Kupendekeka kumapangidwa potembenuza m'mphepete mwa kunja kapena m'mphepete mwa dzenje la chinthu chopanda kanthu kapena chomwe chatsirizidwa kukhala chopingasa motsatira njira inayake.Malinga ndi mawonekedwe a chopanda kanthu ndi m'mphepete mwa workpiece, flanging akhoza kugawidwa mu dzenje lamkati (bowo lozungulira kapena dzenje losazungulira) flanging, ndege yakunja m'mphepete ndi yopindika pamwamba, etc. mbali zina zovuta, sinthani kayendedwe ka pulasitiki kazinthuzo kuti mupewe kusweka kapena makwinya.Titha kupereka mpweya zitsulo flanging, aloyi flanging, zitsulo zosapanga dzimbiri flanging M'mphepete etc. Zogulitsazi zimagwirizana ndi ASME B16.9, ISO, API, EN, DIN, BS, JIS, GB etc.