ASTM A213 T9 Aloyi zitsulo Tubing

Mabanki a superheater, ma reheater circuits, HRSG convection sections ndi ma heater coil amakumana ndi machubu-kutentha kwachitsulo ndi ma oxidation oxidation omwe amachulukirachulukira-Cr alloys. ASTM A213 T9 imapereka mphamvu zotentha kwambiri komanso machitidwe ocheperako kuposa magiredi 1.25-2.25Cr popanda kukhudzika kwazitsulo za 9Cr-V-Nb, zomwe zimapangitsa kukhala chisankho chothandiza komwe maola ambiri, matenthedwe otenthetsera ndi kukhulupirika kwa koyilo zimalamulira pachiwopsezo.

ASTM A213/SA213 imatanthauzira aloyi opanda msoko-zitsulochubukwa boilers ndi exchanger kutentha. Mapulojekiti amafotokozera m'mimba mwake, khoma locheperako komanso kutalika kwake molunjika pa datasheet m'malo mwa ndandanda yamapaipi. Kuwongoka ndi kupendekeka kwake nthawi zambiri zimamizidwa kuti chubu-kuti-chikwane machubu; malekezero ake ndi osavuta kapena masikweya-bwalo -odulidwa kuti aziwotcherera, okhala ndi ma bevel okha pomwe amapangira zowotcherera.

Table 1 - A213 T9 chemical composition (wt.%)

Tebulo 2 - Zochepa zowonera

Kupanga kumagwiritsa ntchito kupanikizika kovomerezeka pa kutentha kwa ntchito kuchokera ku code yolamulira.

Kuchita kumayendetsedwa ndikutentha kwachitsulo, kuyamba-kuyimitsa pafupipafupi ndi ma depositi pamwambakuchitira limodzi. Ndi ~ 9% Cr, okosijeni amakonda kutsatira alamulo la parabolic(okusayidi-kukhuthala² ≈ k·nthawi); kuchuluka kwa mawu ofotokozera kumakhala kotsika kwambiri kuposa kutsika-Cr steels, zomwe zimachepetsa makulidwe a sikelo ndi zochitika za spallation. Mo imathandizira ma carbides, kuchedwetsa kutsetsereka kwa njere-kutsetsereka kwa malire ndi kukula kwa zibowo kotero kuti kutha kwa khoma nthawi-kuchepekera.

Muotentha, zigawo youmamonga zotentha-mabwalo otenthetsera ndi mabanki owongolera chotenthetsera, T9 imateteza kuzungulira ndi makulidwe a khoma kuposa zosankha za 1.25–2.25Cr, kuchepetsa ma frequency a retube ndi kuyipitsa pansi kwa mtsinje komwe kumachitika chifukwa cha sikelo. Mu ntchito ya HRSG yokhala ndi njinga pafupipafupi, kutentha kumakweza kupanikizika kwa okosidi ndikuwonjezera kuphulika/"re{5}}oxidation"; kuwongolera makwerero, kukhathamiritsa kuombera kwa mwaye{6}, ndi kutsatirachubu-kutentha kwachitsulo (TMT)malo otentha kwambiri amachepetsa chiopsezo. Deposit chemistry matter: alkali-zolemera kapena sulfure-zokhala ndi phulusa zimatha kusintha okosidi ndikufulumizitsa kuwukira kwanuko, motero kusanthula kwamafuta/phulusa limodzi ndi kuyang'ana kwa borescope kumagwiritsidwa ntchito pokonza zoyeretsa ndi zoyendera.

Pakukwawa, mwayi wa T9 umakhala mumadera-atali kwambiri: mpweya wabwino, wosalekeza-opitilira malire a carbide network kuchokera ku kutentha koyenera kumapangitsa kuti nthawi yong'ambikayi ikhale yabwino komanso kumapangitsa kuti thupi likhale lofanana. Kutentha kwambiri kapena kosakwanira{2}}kutenthetsanso kowongoleredwa kumayatsa njere ndikupangitsa ma carbides kukhala otumbululuka, kutulutsa kuphulika msanga, ovality kapena kutayikira. Muzochita, trendingmakulidwe a oxide / kulemerapamodzi ndi mbiri ya TMT imapereka umboni wotsimikizira kuwunika.

Tebulo 3 - Siginecha yapagawo motsutsana ndi mayankho a mainjiniya

Tebulo 4 - Emvulopu yowoneka bwino

Maonekedwe a pamwamba nthawi zambiri amasankha moyo wonse pantchito yotentha. Njira yoyendetsera ntchito ndi:de-sikelo → kuyeretsa → kupukuta → kapu → kukulunga → tsimikizirani. Mukapanga, chotsani kutentha ndi sikelo yotsalira ku ID/OD; tsitsani ndi media zoyera, kenako yumitsani ID ku chandamale chomwe chalembedwa (mwachitsanzo, mame pansi pa malo ozungulira ndi m'mphepete mwake). Zokwanirazisoti zolimbandikugwiritsa ntchito zotchingira zoteteza zomwe zimakana fumbi ndi chinyezi; sungani mitolo pansi ndi ngalande ndi chitetezo UV.

Kuvomereza kuli mu ITP kotero kuti QA ikhoza kusaina popanda kutsutsana. Fotokozani tanthauzo la "kuyera" (gulu lowoneka, malire a kloridi/mafuta ngati kuli kotheka), momwe kuuma kumayendera, ndi zotengera zotani zomwe zimafunikira pakusungirako. Sungani carbon-zida zachitsulo kutali ndi machubu a T9 kuti musatseke-kuyika chitsulo kwaulere; kumene masitolo osakanikirana sangalephereke, sungani positi-kuyeretsaferroxyl kufufuzapa zitsanzo. Musanatulutsidwe, jambulani zithunzi ndikuyika chipika chosungira ndi ID ya mtolo kuti oyikapo adziwe kuti mzerewu sunaipitsidwe posungira.

Kwa ma projekiti okhazikika pa ASTM A213 T9,Octal Pipeamapereka machubu opanda msokonezo, amayanjanitsa njira ndi zolembedwa ndi projekiti ya ITP, ndipo amatha kukonza ulaliki wodziyimira pawokha (mwachitsanzo, BV, SGS) pakafunika.

Q1: Kodi machubu a ASTM A213 T9 (ASME SA213 T9) amagwiritsidwa ntchito chiyani?
A1:Seamless 9Cr-1Mo ferritic alloy chubing ya ma boilers, superheaters, and heat exchanger-kutentha kwambiri, kuthamanga kwambiri.

Q2: Kodi A213 T9 ndi A335 P9?
A2:Nthawi zambiri amawaona ngati ofanana ndi chemistry/UNS (T9=tubing spec, P9=pipe spec), koma muyenera kufananiza mulingo wofunikira wa polojekitiyo komanso kuchuluka kwa mayeso.

Q3: Kodi ndipemphe chiyani kuti nditsimikizire mtundu wa chubu la ASTM A213 T9 musanagule?
A3:3.1 MTC yokhala ndi chiwerengero cha kutentha + kutentha kwa kutentha, zotsatira za chemistry / mechanical, hydrotest kapena NDE (monga momwe tafotokozera), ma checked dimensional, ndi chizindikiro chonse / kufufuza.

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