1. Ububanzi begama DN:
I-Flangei-diameter encane ibhekisela kububanzi obujwayelekile besitsha noma ipayipi eline-flange. I-diameter yesitsha ibhekisela kububanzi obungaphakathi besiqukathi (ngaphandle kwesitsha esineshubhu njengesilinda), ububanzi obuncane bepayipi bubhekisela kububanzi balo obuvamile, okuyinani phakathi kobubanzi obungaphakathi nobubanzi obungaphandle bepayipi. ipayipi, iningi lazo eliseduze nobubanzi bangaphakathi bepayipi. I-diameter yangaphandle yepayipi yensimbi enobubanzi obufanayo obufanayo buyafana, futhi ububanzi bangaphakathi buhlukile ngoba ubukhulu buyashintsha. 14 - bheka ithebula 1.

2. Ukucindezela okulinganiselwe kwe-PN:
Ukucindezela okuzisholo kuyizinga lokucindezela elinikezwe ngenjongo yokusungula izinga. 14 - bheka ithebula 2.
3. Ingcindezi yokusebenza ephezulu evumelekile:
Ingcindezi okuzisholo in ingcindezi umkhumbi flange standard kunqunywa ngaphansi isimoimpahla ye-flange16Mn (noma 16MnR) kanye nezinga lokushisa lokuklama elingu-200oC. Lapho i-impahla ye-flangekanye nokushintsha kwezinga lokushisa, ukucindezela okuphezulu okuvumelekile okusebenzayo kwe-flange kuzokwanda noma kwehle. Isibonelo, ukucindezela okuphezulu okuvunyelwe ukusebenza kwe-flange ye-welding ye-butt enentamo ende kuboniswa kuThebula 14-3.