.
* ** ASTM A500: ** Ib qib carbon steel siv rau kev ua yeeb yam hauv kev tsim kho.
* ** SAIN / AIS / ANE 1018: ** Ib qho General- Cov hom phiaj tsis tshua muaj hlau nrog weldability weldability thiab lub zog, siv rau cov shafts, pins, thiab Machinery qhov chaw.
* ** SAE / AISI 1045: ** Ib nrab pa roj carbon steel paub txog nws lub zog zoo thiab hnav tsis kam, Axles, thiab bolts.
** 3. Cov yeeb nkab qib yog dab tsi? **
ASME (American Society of cov neeg kho tshuab engineers) nws tus kheej tsis tsim cov qib khoom. Hloov chaw, ASME boiler thiab siab hlab ntsha code (BPC) * Kev pom zoo * Cov Khoom Siv Specifications los ntawm Astm (American Society rau kev sim thiab cov ntaub ntawv). Yog li ntawd, ib qho "asme yeeb nkab" yog ib qho yeeb nkab Astm uas muaj ntawv pov hwm rau siv nyob rau hauv Asme code. Cov qauv piv txwv suav nrog:
* ** ASME SA53: ** Cov yeeb nkab rau cov kev siv tshuab thiab kev siv siab.
* ** ASME SAX6: ** Seamless Carbon Steel Yeeb Nkab Rau Siab-}, hauv cov nroj tsuag fais fab).
* ** ASME SA312: ** Seamless thiab Welded Stainless Hlau Yeeb Rau Corrosive Service.
Tus "SA" Prefix qhia tias yog tau txais los ntawm ASME.
** 4. Qib 1 thiab qib 2? **
Lub ntsiab lus ntawm "Qib 1" thiab "Qib 2" hloov pauv raws tus qauv tshwj xeeb. Ntawm no yog cov kev tshaj tawm feem ntau:
* ** Hauv Astm A193 (Bolting rau high- kev pab kub): ** Qib B7 yog muaj ntau heev. Qib B16 yog lwm tus. "Qib 1" thiab "2" tsis yog feem ntau siv ntawm no.
* ** Hauv API 5L (cov yeeb nkab kab rau cov roj / roj tsheb A thiab qib B xa mus rau cov txiaj ntsig zog (qib B muaj zog dua qib A).
* ** Hauv kev lag luam dav dav: ** Nws tuaj yeem hais txog lub zog zoo lossis muaj zog dua li qib qib 1. Txawm li cas los xij, zoo li ASTM lossis API) yuav tsum tau hais txog.
** 5. Dab tsi yog 4 hom hlau? **
Plaub hom steel yog cais los ntawm lawv cov tshuaj lom neeg muaj pes tsawg leeg:
* ** Carbon Steel: ** Feem ntau hom, ua txog 90% ntawm cov hlau ntau lawm. Nws cov khoom tau txhais tau tias feem ntau los ntawm nws cov ntsiab lus carbon (qis, nruab nrab, siab). Nws muaj zog thiab tus nqi -} zoo tab sis tau xeb.
* ** ALLOY STEEL: ** muaj cov ntsiab lus ntxiv xws li chromium, thiab vanadium nyob rau hauv cov khoom tseem ceeb xws li nce lub zog, hardness, lossis hnav tsis kam yam tsis muaj kev kho cua sov.
* ** Feem pua Stainless: ** Muaj feem pua siab ntawm chromium (tsawg kawg 10,5%) uas muab nws zoo tshaj plaws corrosion thiab xeb tsis kam. Cov qib kawm yog 304 thiab 316.
* ** TIT Steel: ** Ib qho nyuaj heev, hnav -}} Cov hlau tiv taus tshwj xeeb rau kev ua cov cuab yeej, tuag, thiab cov khoom txiav. Nws muaj cov ntsiab lus zoo li tungsten, molybdenum, thiab cob qhov ntawd tso cai rau nws los tuav ib qho kev txiav ntse.
