Say siglaotan na saray detalye na DN, Φ tan pulgada.

Antoy “pulgada”: Say pulgada (") et sakey a kaslakan ya yunit na detalye parad sistema na Amerika, singa saray tubo ya asero, balbula, flange, siko, bomba, tee, tan arum ni, a singa say detalye et 10′′.

Pulgadaes (pulgada, pinatikeyan ya in.) et mankabaliksan na thumb ed Dutch, tan sakey pulgada so karukey na thumb. Siempre, nanduruma met so karukey na thumb na too. Nen koma-14 a siglo, si King Edward II so angipaway na “standard legal inch”.

Nibaga ya say karukey na taloran sankabalgan ya bukel ya pinili manlapud pegley na sebada tan inuksoy ed sakey a hilera et sakey pulgada.

Kaslakan et 1′′=2.54cm=25.4mm

Anto so DN: Say DN et kaslakan ya uusaren ya specification unit ed saray sistema na China tan Europe. Saya met so sakey a detalye parad pakabidbiran na saray tubo, balbula, flange, pipe fittings tan bomba, a singa say DN250.

Say DN et manutukoy ed nominal a diametro na tubo (ya tatawagen met ya nominal a diametro), tandaan: aliwan saya so paway a diametro odino say loob a diametro, saya so average na paway a diametro tan say loob a diametro, a tatawagen ya average ya loob a diametro.

Anto so Φ: Say Φ et sakey a pangkabilugan a yunit, ya manutukoy ed paway a diametro na saray tubo, siko, malimpek ya asero tan arum niran materyales. Nayarin ibaga met ya diametro. Singa bilang, say Φ609.6mm et manutukoy ed paway a diametro ya 609.6mm.

Natan ta naamtaan tayo la no antoy irerepresenta na sarayan taloran yunit, antoy koneksion da?

Unona ed amin, “Say kabaliksan na “DN” et ngalngalin pareho ed DN, say manunan kabaliksan to et say nominal a diametro, ya mangipapanengneng na kabaleg na sayan detalye, tan say Φ et pian pankasakeyen so duara.

Singa bilang: no say sakey a tubo ya asero et DN600, tan say parehon tubo ya asero et walay marka ton pulgada, magmaliw itan ya 24′′. Wala kasi koneksion na saratan a dua?

Say ebat et on! Say inkalapagan a pulgada et say direktan panagmultiplika na integer ed 25, ya mipara ed DN, a singa say 1′′*25=DN25 2′′*25=50 4′′*25=DN100 tan arum nira.

Siempre, wala met iray nanduruman klase, singa say 3′′*25=75, ya binilog ed sankaasinggeran ya DN80, tan pigaran pulgada ya walay semicolon odino decimal points, singa say 1/2′′ 3/4′′ 1-1/4′′ 1-1/2′′ 2-1/4′′ 1-1/2′′ 2-1 /2′′ 3-1/2′′, tan arum ni, et ag nayarin kalkulaen a singa saraya. balet say kalkulasyon et ngalngalin pareho, diad tua et say nibaga ya balor:

1/2′′=DN15 3/4′′=DN20 1-1/4′′=DN32 1-1/2′′=DN40 2-1/2′′=DN65 3-1/2′′=DN90