Ngokuvamile, ububanzi bepayipi bungahlukaniswa bube ububanzi obungaphandle (De), ububanzi obungaphakathi (D), ububanzi obujwayelekile (DN).
Ngezansi ukukunikeza umehluko phakathi kwale mehluko ethi “De, D, DN”.

I-DN ububanzi obujwayelekile bepayipi

Qaphela: Lokhu akulona ububanzi bangaphandle noma ububanzi bangaphakathi; kufanele kuhlotshaniswe nokuthuthukiswa kwasekuqaleni kobunjiniyela bamapayipi kanye namayunithi asebukhosini; ngokuvamile asetshenziselwa ukuchaza ipayipi lensimbi elenziwe nge-galvanized, elihambisana namayunithi asebukhosini kanje:

Ipayipi elinezingxenye ezine: 4/8 intshi: DN15;
Ipayipi lemizuzu eyi-6: 6/8 intshi: DN20;
Ipayipi eliyi-intshi eli-1: intshi eli-1: DN25;
Ipayipi eliyi-intshi ezimbili: 1 kanye ne-1/4 inches: DN32;
Ipayipi elingamasentimitha angu-1 no-1/2: DN40;
Ipayipi lamasentimitha amabili: amasentimitha amabili: DN50;
Ipayipi elingamasentimitha amathathu: amasentimitha amathathu: DN80 (izindawo eziningi nazo zibizwa ngokuthi DN75);
Ipayipi elingamasentimitha amane: amasentimitha amane: DN100;
Amanzi, ipayipi lensimbi yokudlulisa igesi (ipayipi lensimbi elenziwe nge-galvanizednoma ipayipi lensimbi elingelona i-galvanized), ipayipi lensimbi elibunjiwe, ipayipi elihlanganisiwe lensimbi-ipulasitiki kanye nepayipi le-polyvinyl chloride (PVC) kanye nezinye izinto zamapayipi, kufanele kumakwe ngobubanzi obujwayelekile "DN" (njenge-DN15, DN20).

 

I-De ibhekisela kakhulu kububanzi bangaphandle bepayipi
Ukusetshenziswa okuvamile kwe-De labeling, kudingeka ilebula ibe yisimo sobubanzi obungaphandle bodonga obungu-X;

Isetshenziswa kakhulu ukuchaza:ipayipi lensimbi elingenamthungo, amapayipi e-PVC kanye namanye epulasitiki, kanye namanye amapayipi adinga ukujiya kodonga okucacile.
Thatha ipayipi lensimbi elihlanganisiwe elenziwe nge-galvanized njengesibonelo, nge-DN, De izindlela ezimbili zokulebula yilezi ezilandelayo:
DN20 De25×2.5mm
DN25 De32×3mm
DN32 De40×4mm
DN40 De50×4mm

......

 

U-D ngokuvamile ubhekisela kububanzi bangaphakathi bepayipi, u-d ubonisa ububanzi bangaphakathi bepayipi likakhonkolo, kanti u-Φ ubonisa ububanzi bendilinga evamile.

U-Φ ungabonisa futhi ububanzi bangaphandle bepayipi, kodwa-ke kufanele buphindwe ngobukhulu bodonga.
Isibonelo, i-Φ25×3 isho ipayipi elinobubanzi obungaphandle obungu-25mm kanye nobukhulu bodonga obungu-3mm.
Ipayipi lensimbi elingenamthungo noma ipayipi lensimbi elingenayo insimbi, kufanele libhalwe ukuthi “ububanzi bangaphandle × ubukhulu bodonga”.
Isibonelo: Φ107×4, lapho u-Φ engashiywa khona.
Ingxenye yeShayina, i-ISO kanye neJapane yokubhala amapayipi ensimbi kusetshenziswa ubukhulu bokujiya kodonga ukukhombisa ukujiya kodonga kochungechunge lwamapayipi ensimbi. Kulolu hlobo lwepayipi lensimbi, indlela yokuveza ipayipi ububanzi bangaphandle × ukujiya kodonga. Isibonelo: Φ60.5×3.8

De, DN, d, ф yobubanzi bokubonakaliswa obufanele!
De-- PPR, PE ipayipi, polypropylene ipayipi OD
Ipayipi le-DN -- i-polyethylene (i-PVC), ipayipi lensimbi ephonswe, ipayipi elihlanganisiwe lensimbi-ipulasitiki, ipayipi lensimbi elihlanganisiwe elinobubanzi obujwayelekile
d -- ububanzi obujwayelekile bepayipi likakhonkolo
ф -- ububanzi obujwayelekile bepayipi lensimbi engenamthungo