Prirobnica je deli, ki povezujejo dva cev, prirobnica je določena s prirobnico, tesnilo in vijaki trije so povezani kot skupina kombinirane tesnilne strukture snemljive povezave. Tesnilo se doda med obe prirobnici in nato pritrjeno z vijaki. Different pressure flange, thickness is different, and the bolts they use are different, when pump and valve connect with pipe, the parts of the equipment are also made of the corresponding flange shape, also known as flange connection, usually closured bolted connection parts are also known as flanges, such as the connection of ventilation pipe, this kind of parts can be called “flange type part”, but this connection is only part of a device, such as the connection between flange and water pump, it’s not Nepopoten za klicanje vodne črpalke kot dele prirobnice, vendar relativni majhen ventil, jo lahko imenujemo kot dele prirobnice.