Ico ari co “inch”: Inch (“) ni ikigereranyo gisanzwe c’ubuhinga bwa Amerika, nk’imiyoboro y’icuma, amavalve, amaflanse, ibikokora, amapompo, amatee, n’ibindi, nk’ikigereranyo ni 10′′.
Incies (inch, mu buryo bugufi ngo in.) bisobanura urukumu mu giholandi, kandi inch imwe ni uburebure bw’urukumu. Ego ni ko, uburebure bw’igikumwe c’umuntu na bwo nyene buratandukanye. Mu kinjana ca 14, Umwami Edouard wa II yarasohoye “inch legal standard”.
Bitegekanijwe ko uburebure bw’intete zitatu nini cane zitorwa hagati mu gutwi kwa sayiri zigashirwa mu murongo ari inci imwe.
Muri rusangi 1′′=2.54cm=25.4mm
DN ni iki: DN ni igice gikoreshwa cane mu mirongo y’ivy’ubuhinga bw’Abashinwa n’Abanyaburaya. Ni n’ikimenyetso co kumenya imiyoboro, amavalve, amaflanche, ibikoresho vy’imiyoboro n’amapompo, nka DN250.
DN yerekeza ku murongo w’izina w’umuyoboro (uzwi kandi nk’umurongo w’izina), iciyumviro: uwo si umurongo w’inyuma canke umurongo w’imbere, ni umurongo w’inyuma n’umurongo w’imbere, witwa umurongo w’imbere w’imbere.
Φ ni iki: Φ ni igipimo rusangi, kikaba kivuga umurongo w’inyuma w’imiyoboro, ibikokora, ivyuma bizunguruka n’ibindi bikoresho. Bishobora kandi kuvugwa ko ari umurongo. Nk’akarorero, Φ609.6mm yerekeza ku murongo w’inyuma w’uburebure bwa 609.6mm.
None ko twamenye ico ivyo bice bitatu bigereranya, ni isano irihe bifitaniye?
Mbere na mbere, “Insobanuro ya “DN” ni hafi imwe n’iya DN, mu bisanzwe bisobanura umurongo w’izina, vyerekana ubunini bw’ivyo bisobanuro, kandi Φ ni uguhuza ivyo bibiri.
Nk’akarorero: iyo umuyoboro w’icuma ari DN600, kandi uwo muyoboro w’icuma nyene ukaba ufise ikimenyetso c’inci, uba 24′′. Hoba hari isano hagati y’ivyo bibiri?
Inyishu ni egome! Inch rusangi ni ugukubita ataco uhinduye kw’umubare wose na 25, ukaba ungana na DN, nk’akarorero 1′′*25=DN25 2′′*25=50 4′′*25=DN100 n’ibindi.
Ego cane, hariho kandi zitandukanye, nka 3′′*25=75, zikikujwe ku DN80 iri hafi, n’inci zimwe zimwe zifise uturongo tw’inyuguti canke uturongo tw’icumi, nka 1/2′′ 3/4′′ 1-1/4′′ 1-1/2′′ t etc, izo zishobora kuba, 2-1 /21/2. biharuriwe gutyo, ariko ibiharuro ni nk'ivyo nyene, ahanini agaciro kavuzwe:
1/2"=DN15 3/4"=DN20 1-1/4"=DN32 1-1/2"=DN40 2-1/2"=DN65 3-1/2"=DN90
Igihe co gutangaza: Ntwarante-10-2022
