ASTM A213 T5 Alloy Steel Tubing

ASTM A213 T5 e sebelisoa moo mocheso oa tšupu-ea tšepe le taolo ea oxidation e laolang bokhuts'oane ba moralo. Ka li-boilers, HRSGs le li-heaters tse chesitsoeng, T5 e nka sehlopha se ka holimo ho li-alloys tsa 1.25-2.25Cr ha khanyetso ea sekhahla le matla a ho nyoloha a tlameha ho ntlafatsoa ntle le ho fallela lelapeng la 9Cr. Lihora tsa ts'ebeletso li telele, likhahla tsa mocheso ke tsa 'nete,' me botšepehi ba coil bo bohlokoa ho feta ho bola ha metsi.

T5 ke tšepe ea 5Cr-Mo ferritic. Chromium e etsa butle-oxide e ntseng e hola ho fokotsa sekhahla, ha molybdenum e tsitsisa li-carbides le ho liehisa ho senyeha ha sekhahla. Tsela ea ho etsa thepa e ikemiselitse ho fana ka mokhoa o ts'oanang oa ferritic matrix o pholohang ho kobeha le ho sebetsa ntle le libaka tsa -tse thata kapa tse fetang{6}}tse bonolo.

Lipehelo tsa sebopeho tse ka tlase ke tsa tlhahlobo ea pele; ho reka ho latela mongolo o laolang.

Lethathamo - Sebopeho sa lik'hemik'hale (wt.%)

Li-minima tsena li thusa ho etsa boholo ba pele; -litumello tsa mocheso o phahameng li nkuoa ho khouto e sebetsang nakong ea moralo.

Lethathamo - Bonyane ba lisebelisoa tsa mochini

ASTM A213 e laola li-tubing ho fapana le linako tsa lipeipi. Mananeo a hlalosa OD, lebota le bolelele ba ho seha ho lumellana le mabenkele a li-coil le li-tube-ho{3}}mosebetsi oa li-tubesheet.

Tafole - Fesetere e tloaelehileng ea boholo

Histori ea mocheso e laola bophelo ba ts'ebeletso ea li-tubing tsa T5, kahoo WPS/PQR e lokela ho notlela ka har'a sehlopha sa mocheso se tšoanelehang bakeng sa ho futhumatsa, nako ea ho koloba, le sekhahla sa ho pholisa. Li-bends li hlahisoa ka ho kenngoa kapa ho laoloa ho chesa ho etsoa ka mocheso o ts'oanang ka lebota; mocheso o feteletseng oa interpass kapa nako e telele e tšoara lijo-thollo tse mahoashe le ho fokotsa bokhoni ba ho hahaba.

Kamora ho kobeha, thepa e netefatsoa ho fapana le ho nahanoa. 'Mapa oa ho thatafala ho tloha ho tšepe ea motsoali ka har'a li-extrados,{1}}bohareng, le li-intrados li tiisa hore ho kobeha ho lula ka har'a fensetere e loketseng. Dimensional checks-ovalality, thinning, springback, and centerline radius-etsa bonnete ba hore coil kapa U-bend e tla lula ka har'a lishiti{6}}le litšehetso ntle le khatello e feteletseng.

Ho otlolla serame le litokiso tsa lehae li lula li le hlokolosi. Ho lateloa ha serame se bokellaneng, 'me hang ha se se se fetile, tšupu e tla futhumatsa-ka har'a enfelopo e loketseng ho khutlisa ductility le ho tsitsisa carbides. Ho futhumala ho sa laoleheng ha toche hoa qojoa hobane ho ka baka lebala ho feta-rimo kapa lirimo tse thata.

Phekolo ea mocheso e reriloe e le tsamaiso, eseng patch. Thepa e fanoa ka mokhoa o tloaelehileng-le{2}}boemo bo itekanetseng; ha thempereichara e feta mocheso oa pele-kapa ha lits'ebetso li hloka-etsa ka botlalo-tloaeleha-le{7}}bohale (kapa ho lumellanoeng ka potoloho e tlase) ho khutlisetsa mokhoa o ts'oanang oa ferritic matrix pele ho hydrotest le NDE. Lichate tse rekotiloeng tsa mocheso oa potoloho ka 'ngoe li kenngoa ka har'a sephutheloana sa thekiso e le hore khoele e kentsoeng e ka lateloa nalaneng ea eona ea mocheso.

Eketsa masalla le matlakala a kentsoeng a khutsufatsa bophelo le ho fokotsa mocheso{{0}ka mokhoa o sebetsang oa phetisetso. ID e hloekileng, e omeletseng e nang le lipheletso tse koaletsoeng le mekotla e sirelelitsoeng e thibela ho kenella ha likotoana nakong ea polokelo le thomello. Mekhoa ea ho amoheloa bakeng sa ponahalo ea ID / OD le bohloeki li ngotsoe ho ITP ha taolo ea litšila e le ea bohlokoa.

Tube e 'ngoe le e' ngoe e netefatsoa ke tlhahlobo ea hydrostatic kapa tlhahlobo ea motlakase e sa senyeheng joalo ka ha ho hlokoa ke ASTM A213. Li-coil tsa bohlokoa li eketsa-length eddy{2}litlhahlobo tsa hona joale kapa tsa ultrasonic continuity checks. Boikoetliso ba ho batalatsa, flare le flange bo bonts'a ductility bakeng sa ho kenya. Positive material identification (PMI) by bundle e koala alloy-identity loop.

Lethathamo - Leano la ho netefatsa

Phetoho e hloekileng e kenyelletsa li-MTC tse tlamelletsoeng ho futhumatsang le liphutheloana,{0}}lichate tsa kalafo ea mocheso, lirekoto tsa NDE le liphetho tsa PMI ka mokhoa oo ho lumellanoeng ka oona. Bakeng sa merero e hahiloeng ho potoloha ASTM A213 T5,Pipe ea Octale fana ka li-tubing tse se nang moroko tse nang le mekhoa ea kalafo ea ho kobeha/mocheso-'me e ka hlophisa bopaki bo ikemetseng ha e kōptjoa e le hore bopaki ba boleng bo theohele ka makhethe tsamaisong ea mong'a eona ea QA/QC.

Q1: Tubing ea ASTM A213 T5 (ASME SA213 T5) e sebelisetsoa eng?
A1:Seamless 5Cr-0.5Mo ferritic alloy tubing bakeng sa liboiler, lihitara tse kholo, le li-heaters tsa mocheso o phahameng moo oxidation le ts'ebetso ea creep li bohlokoa.

Q2: Ke lokela ho khetha A213 T5 neng sebakeng sa T11/T22/T9?
A2:Kgetha T5 ha o hloka matla a hodimo-ho hanyetsa oxidation ya mocheso ho feta tlase{2}}limaraka tse tlase; nyolohela ho hodimo-Dikgetho tsa Cr ha mosebetsi o batla mocheso o phahameng/corrosion margin ho ya ka khoutu ya moralo.

Q3: Ke kopa eng ho netefatsa boleng ba tubing ea ASTM A213 T5 pele ke reka?
A3:Kopa 3.1 MTC e nang le nomoro ea mocheso,{1}}boemo ba kalafo, liphetho tsa chemistry/mechanical, NDE e hlokehang (hydrotest kapa tlhahlobo ea motlakase joalo ka ha ho boletsoe), li-dimensional checks, le traceability/matšoao ka botlalo.

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