PORTATA IN VOLUME FLOW RATE BY VOLUME Unità base del sistema SI: metro cubo al secondo (m 3 /s) SI base unit: cubic metre per second (m 3 /s)
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1 PORTATA IN VOLUME FLOW RATE BY VOLUME Unità base del sistema SI: metro cubo al secondo (m 3 /s) SI base unit: cubic metre per second (m 3 /s) Unità di misura Simbolo m3/s m3/h L/s cm3/s cfm cfh gpm gph y3/min Unit of measurement Symbol m3/s m3/h L/s cm3/s cfm cfh gpm gph y3/min metro cubo al secondo m 3 /s l ,02x cubic metre per second metro cubo all ora m 3 /h 0,2778x10-3 l cubic metre per hour litro al secondo L/s litre per second centrimetro cubo al sec. cm 3 /s ,785x10-4 cubic centrimetre per sec. piede cubo al minuto cfm 0,4719x l cubic foot per minute piede cubo all ora cfh 0,7866x ,7866x l ,6 173x10-3 cubic footper hour gallone al minuto gpm 0,6309x l 60 4,951x10-3 gallon per minute gallone all ora gph 0,1052x ,785x10-3 0,1052x ,228x l 8,252x10-4 gallon per hour iarda cubica al minuto y 3 /min l cubic yard per minute Altri fattori di conversione per unità di misura di portata in volume Other conversion factors for unit of measurement of flow rate by volume Per passare da a moltiplicare per inversamente per To pass from to multiply by inversely for gallone / minuto (gpm) UK iarda cubica / minuto (yd 3 /min) 5,946x cubic yard / minute (yd3/min) gallone / minuto (gpm) UK litro / minuto (L/min) gallone / minuto (gpm) US litro - minuto (L/min) gallon / minute (gpm) US litre - minute (L/min) gallone / minuto (gpm) UK litro / secondo (L/s) 7,577x gallone / minuto (gpm) UK piede cubo / secondo (ft 3 /s) 2,676x cubic foot / second (ft3/s) gallone / minuto (gpm) US piede cubo / secondo (ft 3 /s) 2,228x gallon / minute (gpm) US cubic foot / second (ft3/s) gallone / ora (gph) UK litro / minuto (L/min) 7,577x gallon / hour (gph) UK gallone / ora (gph) UK litro / secondo (L/s) 1,2628x gallon / hour (gph) UK gallone / secondo (gps) UK litro / minuto (L/min) ,666x10-3 gallone / secondo (gps) US litro / minuto (L/min) ,4029x10-3 gallone / secondo (gps) UK litro / secondo (L/s) gallone / secondo (gps) US litro / secondo (L/s) gallone / secondo (gps) UK piede cubo / minuto (cfm) cubic foot / minute (cfm) gallone / secondo (gps) US piede cubo / minuto (cfm) cubic foot / minute (cfm) piede cubo / secondo (cfs) litro / secondo (L/s) ,5316x10-2 cubic foot / second (cfs) pollice cubo / minuto (cim) litro / secondo (L/s) 0,2731x cubic inch / minute (cim)
2 Unità base del sistema SI: watt (W) SI base unit: watt (W) POTENZA (meccanica, elettrica e termica) POWER (mechanical, electrical and thermal) Unità di misura Simbolo W kcal/h kgm/s Btu/h ft Ib/s BHP CV ton (UK) ton (US) Unit of measurement Symbol W kcal/h kgm/s Btu/h ft Ib/s BHP CV ton (UK) ton (US) watt W ,341x10-3 1,360x10-3 0,284x10-3 0,318x10-3 watt chilocaloria/ora kcal/h ,559x10-3 1,581x10-3 0,331x10-3 0,370x10-3 kilocalorie/hour chilogrammetro/sec kgm/s ,315x10-2 1,333x10-2 2,788x10-3 3,123x10-3 kilogrammetre/sec British thermal unit/hour BTU/h ,393x10-3 0,398x10-3 0,833x10-4 0,933x10-4 British thermal unit/hour libbra piede/secondo ft 1b/s ,818x10-3 1,844x10-3 0,386x10-3 0,432x10-3 foot pound /seconds cavallo vapore (UK) BHP horse power (UK) cavallo vapore CV horse power ton (raffreddamento UK) ton (UK) ton (cooling UK) ton (raffreddamento US) ton (US) ton (cooling US) VELOCITA' VELOCITY Unità base del sistema SI: metro al secondo (m/s) SI base unit: metre per second (m/s) Unità di misura Simbolo m/s m/min cm/s ft/s ft/min km/h Ml/h MI/h Unit of measurement Symbol terreno nautico UK knt metro al secondo m/s metre per second metro al minuto m/min ,728x10-2 3,238x10-2 3,240x 10-2 metre per minute centimetro al secondo cm/s centimetre per second piede al secondo ft/s foot per second piede al minuto ft/rnin 0,508x ,829x10-2 1,136x10-2 0,987x10-2 0,987x10-2 foot per minute chilometro all ora km/h kilometre per hour miglio all ora (terreno) Ml/h mile per hour (land) miglio all ora (nautico UK) Ml/h mile per hour (nautical UK) nodo knt knot
3 Unità base del sistema SI: pascal (Pa) = N/m 2 SI base unit: pascal (Pa) = N/m 2 PRESSIONE PRESSURE Unità di misura Simbolo Pa bar at mmhg kgf/m2 psi Ibf/ft2 in w. in Hg ft w. Unit of measurement Symbol Pa bar at mmhg kgf/m2 psi Ibf/ft2 in w. in Hg ft w. pascal Pa ,0197x ,145x ,295x10-3 0,335x10-3 pascal bar bar bar atmosfera = kgf/cm2 at atmosphere kgf/cm2 millimetri di Hg mm Hg 133,32 1,3332x10-3 1,3595x ,595 0,0193 1,392 0,5353 0,0394 0,0446 millimetres Hg chilogrammi per m2 kgf/m2 9,807 9,807x , , ,205 0,0394 0,0029 0,0033 kilograms per m2 libbre per pollice quadro psi 6894,14 0, , , ,683 2,0362 2,3069 pounds per square inch libbre per piede quadro Ibf/ft2 47,876 4,7876x10-4 4,8824x10-4 0,7183 4,8824 0, ,1922 0, ,01602 pounds per square foot pollici di c.a. in w. 249,09 0, , ,868 25,4 0, ,03 1 0, ,0833 inches W.G. pollici di mercurio in Hg 3386,36 0, , ,4 345,34 0, ,731 13, ,29 inches Mercury piedi di c.a. ft w , , ,42 304,8 0, , , feet W.G. Altri fattori di conversione per unità di misura di pressione Other conversion factors for unit of pressure measurement Per passare da a moltiplicare per inversamente per To pass from to multiply by inversely for atmosfera fisica (atm) bar (1 bar = 10 5 N/m 2 ) bar (1 bar = 105 N/m3) atmosfera fisica (atm) piedi di c.a. (a 4 C) ,950x10-2 feet W.G. (at 4 C) atmosfera fisica (atm) pollici di mercurio (a 0 C) ,342x10-2 inches, mercury (at O C) atmosfera fisica (atm) kg f /cm 2 (atmosfera tecnica) kg/cm2 (technical atmosphere) atmosfera fisica (atm) kg f /m 2 (=mm di c.a.) kg/m2 (=mm W.G.) ,678x10-5 atmosfera fisica (atm) millimetri di mercurio (mm Hg) 760 1,316x10-3 millimetres, mercury (mm Hg) atmosfera fisica (atm) libbra / pollice quadro (psi) ,803x10-2 pound / square inch (psi) atmosfera fisica (atm) tonnellata / piede quadro (UK) ton / square foot (UK) chilogrammo (kgf/m 2 ) atmosfera fisica (atm) 9,678x10-5 1,033x10 5 kilogram grammo/centimetro quadro (g/cm 2 ) pascal (Pa=N/m 2 ) ,0197x10-2 pascal (Pa=N/m') grammo/centimetro quadro (g/cm 2 ) libbra / piede quadro (lb f /ft 2 ) pound / square foot (Ib/ft) grammo/centimetro quadro (g/cm 2 ) libbra / pollice quadro (psi) pound / square inch (psi) oncia/pollice quadro (oz/in 2 ) libbra/pollice quadro (psi) ounce/square inch (oz/in2) pound/square inch (psi) oncia/pollice quadro (oz/in 2 ) millimetri di c.a. (mm H 2 O=kg f /m 2 ) ounce/square inch (oz/in2) millimetres W.G. (mm H2O=kg/m2) ,276x10-2 oncia/pollice quadro (oz/in 2 ) pascal (Pa=N/m 2 ) ,320x10-3 ounce/square inch (oz/in2) 2 pollici di c.a. (in w.) atmosfera fisica (atm) 2,459x10-3 0,4067x10 3 inches W.G. (in w.) pollici di c.a. (in w.) oncia/pollice quadro (oz/in 2 ) inches W.G. (in w.) ounce/square inch (oz/in')
4 PREFISSI DEL SISTEMA INTERNAZIONALE PREFIXES IN THE INTERNATIONAL SYSTEM PREFISSO SIMBOLO MULTIPLO NUMERICO MULTIPLO ESPONENZIALE PREFIX SYMBOL NUMERIC MULTIPLE EXPONENTIAL MULTIPLE più grandi di 1 / greater than 1 tera T giga G mega M * kilo k etto h deca da più piccoli di l / smaller than l * deci d * centi c * milli m * micro µ * nano n pico p 0, femto f 0, atto a 0, I prefissi del SI contrassegnati con asterisco sono comunemente usati / The SI prefixes marked with an asterisk are commonly used.
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