Ububanzi be-Valve φ, i-DN ye-DN, intshi "ungakwazi ukwahlukanisa lezi zinto ezichazayo?

Ngokuvamile kubangani abangabuzi ubudlelwano phakathi kokucaciswa kwe- "DN", "Φ"Futhi" "" "Namuhla, ngizofingqa ubudlelwano phakathi kwabathathu ngawe, nginethemba lokukusiza!

yini intshi "

I-Inch (") iyunithi yokucaciswa evame ukusetshenziswa ohlelweni lwaseMelika, njengamapayipi ensimbi,amavalve, ama-Flangese, ama-elbows, amaphampu, ama-tees, njll., njengokucacisa ukuthi i-10 ".

Inch (intshi, ifushanisiwe njengase.) Kusho isithupha ngesiDashi, futhi i-intshi ubude besithupha. Vele, ubude besithupha buhlukile. Ngekhulu le-14, iKing Edward II yakhuthaza "i-inch ejwayelekile yezomthetho". Ukubaluleka ukuthi ubude bezinhlamvu ezintathu ezinkulu ezikhethiwe kusuka maphakathi kwezindlebe zebhali futhi kuhlelwe ngokulandelana kuyinto eyodwa intshi.

Ngokuvamile 1 "= 2.54cm = 25.4mm

Yini i-dn

I-DN iyunithi esetshenziswayo esetshenziswa kakhulu e-China nase-European Systems, futhi futhi kuyincazelo yamapayipi okumaka,amavalve, ama-flangese, ukufakwa, namaphampu, njengeDn250.

I-DN isho ububanzi bepayipi (eyaziwa nangokuthi ububanzi bemiculo), Qaphela: lokhu akulona ububanzi obungaphandle noma ububanzi obungaphandle, kepha isilinganiso sobubanzi obungaphandle nobubanzi besilinganiso sangaphakathi.

YiniΦ

Φ iyunithi elijwayelekile, elibhekisela kububanzi obungaphandle kwamapayipi, noma ama-elbows, insimbi eyindilinga nezinye izinto.

Ngakho-ke yini ukuxhumana phakathi kwabo?

Okokuqala, izincazelo eziphawulwe ngo- "" "" no- "DN" zicishe zifane. Basho ngokujwayelekile. Basho ububanzi bokucaciswa, okubonisa usayizi wale ncazelo, futhiΦ inhlanganisela yalaba bobabili.

Ngokwesibonelo

Isibonelo, uma ipayipi lensimbi liyi-DN600, uma ipayipi elifanayo lensimbi limakwe kuma-inches, liba ngu-24 ". Ingabe kukhona ukuxhumana phakathi kwalokhu okubili?

Impendulo inguyebo! I-intshi ejwayelekile iyinombolo futhi iphindaphindwe ngokuqondile ngabangu-25 ilingana ne-DN, efana ne-1 "* 25 = 25, i-3/4 2-1 / 2 ", 3-1 / 2" nokunye, lokhu akunakubalwa kanjalo, kepha ukubalwa kucishe kube okufanayo, ngokuyisisekelo inani elishiwoyo:

1/2 "= DN15

3/4 "= DN20

1-1/4 "= DN32

1-1/2 "= DN40

2 "= DN50

2-1 / 2 "= DN65

3 "= DN80