Uhlu lokuhlola lokuqinisekisa i-MTC lwabakhiqizi bezitsha zokucindezela abathenga insimbi ye-duplex 2205.

Ukuhlolwa kwe-MTC okusindisa izimpilo

Ukuqonda Ukwakheka Kwensimbi Engagqwali ye-Duplex 2205 kanye Nezakhiwo

Insimbi engagqwali ye-Duplex 2205, ebizwa ngokuthi i-UNS S31803/S32205, iyi-isigaba ezimbiliingxubevangeokuhlanganisa izici ezizuzisayo zombilii-austeniticfuthiinsimbi engagqwali ye-ferriticizakhiwo ezincane. Ukwakheka ngokuvamile kuqukethe cishe u-22%i-chromium, 5%i-nickel, 3% i-molybdenum, kanye ne-nitrogen engu-0.17%. Le khemistri elinganiswe kahle ikhiqiza isakhiwo esincane esinezilinganiso ezilinganayo zezigaba ze-austenite neze-ferrite, ngokuvamile sigcina okuqukethwe kwe-ferrite okungu-35% kuya ku-65%. Isakhiwo sezigaba ezimbili sinikeza cishe amandla okukhiqiza aphindwe kabili kunamazinga avamile e-austenitic ngenkathi sinikeza ukumelana okumangalisayoukugqwala, ikakhulukaziukugqwala kwemigodikanye nokuqhekeka kokugqwala ezindaweni ezithwala i-chloride.

Ngobaisitsha sokucindezelaabakhiqizi, ukuqonda lokhu kwakheka kubalulekile ngoba yonke into isebenzela injongo ethile yobunjiniyela. I-Chromium inikeza ifilimu ye-oxide engasebenzisi evimbela ukuhlaselwa ukugqwala. I-Nickel izinzisa isigaba se-austenite futhi inegalelo ekuqineni. I-Molybdenum ithuthukisa ukumelana nokufaka imigodi, okulinganiswe nge-Pitting Resistance Equivalent Number (PREN), ebalwa njenge-PREN ilingana no-%Cr kanye no-3.3 izikhathi %Mo kanye no-16 izikhathi %N. Ku-duplex 2205, i-PREN kufanele ibe cishe ngu-34 kuya ku-35, okudlula kakhulu i-PREN ejwayelekile engu-23 kuya ku-28 yeinsimbi engagqwali ye-austeniticamazinga afana no-316L. Ngokusho kwe-Imboni Yensimbi Ekhethekile YaseNyakatho Melika, lokhu kumelana okuphezulu kokufaka imigodi kwenza i-duplex 2205 ibe yinto ekhethwayo yezindawo zezimboni ezinolaka lapho amamaki avamile engahluleka khona ngaphambi kwesikhathi.

Izakhiwo zemishini ze-duplex 2205 ziyayihlukanisa kakhulu ne-single-phaseinsimbi engagqwaliamazinga. Amandla okukhiqiza amancane angu-450 MPa (65 ksi) kanye namandla okudonsa amancane angu-620 MPa (90 ksi) avumela onjiniyela ukuthi baklame imikhumbi yokucindezela odongeni emincane, banciphise izindleko zezinto zokwakha kanye nesisindo sokukhiqiza ngaphandle kokubeka engcupheni ukuphepha. Ukwandiswa okuncane okungu-25% kuqinisekisa ukuguquguquka okwanele kokwakheka,ukushisela, kanye nemisebenzi yokuhlola ingcindezi. Lezi zakhiwo zichazwe ku-ASTM A240 kanye ne-ASME SA-240, amazinga alawula izinto zepuleti lemithambo yokucindezela kuinsimbiimboni emhlabeni wonke.

Kungani Ukuqinisekiswa Kwesitifiketi Sokuhlolwa Kwesigayo Kubalulekile Emikhunjini Yokucindezela

Isitifiketi sokuhlolwa kwemishini yokugaya (i-MTC), esaziwa nangokuthi umbiko wokuhlolwa kwemishini yokugaya (i-MTR) noma umbiko wokuhlolwa kwezinto ezibonakalayo, yidokhumenti yokuqinisekisa ikhwalithi eqinisekisa iqembu elithile lemishini yokugaya (i-MTC).insimbi engagqwaliihlangabezana nencazelo yayo enqunyiwe. Kubakhiqizi bemikhumbi yokucindezela, i-MTC ingaphezu nje komthetho wokuphatha. Ubufakazi obuyinhloko bokuthi izinto ezinikeziwe zizosebenza ngokuphephile ngaphansi kwezingcindezi ezinkulu, amazinga okushisa, kanye nokuchayeka kwamakhemikhali okuhlangana nemikhumbi yokucindezela lapho isebenza. Isigaba II se-American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code (BPVC) siyala ukuthi zonke izinto ezisetshenziswa emikhumbi yokucindezela enesitembu sekhodi kumele zibhalwe ngokugcwele ngezitifiketi zokuhlola ezilandelekayo. Ngaphandle kwe-MTC eqinisekisiwe, imikhumbi yokucindezela ayikwazi ukuthola isitembu sayo se-ASME, futhi umenzi ubhekene nesibopho esingaba khona sokungalandeli imithetho.

Imiphumela yokwamukela ama-MTC angaqinisekisiwe noma angamanga ingaba yinhlekelele. Embonini yokucubungula amakhemikhali, isitsha sokucindezela esenziwe ngezinto ezingahlangabezani ngempela nezimfuneko ze-duplex 2205 singase sehluleke ngaphansi kokuqhekeka kokugqwala kwe-chloride stress zingakapheli izinyanga zokusebenza. Ezisetshenzisweni zikawoyela negesi, ikakhulukazi ezindaweni zesevisi ezimuncu eziqukethe i-hydrogen sulfide, izinto ezingahambisani neI-NACE MR0175Izidingo zokuqina zingaba nokuqhekeka kokucindezeleka kwe-sulfide, okuholela ekuqhekekeni okukhulu, ukungcoliswa kwemvelo, kanye nokulahlekelwa yimpilo. Lezi akuzona izingozi ezicatshangelwayo. I-National Board of Boiler and Pressure Vessel Inspectors ibika njalo izehlakalo ezilandelelwa emuva ekuhlulekeni kwesitifiketi sezinto ezibonakalayo, igcizelela ukubaluleka kokuqinisekiswa okuqinile kwe-MTC kukho konke ukushisa kwezinto ezingena esitolo sokukhiqiza.

Ukuthola ulwazi kwamanye amazwe kwandisa lezi zinselele zokuqinisekisa. Lapho abakhiqizi bemikhumbi yokucindezela bethenga i-duplex 2205 ezigayweni zaphesheya kwezilwandle, ikakhulukazi ezimakethe ezinezindinganiso zokulawula ikhwalithi ezahlukahlukene, ingozi yokuthola izinto ezinemibhalo engaphelele noma enganembile iyanda. Izithiyo zolimi, amafomethi esitifiketi angajwayelekile, kanye nebanga ukusuka egayweni lokukhiqiza konke kunegalelo enkingeni yokuqinisekisa. Yingakho nje ukwakha ubudlelwano nabahlinzeki abasobala nabagxile ekhwalithini kubalulekile. Abahlinzeki abadumile bafana nalabaWow Insimbi Engagqwalibayaqonda ukuthi ukunikeza izitifiketi zokuhlola umshini eziphelele neziqinisekisiwe akuyona nje inqubo enhle yebhizinisi kodwa kuyimfuneko eyisisekelo yokukhonza imboni yemikhumbi yokucindezela ngokuzibophezela. Umlando wabo obhaliwe wokuhlinzekai-duplex 2205 kubanjiniyela bezitshalo zokucubungula amakhemikhali eNyakatho Melikakubonisa izinga lokuqina kwesitifiketi okufanele abathengi bamazwe ngamazwe bakulindele.

Ukuqinisekiswa Kokwakheka Kwamakhemikhali: Okufanele Uhlole Kuwo Wonke Ama-MTC

Ingxenye yokwakheka kwamakhemikhali yesitifiketi sokuhlolwa kwemishini yokugaya iyindawo yokuqala nebaluleke kakhulu yokuhlola ukuqinisekiswa kwe-duplex 2205. I-MTC ngayinye kumele ibike kokubili ukuhlaziywa kokushisa kanye namanani okuhlaziywa komkhiqizo wezinto ezibalulekile zokuhlanganisa. Ukuhlaziywa kokushisa kumele ukwakheka okutholwe kumasampula athathwe ngesikhathi senqubo yokuncibilikisa noma yokubumba okuyinhloko, kuyilapho ukuhlaziywa komkhiqizo (okubizwa nangokuthi ukuhlaziywa kokuhlola) kwenziwa kumasampula athathwe epuletini eliqediwe, ishidi, noma ipayipi. Ku-duplex 2205, ukwakheka kwamakhemikhali ngokwe-ASTM A240 kumele kuwele ngaphakathi kwamabanga athile: i-chromium 22.0-23.0%, i-nickel 4.5-6.5%, i-molybdenum 3.0-3.5%, i-nitrogen 0.14-0.20%, ubuningi bekhabhoni 0.030%, ubuningi be-manganese 2.0%, ubuningi be-silicon 1.0%, ubuningi be-phosphorus 0.030%, kanye nobukhulu be-sulfur 0.020%. Ukubekezelelana kokuhlaziywa komkhiqizo kuvumela uhla olubanzi kancane kunokuhlaziywa kokushisa, kodwa ukuphambuka okuphawulekayo kubonisa izinkinga zezinto ezingaba khona.

Uma ubuyekeza ukwakheka kwamakhemikhali, qaphela kakhulu amanani e-chromium kanye ne-molybdenum, njengoba lezi zinto zinquma ngqo i-PREN kanye nokumelana nokugqwala kwezinto. Uma i-chromium iwela ngaphansi kuka-21.5% noma i-molybdenum yehla ngaphansi kuka-2.5% ekuhlaziyweni komkhiqizo, izinto zingase zingalethi ukumelana okulindelekile kwemigodi ezindaweni ze-chloride. Ngokufanayo, okuqukethwe yi-nitrogen ngaphansi kuka-0.14% kunganciphisa kakhulu amandla kanye nokumelana nokugqwala. Okuqukethwe yi-carbon kufanele kube ngaphansi kakhulu kuka-0.030%, ngokuvamile cishe ku-0.020% noma ngaphansi, njengoba i-carbon eningi ikhuthaza imvula ye-carbide emingceleni yokusanhlamvu ngesikhathiukushisela, kunciphisa indawo ethintekile ukushisa. Qondanisa la manani ngokuqhathanisa nezidingo eziku-Izindinganiso ze-ISOkanye nencazelo ethile yezinto ezibalulwe ku-oda lokuthenga ukuqinisekisa ukuthobela imithetho ngokugcwele.

Unjiniyela wekhwalithi onolwazi uzophinde afune ukuvumelana phakathi kokwakheka kwamakhemikhali okubikiwe kanye nezakhiwo zomshini. Uma ukwakheka kwamakhemikhali kubonisa okuqukethwe kwe-nickel okuphansi kakhulu kodwa ukuhlolwa komshini kubonisa okuqukethwe okuphezulu kakhulu kwe-ferrite, lokhu kusikisela ukuthi izinto kungenzeka ukuthi zincibilikisiwe ngendlela engafanele noma i-chemistry kungenzeka ukuthi ilungisiwe ngemva kokuhlaziywa kokushisa kokuqala. Noma yikuphi ukungahambisani phakathi kwe-chemistry nemiphumela yomshini kudinga uphenyo olwengeziwe, kufaka phakathi ukuhlolwa kwelabhorethri okuzimele kwamasampula ofakazi ngaphambi kokuba izinto zingene ekwakhiweni kwemithambo yokucindezela.

Izakhiwo Zomshini Nezidingo Zokuqina Kwesevisi Yesitsha Sokucindezela

Ingxenye yezakhiwo zomshini zesitifiketi sokuhlola se-duplex 2205 mill kumele ibonise ukuthi izinto zihlangabezana noma zidlula izidingo ezincane ezichazwe ku-ASTM A240 kanye ne-ASME SA-240. Kwipuleti lensimbi engagqwali le-duplex 2205, lezi zimbalwa yilezi: amandla okukhipha isivuno angama-0.2% angama-450 MPa (65 ksi), amandla okugcina okudonsa angama-620 MPa (90 ksi), kanye nokwelulwa ngama-50 mm angama-25%. Lezi zakhiwo zibonisa umphumela wokuqinisa wesakhiwo esincane sesigaba esiphindwe kabili kanye nokwengezwa kwe-nitrogen. Abakhiqizi bemikhumbi yokucindezela kufanele baphawule noma iyiphi i-MTC lapho amanani abikiwe ewela ngaphakathi kwama-5% emikhawulo yencazelo encane, njengoba lokhu kungabonisa ukuthi izinto ziseduze nomngcele wekhwalithi eyamukelekayo futhi zingaziphatha ngendlela engalindelekile ngesikhathi sokwakheka kanyeukushiselaimisebenzi.

Ukuhlolwa kokuqina kungenye iphuzu elibalulekile lokuqinisekisa. Kuzinhlelo zokusebenza ezijwayelekile ze-duplex 2205, ubulukhuni obukhulu akufanele budlule i-31 HRC (310 HBW noma i-332 HV). Kodwa-ke, kuzinhlelo zokusebenza zesevisi emuncu ezilawulwa yiI-NACE MR0175/ISO 15156, ubulukhuni obukhulu bukhawulelwe ku-28 HRC (285 HBW). I-MTC kumele isho ngokucacile indlela yokuhlola ubulukhuni esetshenzisiwe (i-Rockwell, i-Brinell, noma i-Vickers) kanye nendawo yokuhlola. Kwezinto zepuleti, ubulukhuni buvame ukulinganiswa phakathi nobukhulu. Uma i-MTC ibika amanani obulukhuni ngaphandle kokucacisa indlela yokuhlola, indawo, noma isikali, lokhu kuyisibonakaliso esibalulekile okufanele sikhuthaze ukwenqatshwa noma ukuhlolwa kabusha kwezinto ngaphambi kokuba kuqale ukwenziwa kwemithambo yokucindezela.

Ukuhlolwa komthelela we-Charpy V-notch kunikeza idatha ebalulekile mayelana nokuqina kwezinto, ikakhulukazi emazingeni okushisa aphansi. Ngenkathi i-duplex 2205 ivame ukubonisa ukuqina okuhle kakhulu kuze kufike ku-minus 50 degrees Celsius, i-MTC kufanele ifake imiphumela yokuhlolwa komthelela ekushiseni okuchazwe yikhodi yokuklama isikebhe sokucindezela. Imininingwane evamile idinga amanani amancane wamandla adonswayo angu-27 J (20 ft-lbf) kumasampula ajikelezayo. Emikhunjini yokucindezela esebenza ezindaweni ezibandayo noma ephatha uketshezi lwe-cryogenic, ukuhlolwa komthelela ekushiseni okuncane komklamo kuyimpoqo. Qinisekisa ukuthi amasampula okuhlola athathwe ngendlela efanele maqondana nesiqondiso sokugoqa, njengoba lokhu kuthinta kakhulu amanani abikiwe.ingxubevangeukwakheka kanye nebhalansi yesakhiwo kuthinta ngqo lezi zakhiwo, okwenza ukubuyekezwa okuphelele kwe-MTC kubaluleke kakhulu.

Amafulegi Abomvu: Ukuhlonza Izitifiketi Zokuhlolwa Komshini Wokukhohlisa Noma Onganembile

Ukuqaphela amafulegi abomvu ezitifiketi zokuhlolwa kwemishini kuyikhono okumele wonke umenzi wemikhumbi yokucindezela alithuthukise ukuze avikele ibhizinisi lakhe kanye nabasebenzisi bakhe bokugcina. Ifulegi elibomvu elisobala kakhulu inombolo yokushisa engekho noma engafundeki. I-MTC ngayinye esemthethweni kumele ifake inombolo yokushisa ehlukile elandelela impahla emuva ekuncibilikeni kwayo okuthile. Le nombolo yokushisa kufanele futhi ifakwe isitembu noma imakwe ngokoqobo ezintweni ngokwazo, futhi okubili kumele kufane. Uma inombolo yokushisa ye-MTC ingahambisani nezimpawu ezisepuletini noma epayipini, izinto kumele zihlukaniswe kuze kube yilapho ukungafani sekuxazululiwe. Abanye abahlinzeki abakhohlisayo bazohlinzeka ngama-MTC kusuka ekushiseni okukodwa kwezinto ngenkathi empeleni bethumela izinto kusuka ekushiseni okuhlukile, okuphansi.

Esinye isibonakaliso esibalulekile yilapho wonke amanani amakhemikhali namakhemikhali abikiwe ehlangana ngqo noma eduze kakhulu nemikhawulo yencazelo encane noma ephezulu. Nakuba kungenzeka ngokwezibalo ukuthi amanani awele emingceleni yencazelo, akunakwenzeka ukuthi yonke into eyodwa nayo yonke impahla yemishini ingakwenza lokho ngesikhathi esisodwa ku-MTC efanayo. Leli phethini livame ukukhombisa ukuthi i-MTC yenziwe kunokuba ithathwe ekuhlolweni kwangempela. Ngokufanayo, qaphela ama-MTC lapho izakhiwo zemishini zibonisa amanani aphezulu ngokungavamile adlula kakhulu amanani amancane encazelo. Ngenkathi amandla aphezulu angase abonakale efiseleka, amandla aphezulu kakhulu esivuno ku-duplex 2205 angabonisa okuqukethwe okuphezulu kwe-ferrite, okunciphisa ukuqina kanye nokushibilika. Ama-MTC angempela avela ezigayweni ezidumile ngokuvamile abonisa amanani asatshalaliswa ngokwemvelo ngaphakathi kobubanzi bencazelo.

Ukungabikho kwesitifiketi selabhorethri yomuntu wesithathu kuyisibonakaliso esiyisixwayiso. Ngezicelo zemikhumbi yokucindezela ebalulekile, ikakhulukazi lezo ezihloselwe ukusetshenzwa ku-oyela negesi, ukucubungula amakhemikhali, noma izindawo zokukhipha usawoti emanzini, i-MTC kufanele ihambisane nemibiko yokuhlola evela kuma-laboratory azimele agunyaziwe. Amafektri ahloniphekile avame ukusebenzisana nezinhlangano ezifana ne-SGS, i-Bureau Veritas, i-Lloyd's Register, noma i-TUV ukuze abone ukuhlolwa nokuqinisekisa imiphumela. Uma umhlinzeki engakwazi ukunikeza imibhalo yokuhlola yomuntu wesithathu, noma uma izitifiketi zomuntu wesithathu zibhekisela enombolweni yokushisa ehlukile kune-MTC, qaphela kakhulu. Njalo qinisekisa isimo sokugunyazwa kwanoma yiliphi ilabhorethri yomuntu wesithathu ekhonjwe esitifiketini, bese ubhekisela idatha ngokumelene nohlu oluphelele lomkhiqizo olutholakala kubahlinzeki abasunguliwe abafana nalaba.Wow Insimbi Engagqwali, abagcina amadokhumenti aphelele ekhwalithi yaboinsimbi engagqwaliimigqa yomkhiqizo.

Indlela Yokuqinisekisa Ubuqiniso be-MTC kanye Nokulandelela Izinto

Ukuqinisekisa isitifiketi sokuhlola umshini wokugaya kudinga indlela ehlelekile edlula nje ukufunda idokhumenti. Isinyathelo sokuqala ukuxhumana nomshini wokugaya okhiqizayo ngqo usebenzisa ulwazi lokuxhumana olutholwe ngokuzimela, hhayi ku-MTC uqobo noma kumhlinzeki olwethulayo. Shayela umnyango wokuqinisekisa ikhwalithi womshini wokugaya bese unikeza inombolo yokushisa, imininingwane yomkhiqizo, kanye nosuku lokwenziwa. Bacele ukuthi baqinisekise ukuthi i-MTC onayo iyahambisana namarekhodi abo. Izimboni eziningi zanamuhla, ikakhulukazi lezo eziseYurophu, eJapane, eNingizimu Korea, kanye nabakhiqizi baseShayina abasunguliwe, zigcina izizindalwazi zokulandelela eziku-inthanethi lapho abathengi bangaqinisekisa khona izinombolo zokushisa ngesikhathi sangempela. Lokhu kuqinisekiswa okuqondile nomshini wokugaya kuyindlela eyodwa ephumelela kakhulu yokuqinisekisa ubuqiniso be-MTC.

Isinyathelo sesibili sokuqinisekisa sihilela ukucela imibiko yokuhlolwa eyengeziwe eqinisekisa idatha eyinhloko ye-MTC. Ukuze uthole izinto zomshini wokucindezela we-duplex 2205, cela imibiko yokuhlolwa kwe-ultrasonic (UT) ngokwe-ASTM A578, izitifiketi zokuhlolwa kokugqwala ngokwe-ASTM A923 (ehlola ngqo ukufaneleka kwezakhiwo ezincane ze-duplex), kanye nemibiko yokuhlola enobukhulu eqinisekisa ukujiya, ububanzi, kanye nokubekezelelana kobude. Qondanisa imiphumela ye-UT ne-MTC ukuqinisekisa ukuthi azikho iziphambeko zangaphakathi. Indlela yokuhlola ye-ASTM A923 ithola ngqo izigaba ze-intermetallic ezifana nesigaba se-sigma ezingakheka ngesikhathi sokwelashwa okungalungile kokushisa futhi zonakalise kakhulu kokubili ukumelana nokugqwala kanye nokuqina kwe-duplex.insimbi engagqwali.

Okokugcina, qhathanisa idatha ye-MTC nemiphumela evela kumaqoqo angaphambilini e-duplex 2205 avela kumshini ofanayo kanye nomhlinzeki ofanayo. Misa isizindalwazi somlando sokwakheka kwamakhemikhali, izakhiwo zemishini, kanye nemiphumela yokuhlola. Amanani ahambisanayo phakathi kokushisa okuningi abonisa inqubo yokukhiqiza ezinzile, elawulwa kahle. Izinguquko ezingazelelwe ekubunjweni noma izakhiwo phakathi kwamaqoqo, noma ngabe womabili ahlangabezana nemininingwane, zingase zibonise izinguquko ekutholakaleni kwezinto zokusetshenziswa, ukuguqulwa kwenqubo yokukhiqiza, noma izinkinga zokulawula ikhwalithi kumshini. Kubakhiqizi bemikhumbi yokucindezela abathenga kwamanye amazwe, ukwakha le datha yomlando kudinga ukuzithiba kodwa kunikeza isivikelo esibalulekile ekutholeni izinto ezingaphansi kwezindinganiso. Cabanga ngokubandakanya isazi sensimbi esifanelekayo noma unjiniyela wezinto ukuze abukeze ama-MTC ukuze athole ama-oda anenani eliphezulu noma abalulekile ekuphepheni, ikakhulukazi lapho esebenza nabaphakeli abasha okokuqala.

I-Duplex 2205 vs 316L vs Super Duplex 2507: Ukukhetha Ibanga Elifanele

Onjiniyela bemikhumbi yokucindezela bavame ukubhekana nesinqumo sokuthi yikuphiinsimbi engagqwaliizinga lokucacisa isicelo esithile. Amabanga amathathu avame ukucatshangelwa ensizakalo yokugqwala yi-316L austenitic stainless steel, i-duplex 2205, kanye ne-super duplex 2507. Ibanga ngalinye linikeza izinzuzo nemikhawulo ehlukile okumele ihlolwe ngokuhambisana nezimo zokusebenza ezithile zesitsha sokucindezela. Ukuqonda lo mehluko kubalulekile ekwenzeni ukukhetha izinto ezingabizi kakhulu eziqinisekisa ukuthembeka kwensizakalo yesikhathi eside. Ngokusho kwe-I-SSINA, ukukhetha ibanga kuncike endaweni egqwalisayo, izinga lokushisa lokusebenza, izidingo zokucindezela, kanye nokuphila kwesikhathi senkonzo okulindelekile kwemishini.

Ibanga 316L liyi-austenitic engasebenzi kahleinsimbi engagqwaliezindaweni ezingcolisa ngokulinganayo. Njengoba ine-chromium engaba ngu-16-18%, i-nickel engu-10-14%, kanye ne-molybdenum engu-2-3%, i-316L inikeza ukumelana okuhle kokugqwala kanye nokwakheka okuhle kakhulu kanye nokushibilika. Kodwa-ke, i-PREN yayo engaba ngu-23-26 yenza ukuthi ikwazi ukugqwala ngenxa yomgodi kanye nokuqhekeka ezindaweni ezigcwele i-chloride, ikakhulukazi emazingeni okushisa angaphezu kwama-degree Celsius angu-50. Amandla ayo okukhiqiza angaba ngu-170-205 MPa cishe ayingxenye eyodwa kwezintathu kune-duplex 2205, edinga izindonga zemithambo emikhulu ukuze kulinganiswe ingcindezi efanayo. Ibanga 316L lihlala liyisinqumo esifanele sokucubungula amakhemikhali okuphakathi, ukudla neziphuzo, imithi, kanye nezicelo zokwakha lapho amazinga e-chloride ephansi futhi ukulungiswa kwezindleko kubalulekile.

I-Duplex 2205 ithatha indawo ephakathi, inikeza cishe amandla okukhiqiza aphindwe kabili angu-316L kanye ne-PREN engu-34-35, okwenza ifaneleke ezindaweni ezicebile nge-chloride ezindaweni zokucubungula amakhemikhali, izindawo zokukhiqiza uwoyela negesi, izimboni zokukhipha usawoti emanzini, kanye nemishini yokugaya usawoti kanye nephepha. Okuqukethwe kwe-nickel okuphansi uma kuqhathaniswa ne-316L nakho kunikeza ukuzinza okukhulu kwentengo, njengoba amanani e-nickel angaba nokuguquguquka. I-Super duplex 2507, ene-chromium engaba ngu-25%, i-nickel engu-7%, kanye ne-molybdenum engu-4%, inikeza i-PREN engaphezu kuka-40 futhi kufanele ichazwe kuphela lapho izimo zokusebenza zidlula amandla e-duplex 2205. Lokhu kufaka phakathi imidiya ye-chloride egxile kakhulu, amazinga okushisa angaphezu kwama-degree Celsius angu-60 emanzini olwandle, izindawo ezijulile zasogwini, kanye nokucubungula i-acid enamandla. Kodwa-ke, i-super duplex 2507 idinga izinqubo zokushisela eziqinile, izilawuli zokwelashwa kokushisa eziqinile, kanye nezindleko zezinto eziphezulu, okwenza i-duplex 2205 ibe ukukhetha kobunjiniyela okuthandwayo kweningi lezicelo zemikhumbi yokucindezela yezimboni emhlabeni jikelele.

Izicelo Zomhlaba Wangempela: Lapho i-Duplex 2205 Pressure Vessels Excel

Ukufakwa okusebenzayo kwensimbi engagqwali ye-duplex 2205 ekwakhiweni kwemikhumbi yokucindezela kuhlanganisa izimboni eziningi ezisindayo lapho kuhlangana khona imithombo ebolile kanye nokucindezela okuphezulu. Ezitshalweni zokucubungula amakhemikhali kulo lonke iGulf Coast yase-United States, ikakhulukazi emzileni wezimboni waseHouston, i-duplex 2205 isibe yinto ejwayelekile yama-reactor, amakholomu, ama-heat exchanger, kanye nemikhumbi yokugcina ephatha imifudlana yenqubo ecebile nge-chloride. Isitshalo samakhemikhali eHouston esichaza i-duplex 2205 sendawo entsha yokukhiqiza i-organic chloride sibike ukwanda kwesikhathi senkonzo okulindelwe okungaphezu kuka-300% uma kuqhathaniswa nemikhumbi engu-316L esetshenziswe ngaphambilini, eyayidinga ukushintshwa njalo eminyakeni emithathu kuya kwemihlanu ngenxa yokuqhekeka kwemigodi kanye nokugqwala kokucindezeleka. Izindleko zokuqala eziphezulu ze-duplex 2205 zancishiswa ngaphakathi komjikelezo wokuqala wokusebenza ngokuqeda ukuvalwa okungahleliwe kanye nezindleko zokulungisa eziphuthumayo.

Amapulatifomu kawoyela negesi asogwini lolwandle eNorth Sea amelela esinye isicelo esibalulekile semikhumbi yokucindezela ye-duplex 2205. Ukuhlanganiswa kokuchayeka emanzini olwandle, i-hydrogen sulfide koketshezi olukhiqizwayo, ukucindezela okuphezulu, kanye namazinga okushisa aphansi kudala enye yezindawo zesevisi ezidinga kakhulu kunoma iyiphi impahla yobunjiniyela. Abaqhubi beNorth Sea bamise i-duplex 2205 kuzinhlelo zokuphatha amanzi olwandle, abahlukanisi bezinqubo, kanye nemikhumbi yokwelapha amanzi ekhiqizwayo. Ukumelana kwezinto ezisetshenziswayo ekuqhekekeni kokugqwala kwe-chloride kanye nokuhambisana kwayo ne-I-NACE MR0175Izidingo zesevisi ethambile zenza ifaneleke ngokukhethekile kulezi zinhlelo zokusebenza. Izinqubo zokushisela zemikhumbi ye-North Sea duplex 2205 kumele zihambisane nezidingo zekhwalithi eqinile, okuhlanganisa ukufakwa kokushisa okulawulwayo, imikhawulo yokushisa phakathi kwe-interpass, kanye nokuqinisekiswa kokuqukethwe kwe-ferrite ngemuva kokushisela ukuqinisekisa ukuthi amalunga ashiselwe asebenza ngokulinganayo nezinto eziyinhloko.

Izitshalo zokususa usawoti eMpumalanga Ephakathi, ikakhulukazi eSaudi Arabia nase-United Arab Emirates, zisebenzise i-duplex 2205 yokukhipha amapayipi anomfutho ophezulu, imikhumbi ye-flash, kanye nemikhumbi yokucindezela i-reverse osmosis. Ukuhlushwa okuphezulu kakhulu kwe-chloride emanzini olwandle ase-Arabian Gulf (cishe ama-45,000-50,000 mg/L wonke ama-solids ancibilikisiwe) kuhlanganiswe namazinga okushisa okusebenza angu-40-55 degrees Celsius ezinqubweni zokususa usawoti ezishisayo kwenza ama-316L angafaneleki ngenxa yokuhlasela okusheshayo kwemigodi. I-Duplex 2205 inikeza ukumelana nokugqwala okudingekayo ngenkathi ivumela izindonga zemikhumbi ezincane ngenxa yamandla ayo aphezulu okusebenza, okunciphisa kokubili izindleko zezinto zokwakha kanye nokukhiqiza. Imboni ye-pulp nephepha eScandinavia naseNingizimu Melika nayo ithembele kakhulu ku-duplex 2205 yama-digesters, ama-bleach washers, kanye nemikhumbi yokubuyisa amakhemikhali lapho ukumelana notshwala obuqukethe i-acidic chloride kubalulekile khona ukuze kuqhubeke ukusebenza.

Ukuthola Izindlela Ezinhle Kakhulu Zabakhiqizi Bemikhumbi Ecindezelayo

Ukusungula uhlelo oluqinile lokufaneleka komhlinzeki kuyisisekelo sokuthola ngempumelelo i-duplex 2205 yokwenziwa kwemikhumbi yokucindezela. Qala ngokuqinisekisa ukuthi umshini wokukhiqiza unezitifiketi zamanje zezinhlelo zokuphatha ikhwalithi ze-ISO 9001 futhi, lapho kufanele khona, izitifiketi ezithile zemboni ezifana nokuvunyelwa kwe-PED (Pressure Equipment Directive), i-NADCAP, noma izitifiketi zekhwalithi yenuzi. Cela uhlelo oluphelele lwekhwalithi noma uhlelo lwekhwalithi oluvela kumshini wokugaya olubhala phansi izinqubo zabo zokuhlola nokuhlola zamabanga e-duplex. Hlola ikhono lomshini wokugaya ukwenza zonke izivivinyo ezidingekayo endlini, kufaka phakathi ukuhlaziywa kwamakhemikhali (i-optical emission spectroscopy noma i-XRF), ukuhlolwa komshini (ukuqina, ubulukhuni, umthelela), ukuhlolwa kokugqwala (ASTM A923), kanye nokuhlolwa okungonakalisi (ukuhlolwa kwe-ultrasonic). Imishini yokugaya okumele inikeze ngaphandle izivivinyo ezibucayi ingase ilethe ukubambezeleka kanye nezidingo ezengeziwe zemibhalo yochungechunge lokugcina.

Uma ubeka ama-oda okuthenga ezinto zomkhumbi we-duplex 2205, faka izidingo ezicacile zokuqukethwe kwe-MTC kanye nefomethi. Cacisa ukuthi i-MTC kumele ikhishwe ngokuhambisana ne-EN 10204 Type 3.1 (isitifiketi sokuhlola esivela kumkhiqizi) noma Uhlobo 3.2 (isitifiketi sokuhlola esiqinisekiswe yinhlangano ezimele), kuye ngokubaluleka kwesicelo. Emikhumbini ene-ASME code stamp, i-EN 10204 Type 3.1 iyisidingo esincane kakhulu. Emisebenzini yolwandle, yenuzi, noma eminye imiphumela ephezulu, kunconywa isitifiketi sohlobo 3.2 ngokuhlolwa kofakazi beqembu lesithathu. Chaza ngokucacile imininingwane yezinto ezisebenzayo (ASTM A240, ASME SA-240, noma okulinganayo), izindlela zokuhlola ezidingekayo, ukuqondiswa kwesampula, kanye nemigomo yokwamukelwa kuyo yonke i-oda lokuthenga. Ukungacaci kwemininingwane yokuthenga kuwumthombo ovame kakhulu wezingxabano ze-MTC phakathi kwabakhiqizi nabaphakeli.

Ukwakha ubudlelwano besikhathi eside nabahlinzeki be-duplex 2205 abafanelekayo kunikeza izinzuzo ezibalulekile maqondana nokungaguquguquki, ukuthembeka, kanye nokusekelwa kobuchwepheshe.Wow Insimbi EngagqwaliI-Ningbo, eChina, idumele ngokuhlinzeka ngezinto eziqinisekisiwe ngemibhalo ephelele yabathengi bamazwe ngamazwe. Uhla lwemikhiqizo yabo aluhlanganisi nje kuphela amamaki amabili kodwa futhi nokukhethwa okuphelele kwe-austenitic ne-ferriticinsimbi engagqwaliamakhoyili, imichilo, namashidi emazingeni afana no-304, 316L, 430, 409, kanye no-201, atholakala ngemishini yabo.ikhathalogi yemikhiqizo. Kubakhiqizi bemikhumbi yokucindezela abahlola abahlinzeki abasha, qala ngohlelo lokuhlola olulinganiselwe, bafake izinto ezitholiwe ekuhlolweni kokuqinisekiswa okuzimele, bese behlola amadokhumenti e-MTC kahle ngaphambi kokuzibophezela ekuthengeni okukhulu. Le ndlela ehlelekile yokufaneleka komhlinzeki ivikela kokubili umenzi kanye nabasebenzisi bokugcina abathembele ekuthembekeni kwayo yonke imikhumbi yokucindezela esetshenziswayo.