I-DN (ububanzi be-beminal) isho ububanzi bepayipi, okuyisilinganiso sobubanzi obungaphandle kanye nobubanzi obungaphakathi. Inani le-DN = inani le-de -0.5 * Inani le-tube odongeni. Qaphela: Lokhu akuyona ububanzi obungaphandle noma ububanzi obungaphakathi.

Amanzi, ipayipi lensimbi yokuhambisa igesi (ipayipi lensimbi ye-galvanized noma ipayipi lensimbi elingewona kahle , DN50).

De (ububanzi bangaphandle) kusho ububanzi obungaphandle kwepayipi, i-PPR, ipayipi lepayipi, okumakwe ngawo ububanzi obude, futhi bonke badinga ukumakwa njengendlela yobubanzi obungelodonga, ngokwesibonelo de25 × 3 .

U-D ngokuvamile abhekisele kububanzi bephayiphu.

U-D ngokuvamile abhekisele kububanzi bangaphakathi kwepayipi likakhonkolo. Amapayipi aqinisiwe kakhonkolo (noma ukhonkolo), amapayipi obumba, amapayipi okuvimbela ama-ceramic angenangqondo, ama-cylinder tile namanye amapayipi, okububanzi bawo kufanele amelwe yi-Intermenter D (D380, njll.)

Φ iphinde ububanzi bendilinga ejwayelekile; Kungaphinde futhi kufaneke ububanzi obungaphandle kwepayipi, kepha kulokhu kufanele kuphindelwe ngobukhulu bodonga.