Yini “intshi”: Intshi (“) yiyunithi levamile yekucacisa yeluhlelo lwaseMelika, njengemaphayiphi ensimbi, emavalvu, emaflanges, tindololwane, emaphampu, ematee, njll, njengekucacisa ngu 10′′.
Intshies (inch, ifinyetiwe ngekutsi in.) kusho sitfupha ngesiDashi, futsi intshi yinye budze besitfupha. Kuliciniso kutsi budze besitfupha semuntfu nabo buhlukile. Ngelikhulu lesi-14, iNkhosi Edward II yakhipha “intshi lejwayelekile lesemtsetfweni”.
Kubekiwe kutsi budze betinhlavu letintsatfu letinkhulu letikhetsiwe kusuka emkhatsini wendlebe yebhali futsi tihlelwe ngemugca buyintshi yinye.
Ngalokuvamile 1 ′′ = 2.54 cm = 25.4 mm
Yini i-DN: i-DN iyunithi yekucacisa levame kusetjentiswa etinhlelo taseShayina naseYurophu. Kuphindze kube yincazelo yekukhomba emaphayiphi, emavalvu, emaflanges, tintfo tekufaka emaphayiphi kanye nemaphampu, njenge DN250.
DN kusho bubanti lobubitwako beliphayiphi (lobuphindze batiwe ngekutsi bubanti lobubitwako), caphela: loku akusiko bubanti bangaphandle noma bubanti bangekhatsi, silinganiso sebubanti bangaphandle kanye nebubanti bangekhatsi, lokubitwa ngekutsi bubanti bangekhatsi lobusemkhatsini.
Yini Φ: Φ iyunithi jikelele, okusho ububanzi bangaphandle emaphayiphi, tindololwane, insimbi round kanye naletinye tintfo. Kungaphindze kutsiwe ngububanti. Sibonelo, Φ609.6mm kusho ububanzi bangaphandle 609.6mm.
Njengobe sesitfole kutsi lamayunithi lamatsatfu amelelani, yini kuchumana emkhatsini wawo?
Kwekucala, “Inshokutsi ye “DN” icishe ifane naleyo ye DN, ngalokuyinhloko kusho bubanti lobubitwako, lobukhombisa bukhulu balokucaciswa, futsi Φ kuhlanganisa lokubili.
Sibonelo: uma liphayiphi lensimbi lingu DN600, futsi leliphayiphi lensimbi lelifanako limakwe ngema inches, liba ngu 24′′. Kukhona yini kuchumana emkhatsini walaba lababili?
Imphendvulo kutsi yebo! Intshi jikelele kuphindzaphindza ngalokucondzile kwenani leliphelele nga 25, lelilingana ne DN, njenge 1′′*25=DN25 2′′*25=50 4′′*25=DN100 njalonjalo.
Yebo, kukhona naletinye letehlukene, njenge 3 ′′ * 25 = 75, leyindingilizi kuya ku DN80 lesedvute, kanye nalamanye emasentimitha lanema semicolon noma emaphuzu elishumi, njenge 1/2 ′′ 3/4 ′′ 1-1/4 ′′ 1-1/2 ′′ t njll letingaba, 2-31/2. kubalwa kanjalo, kepha kubalwa kucishe kufane, ngalokuyinhloko linani lelicacisiwe:
1/2"=DN15 3/4"=DN20 1-1/4"=DN32 1-1/2"=DN40 2-1/2"=DN65 3-1/2"=DN90
Sikhatsi sekuposa: Mashi-10-2022
