Matchulidwe a ASTM A213 T11 - BLOG

Mafotokozedwe Akatundu

ASTM A213 Grade T11 ndi chubu cha ferritic ferritic chromium-molybdenum (Cr-Mo) chomwe chimagwiritsidwa ntchito potentha nthunzi ndi flue{4}}malo a mpweya. Gawoli limapangidwa kuti likhale ndi mphamvu-zonyamula zinthu mu ma boiler amagetsi, ma HRSG, ma heaters a petrochemical and high-zosinthanitsa kutentha komwe chitsulo cha kaboni sichimatha kupirira ndi okosijeni kapena kukwawa.
Octal Pipe imapereka T11 mumkhalidwe wanthawi zonse-ndi-kupsya mtima, yoyang'anira dimensional, kuyesa kwathunthu ku ASTM A213/A1016 ndi satifiketi ya mphero, kuti ipite molunjika mu boiler ndi kukonza zopangira.

astm a213 t11 tubing bundles for boiler and superheater service - octal pipe

Chemical zikuchokera

Chinthu	Zomwe zili (%)	Ntchito
C	0.05 – 0.15	Amapereka mphamvu ndi kukana zokwawa, amakhala weldable
Mn	0.30 – 0.60	Ductility, kutentha ntchito
Si	0.50 – 1.00	Imathandizira kukana kwa okosijeni
P	Ochepera kapena ofanana ndi 0.025	Malire ebrittlement
S	Ochepera kapena ofanana ndi 0.025	Kuwongoleredwa chifukwa cholimba
Cr	1.00 – 1.50	Kuchulukitsa kukana mu mpweya wa nthunzi / flue
Mo	0.44 – 0.65	Kuthamanga ndi kuphulika kwamphamvu

Magiredi a chromium–molybdenum ndi ocheperapo kuposa T22 kapena apamwamba kuposa ena-magiredi a Cr, nchifukwa chake T11 imapindika ndikuwotchera mosavuta, komabe imakhalabe ndi mayendedwe a digirii 500–600.

Zimango katundu

Katundu	Chofunikira	Cholinga
Kulimba kwamakokedwe	Kuposa kapena kufanana ndi 415 MPa (60 ksi)	Kuchuluka kwa katundu
Mphamvu zokolola (0.2%)	Kuposa kapena kufanana ndi 205 MPa (30 ksi)	Zimalepheretsa kusinthika kosatha
Elongation	Kuposa kapena kufanana ndi 30%	Zofunikira pakupinda, kukulunga, kuwotcherera
Kuuma	Zochepera kapena zofanana ndi 163 HBW	Amasunga kulimba kwa njinga yamoto yotentha

Miyezo iyi ikufanana ndi momwe zimakhalira nthawi zonse-ndi-zomwe zimaperekedwa zomwe zimafunikira mphamvu ndi mapulojekiti oyenga.

Kupanga ndi kutentha mankhwala

Pa ntchito ya boiler chubu njira ndiyofunika kwambiri monga chemistry. Octal Pipe imagwiritsa ntchito njira yopanda msoko pansi pa ASTM A213/A1016:

alloy billet ndi otentha-kulasidwa kapena kutulutsa phokoso kuti apange phokoso
chubu chimakhala chotentha-chogudubuzika kapena chozizira-chimakokeredwa ku OD yokonzedwa, khoma ndi pamwamba (zofunika pakutentha-machubu osinthanitsa)
chubucho chimakhala chokhazikika pafupifupi 940-980 digiri kuti iyeretse matrix a ferritic, kuchotsa zomangira ndikufananitsa zida zamakina motalika.
chubu chimatenthedwa pafupifupi madigiri 675-755 kuti abwezeretse ductility ndikutseka kufalikira kwabwino kwa ma carbides m'malo mwake.

Kuzungulira kwa N + T kumeneku ndi komwe kumapatsa T11 mawonekedwe ake okhazikika: chromium imatha kupanga filimu yolimba ya oxide, molybdenum imatha kugwira ntchito yake pakulimbitsa zokwawa, ndipo chubu sichikhala chovuta kwambiri kuti chiwotchere. Pambuyo pothira kutentha, machubu amawongoledwa, kuyesedwa ndi hydrostatically, ndi kufufuzidwa ndi njira ya NDE yolamulidwa (eddy-panopa kapena akupanga) asanaikidwe chizindikiro ndi kulongedza. Chilichonse chimalembedwa kuti chubu lizitha kutsata kutentha.

Dimensional range

Parameter	Range / zambiri
M'mimba mwake	12.7 - 127 mm (0.5 - 5 mkati)
Khoma makulidwe	1.2-12 mm
Utali	mpaka 12 m; SRL / DRL / kudula-mpaka-utali
Kumaliza kumaliza	Zosawoneka bwino, zopindika, kapena zokonzekera U-kupindika / kupiringa
OD kulolerana	kawirikawiri ± 1% (pa ASTM A1016)
Kulekerera kwa khoma	kawirikawiri ± 10%
Kuwongoka	Nthawi zambiri Ochepera kapena ofanana ndi 0.8 mm/m

Izi zimaphimba machubu wamba wa boiler, ma coil otenthetsera / otenthetsera, ndi ma heater oyezera.

Kuchita kwautumiki

Pogwira ntchito T11 imapanga uniform chromium-rich oxide, motero kutaya kwa chubu ndi masikelo{2}}kumakhala kochedwa kusiyana ndi carbon steel. Molybdenum imachepetsa kukwapula ndi kuphulika, zomwe ndizofunikira kwa machubu omwe amakhala pansi pa kutentha ndi kupanikizika kwa maola masauzande. Chifukwa kamangidwe kake kamakhala kotentha, chubu chimalekerera kuyambika-kuyimitsa mu ma HRSG ndi zomera zophatikizana popanda kutaya kuwongoka msanga. Ma weld amasungabe kukhulupirika pambuyo pa PWHT pomwe zitsulo zotsika-zodzaza ndi aloyi zimagwiritsidwa ntchito.

Mapulogalamu

boiler waterwall, superheater, reheater ndi machubu a economizer muzipinda zamagetsi zamagetsi
HRSG / kuphatikiza-majenereta ozungulira nthunzi
petrochemical ndi refinery process heaters
mkulu-chipolopolo cha kutentha{1}}ndi-zosintha machubu
otentha zofunikira ndi mizere ndondomeko mkati mphamvu ndi mayunitsi mankhwala

Kuyendera ndi zolemba

Kuyesa kumachitika molingana ndi ASTM A213 komanso zofunikira zonse za A1016. Izi zikuphatikizapo hydrostatic kapena eddy-kuwunika kwapano kwa kulimba kwa khoma, kulimba ndi kuyesa kulimba pa kutentha kulikonse{4}}malo ochitira chithandizo, flattening/flaring kuti atsimikizire ductility, komanso kuyang'ana kowoneka ndi mawonekedwe. Kwa ma projekiti okhala ndi QA / QC yapamwamba, Octal Pipe imatha kuwonjezera macheke a ultrasonic kapena radiographic. Machubu onse amaperekedwa ndi EN 10204 3.1 kapena 3.2 MTCs kuti eni ake azitha kufayila zotsatira za makemikolo, makina ndi NDE ndi nambala ya kutentha.

Chifukwa chiyani gwero la ASTM A213 T11 kuchokera ku Octal Pipe

real seamless Cr-Mo tubing in normalized-ndi{2}} tempered condition, osati generic carbon-steel chubu
miyeso, mayeso ndi chizindikiro chogwirizana ndi mphamvu, boiler, HRSG ndi zoyezera
kutumiza{{0}mapaketi okonzeka okhala ndi chitetezo chokwanira-kutumiza kutali
thandizo la uinjiniya kuti lifanane ndi T11 ndi Cr yogwirizana-Magiredi a Mo (T22, A335 P11/P22) pamene gawo limodzi limagwiritsa ntchito ma aloyi angapo
tsamba lolembedwa-choyamba komanso mwaukadaulo, kuthandiza tsamba lanu latsopano kuti lizilondoleredwa ngati tsamba laopereka, osati template zomwe zili

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