I-flange, eyaziwa ngokuba yi-flange okanye i-flange. I-flange yinxalenye edibanisa i-shafts kwaye isetyenziselwa ukudibanisa iziphelo zepayipi; Kwakhona luncedo ziiflange kwindawo yokungena kunye nokuphuma kwezixhobo, ezisetyenziselwa ukudibanisa izixhobo ezibini, ezifana neeflange zebhokisi yegiya. Uqhagamshelo lweflange okanye udibaniso lweflange lubhekisa kuqhagamshelo olunokudityaniswa olwenziwe ludibaniso lweeflange, iigaskets, kunye neebholiti ezidityaniswe kunye njengesakhiwo sokutywina. Iflange yombhobho ibhekisa kwiflange esetyenziselwa imibhobho kwisixhobo sombhobho, kwaye xa isetyenziswa kwisixhobo, ibhekisa kwiflange yokungena nokuphuma kwesixhobo. Ngokwamanqanaba ahlukeneyo oxinzelelo lwegama leevalvu, iiflange ezinamaqondo ahlukeneyo oxinzelelo ziqwalaselwe kwiiflange zemibhobho. Kulo mba, iinjineli zaseJamani ezivela kwiWadi yeWODE zazisa amanqanaba oxinzelelo lweflange asetyenziswa ngokuqhelekileyo ngokwemigangatho yehlabathi:

Ngokutsho kwe-ASME B16.5, iiflange zensimbi zinemilinganiselo ye-7 yoxinzelelo: I-Class150-300-400-600-900-1500-2500 (i-flanges ehambelana nelizwe jikelele ine-PN0.6, i-PN1.0, i-PN1.6, i-PN2.5, i-PN4 .0, PN6.4, PN10, PN16, PN25, PN32Mpa amanqaku)

Ukulinganiswa koxinzelelo lweflange kucace kakhulu. Iiflange zeClass300 zinokumelana noxinzelelo olukhulu kuneClass150 kuba iiFlange zeClass300 kufuneka zenziwe ngezinto ezininzi ukumelana noxinzelelo olukhulu. Nangona kunjalo, amandla oxinzelelo lweeflange aphenjelelwa zizinto ezininzi. Ukulinganiswa koxinzelelo lwe-flange kubonakaliswe ngeepounds, kwaye kukho iindlela ezahlukeneyo zokumela ukulinganisa uxinzelelo. Umzekelo, iintsingiselo ze-150Lb, 150Lbs, 150 #, kunye neClass150 ziyafana.