Annex I Units of Measure: Code elements listed by quantities - UNECE

Codes for Units of Measure used in International Trade
Units of Measure: Code elements listed by quantities
Quantity
Level
Cat.
Use
Id.
Name
Conversion factors to SI
units
(1 unit equals)
Represen.
Symbol
Cross
ref.
2 pound per hour lb/h 299
volume flow rate 1 cubic metre per second m ³ /s 300
1M cubic metre per hour m ³ /h 301
1M millilitre per second ml/s 302
1M millilitre per minute ml/min 303
1M litre per day 304
1S cubic centimetre per second cm ³ /s 305
1M kilolitre per hour kl/h 306
volume flow rate 1M litre per minute l/min 307
2 cubic foot per hour ft ³ /h 308
2 cubic foot per minute ft ³ /min 309
2 barrel per minute barrel
(US)/m
2 US gallon per minute gal(US)/min 311
2 Imperial gallon per minute gal(UK)/min 312
310
Heat
thermodynamic 1 kelvin K 314
temperature 2 degree Rankin 5
/9 K °R 315
celsius temperature 1 degree Celsius °C 316
fahrenheit temperature 2 degree Fahrenheit °F 317
linear expansion
coefficient,
cubic expansion
coefficient,
relative pressure
coefficient
1 reciprocal kelvin or kelvin
to the power minus one
K -¹ 318
pressure coefficient 1 pascal per kelvin Pa/K 319
isothermal
compressibility,
isentropic
compressibility
heat, quantity of heat,
energy,
1 reciprocal pascal or pascal
to the power minus one
Pa -¹ 320
1 joule J 321
thermodynamic energy, 2 British thermal unit 1055,056 J Btu 322
enthalpy, 2 X 15 °C calorie 4,185 5 J cal 15 323
Helmholtz function,
Helmholtz free energy
Gibbs function, Gibbs
free energy
2 X International Table (IT)
calorie
4,186 8 J cal IT 324
2 X thermochemical calorie 4,184 J (exactly) cal th 325
heat flow rate 1 watt W 326
1S kilowatt kW 327
2 British thermal unit per hour 0,293 071 1 N Btu/h 328
Recommendation 20 155