Umehluko phakathi kwamazinga kanye nokuma
I-GB/T 9948: Isebenza kumapayipi ensimbi angenamthungo kuzimo ezimaphakathi neziphezulu lokushisa (≤500℃) njengeukuqhekeka kwe-petroleumfuthiimishini yamakhemikhali, futhi ingeyezinga lepayipi elikhethekile.
I-GB/T 5310: Idizayinelwe ngokukhethekileama-boilers anengcindezi ephezulu(amapharamitha omusi ≥9.8MPa), igcizelela ukuphepha kwesikhathi eside ngaphansi kwezinga lokushisa eliphezulu nokucindezela okuphezulu futhi iyindinganiso eyinhloko yamashubhu okubhayela.
Umehluko oyinhloko ezintweni kanye nokusebenza
Ukwakheka kwamakhemikhali
Uma kuqhathaniswa nensimbi engama-20,20Ginsimbi inokulawula okuqinile phezu kokungcola (okufana no-P≤0.025%, S≤0.015%), futhi idinga inani eliphelele lezinto ezisele (Cu, Cr, Ni, njll.) ukuba zibe ≤0.70% ukuze kuqinisekiswe ukuzinza kwezinga lokushisa eliphezulu.
Izakhiwo zemishini
Amandla ezinga lokushisa legumbi angu-20G (410-550MPa) abonakala edlulana nalawo ensimbi engu-20 (≥410MPa), kodwa i-20G idinga ukuqinisekisa ngokungeziwe amandla okumelana nezinga lokushisa eliphezulu ku-450℃ (≥110MPa), okuyimfuneko eyinhloko yamashubhu obhayela.
I-Microstructure
I-20G idinga ukuhlolwa ngebanga le-spheroidization le-pearlite (≤ grade 4) ukuvimbela ukuwohloka kwe-microstructure ngemva kwesevisi yesikhathi eside yezinga lokushisa eliphezulu, kuyilapho i-20G steel ingenayo imfuneko enjalo.
Umehluko wenqubo yokukhiqiza
Ukwelashwa kokushisa
I-20G kufanele ithole ukwelashwa okujwayelekile (Ac3+30℃) ukuze kuqinisekiswe usayizi wokusanhlamvu webanga lesi-5-8. Insimbi engama-20 ingabanjwa noma ijwayeleke, futhi ukulawulwa kwenqubo kukhululekile.
Ukuhlola okungabhubhisi
I-20G idinga ukutholwa kwephutha kwe-ultrasonic ngayinye kanye nokuhlolwa kwamanje kwe-eddy kucezu ngalunye, kuyilapho insimbi engu-20G ngokuvamile idinga ukuhlolwa kwesampula kuphela.
Ukuqhathaniswa kwezimo zohlelo lokusebenza
20G: Amabhoyela esiteshi samandla kagesi (izindonga ezipholiswe ngamanzi, izifudumezi ezinkulu), ama-reactors amakhemikhali aphezulu (izimo ezinamazinga okushisa edizayini> 350℃)
20 insimbi: Izinqwaba zamashubhu zokushisisa izithando zomlilo ezindaweni zokucwenga, amapayipi amayunithi e-atmospheric kanye ne-vacuum distillation (izinga lokushisa livamise ukuba <350℃)
Izidingo zesitifiketi
Amapayipi ensimbi angu-20G adinga ukuthola Ilayisensi Yokukhiqiza Izisetshenziswa Ezikhethekile (isitifiketi se-TS), futhi iqoqo ngalinye kufanele linikeze umbiko wokuhlola ukusebenza kwezinga lokushisa eliphezulu. Insimbi engama-20 idinga kuphela isitifiketi esijwayelekile sekhwalithi.
Iziphakamiso zokukhetha:
Uma kuziwa kumaphrojekthi wokuqinisekisa we-ASME noma we-PED, i-20G ingahambisana nayoI-SA-106B/ ASTM A192, kuyilapho insimbi engu-20 ingenakho ukuxhumana okuqondile nezinto ezijwayelekile zaseMelika.
Ezimweni zokusebenza ezingaphezu kuka-540 ℃, izinsimbi ze-alloy ezifana ne-12Cr1MoVG kufanele zicatshangelwe. Umkhawulo ophezulu wezinga lokushisa elisebenzayo le-20G yi-480 ℃ (iphuzu elibalulekile le-graphitization ye-carbon steel).
Isikhathi sokuthumela: May-23-2025
