He aha ka "inihi": ʻO ka ʻīniha (") kahi ʻāpana kikoʻī maʻamau no ka ʻōnaehana ʻAmelika, e like me nā paipu kila, nā ʻili, nā flanges, nā kuʻekuʻe, nā pamu, nā kī, a me nā mea ʻē aʻe, e like me ka kikoʻī he 10″.
ʻīnihaes (ʻīniha, pōkole e like me ka.) ʻo ia ka manamana lima ma ka ʻōlelo Holani, a ʻo hoʻokahi ʻīniha ka lōʻihi o ka manamana nui. ʻOiaʻiʻo, ʻokoʻa ka lōʻihi o ka manamana lima kanaka. I ke kenekulia 14, ua hoʻopuka ʻo King Edward II i ka "ʻīniha kānāwai maʻamau".
Ua ʻōlelo ʻia ʻo ka lōʻihi o nā hua nui ʻekolu i koho ʻia mai ka waena o ka hua bale a hoʻonohonoho ʻia i ka lālani he hoʻokahi ʻīniha.
ʻO ka maʻamau 1″=2.54cm=25.4mm
He aha ka DN: ʻO DN kahi ʻāpana kikoʻī maʻamau i hoʻohana ʻia ma nā ʻōnaehana Kina a me ʻEulopa. He kikoʻī nō hoʻi ia no ka ʻike ʻana i nā paipu, nā valves, nā flanges, nā paipu paipu a me nā pā, e like me DN250.
ʻO ka DN e pili ana i ke anawaena inoa o ka paipu (ʻike pū ʻia ʻo ka anawaena inoa), e hoʻomaopopo: ʻaʻole kēia ke anawaena o waho a i ʻole ka anawaena o loko, ʻo ia ka awelika o ke anawaena o waho a me ke anawaena o loko, i kapa ʻia ʻo ka awelika o loko.
He aha ka Φ: ʻO Φ kahi hui maʻamau, e pili ana i ke anawaena o waho o nā paipu, nā kuʻekuʻe, ke kila poepoe a me nā mea ʻē aʻe. Hiki ke ʻōlelo ʻia he anawaena. No ka laʻana, pili ka Φ609.6mm i ke anawaena o waho o 609.6mm.
I kēia manawa ua ʻike mākou i ke ʻano o kēia mau ʻāpana ʻekolu, he aha ka pilina ma waena o lākou?
ʻO ka mea mua, "ʻaneʻane like ka manaʻo o "DN" me ka DN, ʻo ia hoʻi ke ʻano o ke anawaena nominal, e hōʻike ana i ka nui o kēia kikoʻī, a ʻo Φ ke hoʻohui i nā mea ʻelua.
No ka laʻana: inā he DN600 ka paipu kila, a ua kaha ʻia ka paipu kila like me nā iniha, lilo ia i 24″. Aia kekahi pilina ma waena o lāua?
ʻAe ka pane! ʻO ka ʻīniha maʻamau ka hoʻonui pololei ʻana o ka integer me 25, ua like ia me DN, e like me 1″*25=DN25 2″*25=50 4″*25=DN100 a pēlā aku.
ʻOiaʻiʻo, aia kekahi mau mea like ʻole, e like me 3″*25=75, i hoʻopuni ʻia i ka DN80 kokoke loa, a me kekahi mau iniha me nā semicolons a i ʻole nā helu decimal, e like me 1/2″ 3/4″ 1-1/4″ 1 -1/2″ 2-1 /2″ 3-1/2″, a me nā mea ʻē aʻe, ʻaʻole hiki ke helu ʻia kēia mau mea e like me ia, akā ʻano like ka helu ʻana, ʻo ka waiwai i kuhikuhi ʻia:
1/2″=DN15 3/4″=DN20 1-1/4″=DN32 1-1/2″=DN40 2-1/2″=DN65 3-1/2″=DN90
Ka manawa hoʻouna: Mar-10-2022
