Iyini i-diameter yegama?

Ngokuvamile, ububanzi bepayipi bungahlukaniswa ububanzi obungaphandle (De), ububanzi bangaphakathi (D), ububanzi begama (DN).
Ngezansi ukukunikeza umehluko phakathi kwalo mehluko we-“De, D, DN”.

I-DN ububanzi obujwayelekile bepayipi

Qaphela: Lokhu akuwona ububanzi bangaphandle noma ububanzi bangaphakathi; kufanele ihlobane nokuthuthukiswa kwangaphambi kwesikhathi kobunjiniyela bamapayipi kanye namayunithi ombuso; evame ukusetshenziselwa ukuchaza ipayipi lensimbi eliphehliwe, elihambisana namayunithi ombuso ngale ndlela elandelayo:

Ipayipi lengxenye engu-4: 4/8 intshi: DN15;
Ipayipi lemizuzu engu-6: 6/8 intshi: DN20;
1 intshi ipayipi: 1 intshi: DN25;
I-intshi ezimbili ipayipi: 1 futhi 1/4 amayintshi: DN32;
Ipayipi le-intshi eyisigamu: 1 no-1/2 amayintshi: DN40;
Ipayipi lama-intshi amabili: amayintshi angu-2: DN50;
Ipayipi elingamayintshi amathathu: amayintshi angu-3: DN80 (izindawo eziningi nazo zibhalwe ngokuthi DN75);
Ipayipi lama-intshi amane: amayintshi angu-4: DN100;
Amanzi, igesi yokudlulisa ipayipi lensimbi (ipayipi lensimbinoma ipayipi lensimbi elingaphekiwe), ipayipi lensimbi ewukhonkolo, ipayipi eliyinhlanganisela yensimbi-yepulasitiki kanye nepayipi le-polyvinyl chloride (PVC) nezinye izinto zamapayipi, kufanele zimakwe ngobubanzi obungajwayelekile “DN” (njenge-DN15, DN20).

 

I-De ngokuyinhloko ibhekisela kububanzi obungaphandle bepayipi
Ukusetshenziswa okuvamile kokufakwa ilebula kuka-De, kudingeka kufakwe ilebuli yobukhulu bodonga obuyi-diameter X;

Isetshenziswa kakhulu ukuchaza:ipayipi lensimbi engenamthungo, i-PVC namanye amapayipi epulasitiki, namanye amapayipi adinga ukushuba kodonga olucacile.
Thatha ipayipi lensimbi elishiselwe njengesibonelo, nge-DN, De izindlela ezimbili zokulebula zimi kanje:
DN20 De25×2.5mm
DN25 De32×3mm
DN32 De40×4mm
DN40 De50×4mm

......

 

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

I-Φ ingaphinda ibonise ububanzi obungaphandle bepayipi, kodwa-ke kufanele iphindwe ubukhulu bodonga.
Isibonelo, u-Φ25×3 usho ipayipi elinobubanzi obungaphandle obungu-25mm kanye nogqinsi lwedonga elingu-3mm.
Ipayipi lensimbi elingenamthungo noma ipayipi lensimbi elingeyona ayoni, kufanele limakwe “ububanzi bangaphandle × ukushuba kodonga”.
Isibonelo: Φ107×4, lapho Φ ingashiywa khona.
I-China, ISO kanye nengxenye yase-Japan yokulebula kwepayipi lensimbi kusetshenziswa ubukhulu bodonga ukuze kuboniswe ukujiya kodonga lochungechunge lwamapayipi ensimbi. Ngalolu hlobo lwepayipi yensimbi, indlela yokukhuluma yepayipi ngaphandle kobubanzi × ubukhulu bodonga. Isibonelo: Φ60.5×3.8

I-De, DN, d, ф yohlu olufanele lwenkulumo!
De-- PPR, PE ipayipi, polypropylene ipayipi OD
I-DN -- ipayipi le-polyethylene (PVC), ipayipi lensimbi elisansimbi, ipayipi eliyinhlanganisela yensimbi-plastic, ipayipi lensimbi ebilisiwe ububanzi obujwayelekile
d -- ipayipi likakhonkolo ububanzi begama
ф -- ipayipi lensimbi engenamthungo ububanzi begama