Ubale pakati pa zomwe DN, Φ ndi inchi.

Kodi "inchi" ndi chiyani: Inchi (") ndi gawo lodziwika bwino pamachitidwe aku America, monga mapaipi achitsulo, mavavu, ma flanges, zigononi, mapampu, ma tee, ndi zina zotere, monga mafotokozedwe ndi 10 ″.

Inchies (inchi, chidule monga in.) amatanthauza chala chachikulu mu Chidatchi, ndipo inchi imodzi ndi utali wa chala chachikulu.Inde, utali wa chala chachikulu cha munthu ndi wosiyananso.M'zaka za zana la 14, King Edward II adatulutsa "inchi yovomerezeka".

Zimanenedwa kuti utali wa njere zitatu zazikuluzikulu zosankhidwa pakati pa ngala za barele ndi zokonzedwa motsatira mzere ndi inchi imodzi.

Nthawi zambiri 1″=2.54cm=25.4mm

Kodi DN ndi chiyani: DN ndi gawo lomwe limagwiritsidwa ntchito kwambiri pamakina aku China ndi ku Europe.Ndilonso ndondomeko yodziwira mapaipi, ma valve, ma flanges, zopangira mapaipi ndi mapampu, monga DN250.

DN imatanthawuza kukula kwake mwadzina kwa chitoliro (chomwe chimadziwikanso kuti m'mimba mwake mwadzina), zindikirani: uku sikuli m'mimba mwake kapena m'mimba mwake wamkati, ndi avareji ya m'mimba mwake yakunja ndi m'mimba mwake wamkati, wotchedwa m'mimba mwake wapakati.

Kodi Φ: Φ ndi gawo lalikulu, lomwe limatanthawuza kukula kwa mapaipi, zigono, zitsulo zozungulira ndi zida zina.Itha kunenedwanso kuti ndi diameter.Mwachitsanzo, Φ609.6mm amatanthauza awiri akunja 609.6mm.

Tsopano popeza tapeza kuti zigawo zitatuzi zikuyimira chiyani, pali kulumikizana kotani pakati pawo?

Choyamba, "Tanthauzo la "DN" ndi pafupifupi lofanana ndi la DN, makamaka limatanthauza m'mimba mwake mwadzina, kusonyeza kukula kwa ndondomekoyi, ndipo Φ ndikuphatikiza ziwirizi.

Mwachitsanzo: ngati chitoliro chachitsulo ndi DN600, ndipo chitoliro chomwecho chili ndi mainchesi, chimakhala 24 ″.Kodi pali kugwirizana kulikonse pakati pa awiriwa?

Yankho ndi lakuti inde!Inchi wamba ndikuchulutsa kwachindunji kwa chiwerengero ndi 25, chomwe chili chofanana ndi DN, monga 1″*25=DN25 2″*25=50 4″*25=DN100 ndi zina zotero.

Zachidziwikire, palinso zosiyana, monga 3 ″ * 25 = 75, zozunguliridwa ku DN80 yapafupi, ndi mainchesi ena okhala ndi ma semicolons kapena ma decimal, monga 1/2 ″ 3/4 ″ 1-1/4 ″ 1 -1/2″ 2-1 /2″ 3-1/2″, ndi zina zotero, izi sizingawerengedwe motero, koma kuwerengera kuli kofanana, makamaka mtengo womwe watchulidwa:

1/2″=DN15 3/4″=DN20 1-1/4″=DN32 1-1/2″=DN40 2-1/2″=DN65 3-1/2″=DN90