Yahlula ngokukhawuleza ipayipi Φ, DN, kunye nee-intshi

Kuyilo nasekufumaneni imibhobho, izixhobo zokufaka iipayipi kunye neevalvu, i-Φ, i-DN kunye nee-intshi (“) ziiyunithi ezintathu zeenkcukacha ezidideka lula. Umahluko wazo ophambili kukuba: i-Φ imele ububanzi bangaphandle bokwenyani, i-DN yikhowudi yeenkcukacha kwinkqubo ye-metric, kwaye ii-intshi yikhowudi yeenkcukacha kwinkqubo ye-imperial. Okulandelayo, umahluko ocacileyo kunye nonxibelelwano phakathi kwezi zintathu luchazwa:

1. Umahluko kwiinkcazo eziphambili

Φ (ububanzi):U-Φ ngunobumba wesiGrike omele ububanzi bokwenyani bokwenyani (ngokuqhelekileyo ububanzi bangaphandle). Lona luphawu olucacileyo kwaye alufuni kuguqulwa. Umzekelo, u-Φ114.3 uthetha ukuba ububanzi bangaphandle bombhobho yi-114.3mm.

I-DN (Ububanzi obuqhelekileyo):I-DN (Ububanzi obungalinganiswanga) bububanzi obungalinganiswanga kwinkqubo ye-metric. Ayilobubanzi bangaphakathi okanye ububanzi bangaphandle, kodwa "bubungakanani obungalinganiswanga" obuchazwe ngokwenziwa ukuze kube lula ukunxibelelana (malunga nomyinge wobubanzi bangaphakathi kunye nobubanzi bangaphandle). Umzekelo, i-DN100 yikhowudi yeenkcukacha kwaye ububanzi bayo bangaphandle bunokuba yi-114.3mm okanye i-108mm.

Intshi (“):I-intshi yiyunithi yobude kwinkqubo yobukhosi (1 intshi = 25.4mm). Kwiipayipi, ikwamele ububanzi obuqhelekileyo. Umzekelo, i-4″ imele ipayipi ye-4-intshi, kwaye ububanzi bayo bangaphandle buqiniswe kwi-114.3mm.

2. Ukucaca kunye nokungangqinelani kokuchonga

Φ Eyona icacileyo:ububanzi bangaphandle bokwenyani buphawulwe ngokuthe ngqo, okubonayo koko ukufumeneyo, akukho ngqiqweni.

Ii-intshi zichaneke ngakumbi:Kwimibhobho yaseBritane (iPipe), ububanzi bangaphandle obuhambelana nee-intshi buhlukile. Umzekelo, i-4″ yi-Φ114.3, i-10″ yi-Φ273, akukho siqinisekiso songezelelweyo sifunekayo.

Kukho ukungacaci kwi-DN:ixabiso elifanayo le-DN linokuhambelana nothotho lwe-outer diameter ezimbini ezahlukeneyo kwiinkqubo zemibhobho yasekhaya. Umzekelo i-DN100:

- Uthotho lwe-I (Uthotho/lwamazwe ngamazwe):ububanzi bangaphandle yi-Φ114.3mm

- II series (B series/ukusetyenziswa ekhaya):ububanzi bangaphandle yi-Φ108mm

Ngoko ke, xa uthenga okanye udweba, ukuba ubhala i-DN100 kuphela, kufuneka ubonise nokuba luluhlu lwe-I okanye lwe-II, kungenjalo kulula ukuthenga imveliso engalunganga.

3. Ubudlelwane phakathi kweempawu ezintathu

Ezi zintathu azinakuguqulwa ngokuphindaphinda nokwahlulahlula okulula kwezibalo (umzekelo, awunakusebenzisa ngqo i-DN100 / 25.4 ukubala ii-intshi), kodwa kufuneka uxhomekeke kwiitheyibhile zokuthelekisa ezisemgangathweni zoshishino.

4. Iimeko ezisebenzayo kunye neenkcukacha zokulebhelisha

I-DN:Isetyenziswa kakhulu kwimibhobho yentsimbi yokuthutha amanzi negesi (egalelwe i-galvanized okanye engagalelwanga i-galvanized), imibhobho yesinyithi esibunjiweyo, imibhobho yeplastiki, njl.

Φ:Isetyenziswa rhoqo kwimibhobho yentsimbi engenamthungo, imibhobho yentsimbi engatyiwayo, imibhobho yentsimbi engenasinyithi, njl. Xa iphawulwa, isetyenziswa kunye nobukhulu bodonga, obufana no-Φ108×4 (okuthetha ububanzi bangaphandle obuyi-108mm, ubukhulu bodonga obuyi-4mm).

Intshi:Isetyenziswa kakhulu kwiipayipi kunye nokufakelwa kweevalvu kwiinkqubo zaseMelika naseYurophu, kunye nakwiindawo zoshishino zemveli ezifana neoyile kunye negesi yendalo.

5. Isishwankathelo

Φ:Imele ububanzi bangaphandle bombhobho. Ukukhetha into ehambelanayoivalvu yebhabhathane, ivalvu yesangokunyeivalvu yokujonga, jonga nje ububanzi bangaphandle bombhobho ngokuthe ngqo.

I-DN:Yikhowudi yobubanzi obuqhelekileyo kuphela. Xa uthenga iivalvu, qiniseka ukuba uyaqinisekisa uthotho lwe-A/I kunye ne-B/II ukuze uphephe ukungaphumeleli kokudibanisa iiflange.I-TWSizinto ezifunekayoiivalvu zebhabhathane, iivalvu zesango, iivalvu zokujongakunye nezinye iimveliso. Xa u-odola, iiparameter zoluhlu kufuneka zichazwe ukuqinisekisa ukuhambelana kwemibhobho.

Intshi (“):Ububanzi obuqhelekileyo baseBritane, obusetyenziswa kakhulu kwiivalvu ezingeniswe kwamanye amazwe. I-25.4 ayinakusetyenziselwa ukuguqula nje ububanzi obungaphandle ngokuthe ngqo. Kufuneka iqinisekiswe ngokubhekisa kwitheyibhile eqhelekileyo.