# C299 – ISO 8222 Annex A – Density of Water

## Description

This calculates the density of water according to the calculation laid out in Annex A of ISO 8222.

## References

ISO 8222 – Petroleum measurement systems – Calibration – Temperature corrections for use when calibrating volume proving tanks

Kelton calculation reference C299

FLOCALC calculation reference F097

KIMS calculation reference K230

## Options

### Water Choice

- Air free water
- Air saturated water

This option is used to select whether the correction for air saturated water is made or not.

## Calculation

### Density of Air-Free Water

The density of air-free water is calculated by:

Where | ||
---|---|---|

ρ_{0} |
= | 999.97358 (Maximum density of water (at t_{0})) |

t_{0} |
= | 3.9818°C |

A | = | 7.0134 x 10^{-8} °C^{-1} |

B | = | 7.926504 x 10^{-6} °C^{-2} |

C | = | -7.575677 x 10^{-8} °C^{-3} |

D | = | 7.314894 x 10^{-10} °C^{-4} |

E | = | -3.596458 x 10^{-12} °C^{-5} |

### Correction for Air-Saturated Water

The correction for air-saturated water is:

This is then added onto the density of air free water to give the density for air saturated water.