Ububanzi bevalvu Φ, ububanzi be-DN, intshi” Ungakwazi yini ukuhlukanisa lawa mayunithi okucacisa?

Ngokuvamile kuba nabangane abangaqondi ubudlelwano phakathi kwezincazelo ze-“DN”, “Φ"kanye" "". Namuhla, ngizofingqa ubudlelwano phakathi kwalaba abathathu, ngithemba ukukusiza!

iyini i-intshi”

I-Inch (“) iyiyunithi yokucacisa esetshenziswa kakhulu ohlelweni lwaseMelika, njengamapayipi ensimbi,amavalvu, ama-flange, izindololwane, amaphampu, ama-tee, njll., njengoba incazelo ingu-10″.

I-intshi (intshi, efingqiwe njengoba injalo) isho isithupha ngesiDashi, kanti i-intshi ubude besithupha. Yiqiniso, ubude besithupha buhlukile. Ngekhulu le-14, iNkosi u-Edward II yamemezela "i-intshi ejwayelekile esemthethweni". Umgomo uwukuthi ubude bezinhlamvu ezintathu ezinkulu ezikhethwe phakathi kwezikhwebu zebhali futhi zihlelwe ngokulandelana ziyi-intshi eyodwa.

Ngokuvamile 1″=2.54cm=25.4mm

Kuyini i-DN

I-DN iyiyunithi yokucacisa esetshenziswa kakhulu eShayina naseYurophu, futhi iyincazelo yokumaka amapayipi,amavalvu, ama-flange, izinto zokufaka, namaphampu, njengeI-DN250.

I-DN ibhekisela kububanzi obujwayelekile bepayipi (okwaziwa nangokuthi ububanzi obujwayelekile), qaphela: lokhu akusikho ububanzi obungaphandle noma ububanzi obungaphakathi, kodwa isilinganiso sobubanzi obungaphandle nobubanzi obungaphakathi, obubizwa ngokuthi ububanzi obuphakathi obujwayelekile.

KuyiniΦ

Φ iyiyunithi evamile, ebhekisela kububanzi bangaphandle bamapayipi, noma izindololwane, insimbi eyindilinga nezinye izinto.

Ngakho-ke kuyini ukuxhumana phakathi kwabo?

Okokuqala, izincazelo eziphawulwe ngo-"" kanye no-"DN" zicishe zifane. Ngokuyisisekelo zisho ububanzi obujwayelekile, okubonisa usayizi walesi sichasiselo, kanyeΦ yinhlanganisela yalokhu okubili.

Ngokwesibonelo

Isibonelo, uma ipayipi lensimbi lingu-DN600, uma ipayipi lensimbi elifanayo limakwe ngamasentimitha, liba ngu-24″. Ingabe kukhona ukuxhumana phakathi kwalokhu okubili?

Impendulo inguyebo! I-intshi ejwayelekile iyinombolo ephelele futhi iphindwe ngqo ngo-25 ilingana ne-DN, njenge-1″*25=DN25, 2″*25=50, 4″*25=DN100, njll. Vele, kunezinhlobo ezahlukene ezifana ne-3″*25=75 Ukuzungeza yi-DN80, futhi kunezinye ama-intshi anama-semicolon noma amaphuzu edesimali afana ne-1/2″, 3/4″, 1-1/4″, 1-1/2″, 2-1/2″, 3-1/2″ njalo njalo, lezi azikwazi ukubalwa kanjalo, kodwa ukubalwa kucishe kufane, ngokuyisisekelo inani elichaziwe:

1/2″=DN15

3/4″=DN20

1-1/4″=DN32

1-1/2″=DN40

2″=DN50

2-1/2″=DN65

3″=DN80