Nea ɛyɛ “inch”: Inch (“) yɛ ade a wɔtaa de kyerɛ Amerika nhyehyɛe no, te sɛ dade paipu, valve, flanges, elbows, pumps, tees, ne nea ɛkeka ho, te sɛ nea nkyerɛkyerɛmu no yɛ 10′′.
Inches (inch, wɔatwa no tiawa sɛ in.) kyerɛ nsateaa wɔ Dutch kasa mu, na nsateakwaa biako yɛ nsateaa tenten. Nokwarem no, ɛsono sɛnea onipa nsateaa tenten nso yɛ soronko. Wɔ afeha a ɛto so 14 mu no, Ɔhene Edward II de “mmara kwan so nsateakwaa a wɔahyɛ da ayɛ” mae.
Wɔahyɛ sɛ aburow akɛse abiɛsa a wɔpaw fi atoko aso mfinimfini na wɔahyehyɛ no nnidiso nnidiso no tenten yɛ nsateakwaa biako.
Mpɛn pii no, ɛyɛ 1′′=2.54cm=25.4mm
Dɛn ne DN: DN yɛ specification unit a wɔtaa de di dwuma wɔ China ne Europa nhyehyɛe ahorow mu. Ɛsan nso yɛ nkyerɛkyerɛmu a wɔde kyerɛ paipu, valve, flanges, pipe fittings ne pumps, te sɛ DN250.
DN kyerɛ paipu no ntwemu a wɔfrɛ no (a wɔsan frɛ no din mu ntwemu), hyɛ no nsow: eyi nyɛ akyi ntwemu anaasɛ emu ntwemu, ɛyɛ akyi ntwemu ne emu ntwemu no nkyɛmu, a wɔfrɛ no mu ntwemu.
Nea ɛyɛ Φ: Φ yɛ ade titiriw, a ɛkyerɛ paipu, nsateaa, dade kurukuruwa ne nneɛma afoforo akyi ntwemu. Yebetumi aka nso sɛ ɛyɛ diameter. Sɛ nhwɛso no, Φ609.6mm kyerɛ akyi ntwemu a ɛyɛ 609.6mm.
Seesei a yɛahu nea saa akuw abiɛsa yi gyina hɔ ma no, abusuabɔ bɛn na ɛda wɔn ntam?
Nea edi kan koraa no, “Ɛkame ayɛ sɛ “DN” ntease ne DN de no yɛ pɛ, ne titiriw no ɛkyerɛ ne ntwemu a wɔfrɛ no diameter, a ɛkyerɛ sɛnea saa nkyerɛkyerɛmu yi kɛse te, na Φ yɛ sɛ wɔbɛka abien no abom.
Sɛ nhwɛso no: sɛ dade paipu yɛ DN600, na wɔde nsateakwaa ahyɛ dade paipu koro no ara agyirae a, ɛbɛyɛ 24′′. So abusuabɔ bi wɔ abien no ntam?
Mmuae no ne yiw! Inch a ɛwɔ hɔ nyinaa yɛ integer no dodow tẽẽ 25, a ɛne DN yɛ pɛ, te sɛ 1′′*25=DN25 2′′*25=50 4′′*25=DN100 ne nea ɛkeka ho.
Nokwarem no, ɛsono emu biara nso, te sɛ 3′′*25=75, a wɔayɛ no kurukuruwa akodu DN80 a ɛbɛn no so, ne nsateakwaa bi a wɔde semicolon anaa decimal points, te sɛ 1/2′′ 3/4′′ 1-1/4′′ 1-1/2′′ 2-1 /2′′ 3-1/2′′ 2-1 /2′′ 3-1/2′′, ne nea ɛkeka ho, eyinom ntumi mmu akontaa saa, nanso... akontaabu no bɛyɛ sɛ ade koro, titiriw no, ɛsom bo a wɔakyerɛ:
1/2′′=DN15 3/4′′=DN20 1-1/4′′=DN32 1-1/2′′=DN40 2-1/2′′=DN65 3-1/2′′=DN90
Bere a wɔde bɛkyerɛw: Mar-10-2022
