He aha te "inihi": Ko te inihi (") he waeine whakatakotoranga noa mō te pūnaha o Amerika, pērā i ngā paipa maitai, ngā takirere, ngā flanges, ngā tuke, ngā papu, ngā tī, me ētahi atu, pērā i te whakatakotoranga he 10″.
Inihies (inihi, whakarāpopototia hei.) ko tōna tikanga he koromatua i te reo Tatimana, ā, ko te inihi te roa o te koromatua. He rerekē anō hoki te roa o te koromatua tangata. I te rautau 14, i whakaputa a Kingi Edward II i te "inihi ture paerewa".
Kua whakaritea kia kotahi inihi te roa o ngā witi nui rawa e toru i tīpakohia mai i waenganui o te puku parei, ā, i whakaritea kia rarangi.
Ko te tikanga 1″=2.54cm=25.4mm
He aha te DN: He waeine whakatakotoranga e whakamahia whānuitia ana te DN i roto i ngā pūnaha Hainamana me Ūropi. He whakatakotoranga anō hoki mō te tautuhi i ngā paipa, ngā takirere, ngā flanges, ngā hononga paipa me ngā papu, pērā i te DN250.
Ko te DN e pā ana ki te diameter ingoa o te paipa (e mōhiotia ana ko te diameter ingoa), kia mōhio: ehara tēnei i te diameter o waho, ehara hoki i te diameter o roto, ko te toharite o te diameter o waho me te diameter o roto, e kiia ana ko te diameter o roto toharite.
He aha te Φ: He waeine whānui te Φ, e pā ana ki te diameter o waho o ngā paipa, ngā tuke, te maitai porowhita me ētahi atu rauemi. Ka taea hoki te kī he diameter. Hei tauira, ko te Φ609.6mm e pā ana ki te diameter o waho o te 609.6mm.
Nā te mea kua mārama tātou ki te tikanga o ēnei waeine e toru, he aha te hononga i waenganui i a rātou?
Tuatahi, "He rite tonu te tikanga o te kupu 'DN' ki te tikanga o te kupu 'DN', ko tōna tikanga ko te diameter ingoa, e tohu ana i te rahi o tēnei whakatakotoranga, ā, ko te Φ hei whakakotahi i ngā mea e rua."
Hei tauira: mēnā he DN600 te rahi o tētahi paipa maitai, ā, kua tohua taua paipa maitai ki ngā inihi, ka huri hei 24 inihi. He hononga kei waenganui i ngā mea e rua?
Ko te whakautu he āe! Ko te inihi whānui ko te whakarea tika o te tauoti ki te 25, he ōrite ki te DN, pērā i te 1″*25=DN25 2″*25=50 4″*25=DN100 me ērā atu.
Heoi anō, he rerekē anō hoki ētahi, pērā i te 3″*25=75, kua whakaawhiwhia ki te DN80 tata, me ētahi inihi me ngā ira-piko, ngā ira-ira rānei, pērā i te 1/2″ 3/4″ 1-1/4″ 1-1/2″ 2-1 /2″ 3-1/2″, me ētahi atu, kāore e taea te tatau pēnei, engari he rite tonu te tatau, ko te uara kua tohua:
1/2″=DN15 3/4″=DN20 1-1/4″=DN32 1-1/2″=DN40 2-1/2″=DN65 3-1/2″=DN90
Wā tuku: Maehe-10-2022
