Uxinzelelo lwe-Nominal (PN), i-Class American standard level pound level ( Lb ), yindlela yokubonakalisa uxinzelelo, umahluko kukuba uxinzelelo abamele luhambelana nobushushu obuhlukeneyo bereferensi, inkqubo ye-PN yaseYurophu ibhekisela kuxinzelelo lwe-120 ° C Uxinzelelo oluhambelanayo, ngelixa i-CLAss American Standard ibhekisela kuxinzelelo oluhambelanayo kwi-425.5 ° C. Ngoko ke, kwi-conversion enokwenzeka yokutshintsha ngokulula, i-conversion ayinakwenzeka. Umzekelo, i-CLAss300 kufuneka ibe yi-2.1MPa ngokuguqulwa koxinzelelo olulula. Nangona kunjalo, ukuba ukushisa okusebenzayo kuqwalaselwa, uxinzelelo oluhambelanayo luya kunyuka. Ngokutsho kobushushu kunye novavanyo lokumelana noxinzelelo lwezinto Umlinganiselo ulingana ne-5.0MPa.
Kukho iintlobo ezimbini zeenkqubo zevalve: enye yinkqubo "yoxinzelelo oluncinci" emelwe yiJamani (kuquka iChina) ngokusekelwe kuxinzelelo oluvumelekileyo lokusebenza kwiqondo lokushisa lokushisa (i-100 degrees kwilizwe lam kunye ne-120 degrees eJamani). Enye "yinkqubo yobushushu kunye noxinzelelo" emelwe yi-United States, emelwe yingcinezelo yokusebenza evumelekileyo kwiqondo lokushisa elithile. Kwiqondo lokushisa kunye noxinzelelo lwe-United States, ngaphandle kwe-150Lb, esekelwe kwii-degrees ezingama-260, amanye amanqanaba asekelwe kwi-454 degrees. . Uxinzelelo oluvumelekileyo lweklasi ye-150-psi (150psi = 1MPa) Inombolo ye-25 carbon steel valve yi-1MPa kwii-degrees ezingama-260, kwaye uxinzelelo oluvumelekileyo kwiqondo lokushisa likhulu kakhulu kune-1MPa, malunga ne-2.0MPa. Ngoko ke, ukuthetha ngokuqhelekileyo, inqanaba loxinzelelo lwegama elihambelana ne-American Standard 150Lb yi-2.0MPa, kwaye inqanaba loxinzelelo lwegama elihambelana ne-300Lb ngu-5.0MPa, njl.
I-PN yikhowudi enxulumene noxinzelelo olumelwe ngamanani, kwaye iyinani elijikelezileyo elilungele ireferensi. I-PN linani le-MPa elimelana noxinzelelo malunga nokulingana nobushushu obuqhelekileyo, oluluxinzelelo oluqhelekileyo oludla ngokusetyenziswaIivalvu zaseTshayina. Kuba iivalvu zolawulo ngecarbon steel valveimizimba, ibhekisa kuxinzelelo oluphezulu oluvumelekileyo lokusebenza xa isetyenziswe ngaphantsi kwe-200 ° C; kwimizimba yevalvu yentsimbi, ibhekisa kuxinzelelo oluphezulu oluvumelekileyo lokusebenza xa isetyenziswe ngaphantsi kwe-120°C; Ubuninzi boxinzelelo lokusebenza oluvumelekileyo kwizicelo ezingaphantsi kwama-250°C. Xa ukushisa okusebenzayo kuphakama, ukunyanzeliswa kwengcinezelo yomzimba we-valve kuya kuncipha. I-valve ye-American standard ibonakalisa uxinzelelo lwegama kwiipounds, okuyisiphumo sokubala sokushisa okudibeneyo kunye noxinzelelo lwentsimbi ethile, ebalwa ngokomgangatho we-ANSI B16.34. Isizathu esona sizathu sokuba kutheni iklasi yeepounds kunye noxinzelelo lwegama aluyiyo enye imbalelwano kukuba isiseko sokushisa seklasi yepounds kunye noxinzelelo lwegama luhluke. Sidla ngokusebenzisa isoftware ukubala, kodwa sikwafuna ukwazi ukusebenzisa iitafile ukujonga izikali. IJapan ikakhulu isebenzisa ixabiso le-K ukubonisa inqanaba loxinzelelo. Uxinzelelo lwegesi, e-China, ngokuqhelekileyo sisebenzisa iyunithi yayo yobunzima "kg" ukuchaza (kunokuba "jin"), kwaye iyunithi yi-kg. Iyunithi yoxinzelelo oluhambelanayo "kg / cm2", kunye nekhilogram enye yoxinzelelo ithetha ukuba enye ikhilogram yamandla isebenza kwi-square centimeter enye. Ngokufanayo, ngokuhambelana namazwe angaphandle, ngenxa yoxinzelelo lwegesi, iyunithi yoxinzelelo olusetyenziswa ngokuqhelekileyo "psi", kunye neyunithi "1 pounds / inch2", "ipounds nge-intshi yesikwere". Igama elipheleleyo lesiNgesi ziiPonti nge-intshi nganye. Kodwa isetyenziswa ngokuqhelekileyo ukubiza ngokuthe ngqo iyunithi yayo yobunzima, oko kukuthi, iponti (Lb.), eyi-Lb. Leyo yi-pound-force ekhankanywe ngaphambili. Inokubalwa ngokutshintsha zonke iiyunithi zibe yiyunithi yeemetriki: 1 psi = 1 pound / inch2 ≈0.068bar, 1 bar≈14.5psi≈0.1MPa, amazwe afana neYurophu kunye ne-United States asetyenziselwa ukusebenzisa i-psi njengeyunithi. KwiClass600 kunye neClass1500, kukho amaxabiso amabini ahlukeneyo ahambelana nomgangatho waseYurophu kunye nomgangatho waseMelika. I-11MPa (ehambelana neklasi ye-600-pound) yinkqubo yokulawula yaseYurophu, echazwe kwi "ISO 7005-1-1992 Steel Flanges"; I-10MPa (ehambelana neklasi ye-pound ye-600) yinkqubo yokulawula inkqubo yaseMelika, engummiselo kwi-ASME B16.5. Ngoko ke, akunakutsho ngokupheleleyo ukuba iklasi ye-600-pound ihambelana ne-11MPa okanye i-10MPa, kunye nemimiselo yeenkqubo ezahlukeneyo zihluke.
Kukho ubukhulu becala iintlobo ezimbini zeenkqubo zevalvu: enye yinkqubo "yoxinzelelo oluncinci" emelwe yiJamani (kubandakanywa nelizwe lam) ngokusekelwe kuxinzelelo oluvumelekileyo lokusebenza kwindawo yokushisa (i-100 degrees kwilizwe lam kunye ne-120 degrees eJamani). Enye yinkqubo "yobushushu kunye noxinzelelo" emelwe yi-United States, emelwe yingcinezelo yokusebenza evumelekileyo kwiqondo lokushisa elithile. Kwiqondo lokushisa kunye noxinzelelo lwe-United States, ngaphandle kwe-150Lb, esekelwe kwii-degrees ezingama-260, amanye amanqanaba asekelwe kwi-454 degrees. umlinganiselo. Ngokomzekelo, uxinzelelo oluvumelekileyo lwe-150Lb. I-25 carbon steel valve yi-1MPa kwii-degrees ze-260, kwaye uxinzelelo oluvumelekileyo kwiqondo lokushisa lokushisa lukhulu kakhulu kune-1MPa, malunga ne-2.0MPa. Ngoko ke, ukuthetha ngokuqhelekileyo, inqanaba loxinzelelo lwegama elihambelana ne-American Standard 150Lb yi-2.0MPa, kwaye inqanaba loxinzelelo lwegama elihambelana ne-300Lb ngu-5.0MPa, njl.
Ekubeni iziseko zokushisa zoxinzelelo lwegama kunye nokulinganisa uxinzelelo zihlukile, akukho mbalelwano olungqongqo phakathi kwezi zibini. Imbalelwano erhabaxa phakathi kwezi zimbini ibonisiwe kwitheyibhile.
Ixesha lokuposa: Aug-31-2023