Umahluko phakathi kwemigangatho kunye nokumiswa
GB/T 9948: Isebenza kwimibhobho yentsimbi engenamthungo kwimeko ephakathi kunye nobushushu obuphezulu (≤500 ℃) njengeukuqhekeka kwepetroleumkwayeizixhobo zekhemikhali, kwaye iphantsi komgangatho okhethekileyo wombhobho.
GB/T 5310: Yenzelwe ngokukodwaiibhoyili zoxinzelelo oluphezulu(iiparamitha ze-steam ≥9.8MPa), igxininisa ukhuseleko lwexesha elide phantsi kobushushu obuphezulu kunye noxinzelelo oluphezulu kunye nomgangatho ongundoqo we-boiler tubes.
Umahluko ophambili kwizinto eziphathekayo kunye nokusebenza
Ukuqulunqwa kweekhemikhali
Xa kuthelekiswa nentsimbi engama-20,20Gintsimbi inolawulo olungqongqo phezu kokungcola (okufana ne-P≤0.025%, S≤0.015%), kwaye idinga inani elipheleleyo lezinto ezishiyekileyo (Cu, Cr, Ni, njl.) ukuba ≤0.70% ukuqinisekisa ukuzinza okuphezulu kobushushu.
Iimpawu zoomatshini
Amandla obushushu begumbi le-20G (410-550MPa) abonakala ehambelana nentsimbi ye-20 (≥410MPa), kodwa i-20G idinga ukongeza iqinisekisa amandla okunyamezela kobushushu obuphezulu kwi-450℃ (≥110MPa), eyona mfuneko ingundoqo kwiibhoyili.
Microstructure
I-20G kufuneka ihlolwe ibakala le-spheroidization ye-pearlite (≤ ibakala lesi-4) ukukhusela ukuwohloka kwe-microstructure emva kwenkonzo yexesha elide lobushushu obuphezulu, ngelixa i-20G yensimbi ayinayo imfuneko enjalo.
Umahluko wenkqubo yokuvelisa
Unyango lobushushu
I-20G kufuneka ithathe unyango oluqhelekileyo (Ac3 + 30℃) ukuqinisekisa ubungakanani bengqolowa yebakala 5-8. Intsimbi ye-20 inokukhutshwa okanye iqheleke, kwaye ulawulo lwenkqubo lukhululekile.
Uvavanyo olungonakalisi
I-20G ifuna ukufunyanwa kwempazamo ye-ultrasonic yomntu kunye novavanyo lwangoku lwe-eddy kwiqhekeza ngalinye, ngelixa i-20G yentsimbi idla ngokufuna ukuhlolwa kwesampulu.
Ukuthelekiswa kweemeko zesicelo
20G: Iibhoyila zesikhululo samandla (iindonga ezipholiswe ngamanzi, izifudumezi ezinkulu), ii-reactors ezinoxinzelelo oluphezulu lwekhemikhali (iimeko ezinobushushu boyilo> 350℃)
20 intsimbi: Imibhobho yetyhubhu yokufudumeza iziko kwiindawo zokucokisa, imibhobho ye-atmospheric kunye ne-vacuum distillation units (iqondo lobushushu lidla ngokuba <350℃)
IiMfuno zeSiqinisekiso
Iipayipi zensimbi ze-20G kufuneka zifumane iLayisensi yoMveliso weZixhobo eziKhethekileyo (i-TS certification), kwaye ibhetshi nganye kufuneka inike ingxelo yokuvavanya ukusebenza okuphezulu. Intsimbi ye-20 ifuna kuphela isatifikethi somgangatho wesiqinisekiso esiqhelekileyo.
Iingcebiso zokukhetha:
Xa kuziwa kwiiprojekthi ze-ASME okanye ze-PED zesatifikethi, i-20G inokuhambelana nayoSA-106B/ ASTM A192, ngelixa i-20 insimbi ayinayo imbalelwano ngokuthe ngqo kwizinto eziqhelekileyo zaseMelika.
Kwiimeko zokusebenza ezingaphezulu kwe-540 ℃, iintsimbi ze-alloy ezifana ne-12Cr1MoVG kufuneka ziqwalaselwe. Umda ophezulu wokushisa okusebenzayo kwi-20G yi-480 ℃ (indawo ebalulekileyo ye-graphitization ye-carbon steel).
Ixesha lokuposa: May-23-2025
