Kusiyana pakati pemitemo nenzvimbo
GB/T 9948: Inoshanda kumapaipi esimbi asina musono mune mamiriro ekupisa kwepakati nepamusoro (≤500℃) akadai sekutsemuka kwepeturuuyemidziyo yemakemikari, uye ndeye yemuyero wepombi chaiyo.
GB/T 5310: Yakagadzirirwa zvakanangamabhoyira ane simba guru(zviyero zvemhepo ine mhute ≥9.8MPa), inosimbisa kuchengetedzeka kwenguva refu pasi pekupisa kwakanyanya uye kumanikidzwa kwakanyanya uye ndiyo chiyero chikuru chemachubhu eboiler.
Misiyano mikuru muzvinhu uye mashandiro
Kuumbwa kwemakemikari
Zvichienzaniswa nesimbi makumi maviri,20GSimbi ine simba guru rekudzora tsvina (yakadai seP≤0.025%, S≤0.015%), uye inoda kuti huwandu hwese hwezvinhu zvakasara (Cu, Cr, Ni, nezvimwewo) huve ≤0.70% kuti ive nechokwadi chekuti tembiricha yakakwira yagadzikana.
Hunhu hwemakanika
Simba rekudhonza re20G (410-550MPa) rinoita serinopindirana neresimbi ye20 (≥410MPa), asi 20G inofanirawo kuve nechokwadi chekuti simba rekutsungirira kupisa kwepamusoro-soro riri pa450℃ (≥110MPa), inova ndiyo chinhu chikuru chinodiwa pamachubhu eboiler.
Zvivako zvidiki
20G inofanirwa kuongororwa kuti ione kana pearlite iri spheroidization grade (≤ grade 4) kudzivirira kuora kwe microstructure mushure mekushandiswa kwenguva refu kwekupisa kwakanyanya, nepo 20G steel isina chinodiwa chakadaro.
Kusiyana kwemaitiro ekugadzira
Kurapa kupisa
20G inofanira kurapwa zviri nyore (Ac3+30℃) kuti ive nechokwadi chekuti saizi yegorosi iri pakati pe5-8. Simbi makumi maviri inogona kunyungudutswa kana kugadziriswa, uye kudzora mashandiro acho kwakasununguka.
Kuedza kusingakuvadzi
20G inoda kuonekwa kwezvikanganiso zve ultrasonic uye kuyedzwa kwe eddy current pachinhu chimwe nechimwe, nepo 20G simbi inowanzoda kuongororwa kwemasampuli chete.
Kuenzanisa kwemamiriro ekushandisa
20G: Maboira echiteshi chemagetsi (madziro anotonhodzwa nemvura, ma superheater), ma reactor ane makemikari ane simba rakawanda (mamiriro ezvinhu ane tembiricha yakagadzirwa > 350℃)
20 simbi: Mapaipi ekuisa magumbeze ekupisa mumafekitori, mapaipi emhepo uye mayuniti ekugadzira vacuum (tembiricha inowanzo < 350℃)
Zvinodiwa zveChitupa
Mapaipi esimbi e20G anofanirwa kuwana Special Equipment Manufacturing License (TS certification), uye batch yega yega inofanirwa kupa mushumo wekuyedza kushanda kwekupisa kwakanyanya. Mapaipi esimbi e20 anongoda chitupa chevimbiso yemhando yenguva dzose.
Mazano ekusarudza:
Kana zvasvika kumapurojekiti eASME kana PED certification, 20G inogona kuenderana neSA-106B/ASTM A192, nepo simbi makumi maviri isina hukama zvakananga nezvinhu zveAmerica.
Pamamiriro ekushanda ari pamusoro pe540℃, simbi dzesimbi dzakaita se12Cr1MoVG dzinofanira kufungwa nezvadzo. Muganho wepamusoro wekupisa kunoenderana ne20G i480℃ (chinhu chakakosha pakugadzira girafiti yesimbi yekabhoni).
Nguva yekutumira: Chivabvu-23-2025
