Menene “inch”: Inci (“) ƙayyadaddun ƙayyadaddun ƙayyadaddun tsarin tsarin Amurka ne, kamar bututun ƙarfe, bawuloli, flanges, gwiwar hannu, famfo, tees, da sauransu, kamar ƙayyadaddun shine 10″.
Incies (inci, gajarta kamar a cikin.) yana nufin babban yatsa a cikin Yaren mutanen Holland, kuma inci ɗaya shine tsayin babban yatsan hannu. Tabbas tsawon babban yatsan dan Adam shima ya sha banban. A cikin karni na 14, Sarki Edward II ya ba da "daidaitaccen inci na shari'a".
An kayyade cewa tsawon manyan hatsi uku da aka zabo daga tsakiyar kunun sha'ir kuma an jera su a jere ya kai inci daya.
Gabaɗaya 1″=2.54cm=25.4mm
Menene DN: DN yanki ne da aka saba amfani da shi a cikin tsarin Sinanci da na Turai. Hakanan ƙayyadaddun ƙayyadaddun bututu ne, bawul, flanges, kayan aikin bututu da famfo, kamar DN250.
DN yana nufin ƙananan diamita na bututu (wanda kuma aka sani da diamita mara kyau), lura: wannan ba diamita na waje ba ne ko diamita na ciki, shine matsakaicin diamita na waje da diamita na ciki, wanda ake kira matsakaicin diamita na ciki.
Menene Φ: Φ wata ƙungiya ce ta gaba ɗaya, wanda ke nufin diamita na waje na bututu, gwiwar hannu, zagaye karfe da sauran kayan. Hakanan ana iya cewa diamita ne. Misali, Φ609.6mm yana nufin diamita na waje na 609.6mm.
Yanzu da muka gano me wadannan raka’o’i uku ke wakilta, me ya hada su?
Da farko dai, "Ma'anar "DN" kusan daidai yake da na DN, ma'ana yana nufin diamita mara kyau, yana nuna girman wannan ƙayyadaddun, kuma Φ shine hada biyun.
Misali: idan bututun karfe DN600 ne, kuma bututun karfe daya aka yi masa alama da inci, ya zama 24 inci. Shin akwai wata alaƙa tsakanin su biyun?
Amsar ita ce eh! Inci gabaɗaya shine ninka lamba kai tsaye da 25, wanda yayi daidai da DN, kamar 1″*25=DN25 2″*25=50 4″*25=DN100 da sauransu.
Tabbas, akwai kuma daban-daban, kamar 3″*25=75, wanda aka zagaya zuwa DN80 mafi kusa, da wasu inci tare da madaidaicin maki ko maki goma, kamar 1/2″ 3/4″ 1-1/4″ 1 -1/2 ″ 2-1 / 2″ 3-1/2 ″, da sauransu, ba za a iya lissafta waɗannan kamar haka ba, amma lissafin kusan iri ɗaya ne, asali ƙayyadaddun ƙimar:
1/2″=DN15 3/4″=DN20 1-1/4″=DN32 1-1/2″=DN40 2-1/2″=DN65 3-1/2″=DN90
Lokacin aikawa: Maris-10-2022
