Nominal pressure (PN), Class American standard pound level ( Lb ), inzira yekuratidza kudzvinyirirwa, mutsauko ndewekuti kudzvinyirirwa kwavanomiririra kunoenderana neyakasiyana yereferensi tembiricha, iyo PN European system inoreva kudzvanywa kuri 120 ° C Kumanikidza kunoenderana, nepo CLAss American Standard inoreva kumanikidza kunoenderana pa 425.5 ° C. Naizvozvo, mukumanikidza kweinjiniya kungoita, haigone kuchinjika. Semuyenzaniso, CLAss300 inofanira kunge iri 2.1MPa nekushandurwa kuri nyore. Nekudaro, kana tembiricha yekushanda ichitariswa, kumanikidza kunoenderana kuchawedzera. Zvinoenderana nekushisa uye kumanikidza kuramba bvunzo yechinhu Chiyero chakaenzana ne5.0MPa.
Kune mhando mbiri dzemavharuvhu masisitimu: imwe ndeye "nominal pressure" system inomiririrwa neGermany (kusanganisira China) zvichibva pane inobvumirwa kushanda kumanikidza patembiricha yekamuri (100 madhigirii munyika yangu uye 120 madhigirii muGermany). Imwe ndeye "tembiricha uye kumanikidza system" inomiririrwa neUnited States, iyo inomiririrwa neinobvumirwa kushanda kumanikidza pane imwe tembiricha. Mune tembiricha uye kumanikidza system yeUnited States, kunze kwe150Lb, iyo yakavakirwa pa260 madhigirii, mamwe mazinga akavakirwa pa454 madhigirii. . Kushungurudzika kunobvumirwa kwekirasi ye150-psi (150psi = 1MPa) No. 25 carbon steel valve is 1MPa pa 260 degrees, uye kushushikana kunobvumirwa pakushambidzika kwekamuri kwakakura kudarika 1MPa, inenge 2.0MPa. Naizvozvo, kazhinji kutaura, mwero wezita wekumanikidza unoenderana neAmerican Standard 150Lb ndeye 2.0MPa, uye iyo yezita yekumanikidza level inoenderana ne300Lb ndeye 5.0MPa, zvichingodaro. Naizvozvo, iyo yezita kudzvanywa uye tembiricha uye kumanikidza mamakisi hazvigone kushandurwa zvakajairika zvinoenderana neiyo pressure conversion formula .
PN ikodhi ine chekuita nekumanikidzwa inomiririrwa nenhamba, uye iri nyore kutenderera nhamba yereferensi. PN ndiyo inhamba isingadziviriri yeMPa inenge yakaenzana nekushisa kwakajairika, inova iyo yekumanikidza yezita inowanzo shandiswa neMavharuvhu eChinese. For control mavharuvhu anecarbon steel valvemiviri, inoreva kudzvinyirira kunobvumirwa kushanda kana kushandiswa pasi pe200 ° C; kune miviri yesimbi yakakandwa yevharuvhu, inoreva kune yakanyanya kubvumidzwa kumanikidza kushanda kana yakashandiswa pasi pe120 ° C; Kunyanya kubvumirwa kushanda kwezvikumbiro kuri pasi pe250°C. Kana kutonhora kwekushanda kuchikwira, kudzvinyirira kwemuviri wevhavha kunoderera. IAmerican standard valve inoratidzira kudzvanywa kwezita mumapaundi, inova mugumisiro wekuverenga wekusanganiswa kwekushisa uye kumanikidzwa kweimwe simbi , iyo inoverengwa maererano nechiyero che ANSI B16.34. Chikonzero chikuru nei kirasi yepondo uye yekumanikidza yezita isiri imwe-kune-imwe tsamba ndeyekuti tembiricha yekirasi yepondo uye yekumanikidza yezita zvakasiyana. Isu tinowanzo shandisa software kuverenga, asi isu tinodawo kuziva mashandisiro ematafura kutarisa zviyero. Japan inonyanya kushandisa kukosha kweK kuratidza huwandu hwekumanikidza. Nekudzvanywa kwegasi, kuChina, isu tinowanzo shandisa huwandu hwayo "kg" kurondedzera (panzvimbo pe "jin"), uye unit ikg. Iyo inopindirana yekumanikidza unit ndeye "kg / cm2", uye imwe kirogiramu yekumanikidza inoreva kuti kirogiramu imwe yesimba inoshanda pane imwe square centimita. Saizvozvowo, zvinoenderana nenyika dzekunze, nekuda kwekumanikidza kwegasi, iyo inowanzoshandiswa kumanikidza unit ndeye "psi", uye iyo unit ndeye "1 pound / inch2", inova "pounds per square inch". Zita rakazara rechirungu nderekuti Pounds per square inch. Asi inonyanya kushandiswa kudana zvakananga hukuru hwayo, kureva, pound (Lb.), inova chaizvo Lb. Ndiyo pound-simba yambotaurwa. Inogona kuverengwa nekushandura zvikamu zvose kuva metric units: 1 psi = 1 pound / inch2 ≈0.068bar, 1 bar≈14.5psi≈0.1MPa, nyika dzakadai seEurope neUnited States dzinoshandiswa kushandisa psi sechikwata. MuKirasi600 uye Kirasi1500, kune maviri akasiyana maitiro anoenderana neEuropean standard uye American standard. 11MPa (inoenderana ne600-pound kirasi) ndiyo European system regulation, iyo inotsanangurwa mu "ISO 7005-1-1992 Steel Flanges"; 10MPa (inoenderana ne600-pound kirasi Kirasi) ndiyo yeAmerican system regulation, inova mutemo muASME B16.5. Nokudaro, hazvigoni kunyatsotaurwa kuti kirasi ye600-pound inoenderana ne11MPa kana 10MPa, uye mitemo yezvirongwa zvakasiyana zvakasiyana.
Kune kunyanya mhando mbiri dzemavharuvhu masisitimu: imwe ndeye "nominal pressure" system inomiririrwa neGermany (kusanganisira nyika yangu) zvichibva pakumanikidzwa kushanda kunobvumidzwa patembiricha yekamuri (100 madhigirii munyika yangu uye 120 madhigirii kuGermany). Imwe ndiyo "tembiricha nekumanikidza" system inomiririrwa neUnited States, iyo inomiririrwa neinobvumirwa kushanda kumanikidza pane imwe tembiricha. Mune tembiricha uye kumanikidza system yeUnited States, kunze kwe150Lb, iyo yakavakirwa pa260 madhigirii, mamwe mazinga akavakirwa pa454 madhigirii. benchmark. Semuenzaniso, iyo inobvumirwa kusagadzikana kwe150Lb. 25 carbon steel valve is 1MPa at 260 degrees, uye kushushikana kunobvumirwa pakupisa kwekamuri kwakakura kudarika 1MPa, iyo inenge 2.0MPa. Naizvozvo, kazhinji kutaura, mwero wezita wekumanikidza unoenderana neAmerican Standard 150Lb ndeye 2.0MPa, uye iyo yezita yekumanikidza level inoenderana ne300Lb ndeye 5.0MPa, zvichingodaro. Naizvozvo, iyo yezita kudzvanywa uye tembiricha uye kumanikidza mamakisi hazvigone kushandurwa zvakajairika zvinoenderana neiyo pressure conversion formula .
Sezvo zvigadziko zvekushisa zvezita rekumanikidza uye chiyero chekumanikidza zvakasiyana, hapana kunyorerana kwakasimba pakati pezviviri. Kunyorerana kwakakasharara pakati pezviviri kunoratidzwa mutafura.
Nguva yekutumira: Aug-31-2023