# C019 – IP Paper 2/Table 54 Density Referral

## Description

This converts density values between standard conditions (1.01325 bar and 15°C) and other observed or line conditions.

## References

Kelton calculation reference C019

FLOCALC calculation reference F029

KIMS calculation reference K210

### C_{tl} The correction for the pressure of the liquid is calculated using

“Report on the Development, Construction, Calculation and Preparation of the ASTM-IP Petroleum Measurement Tables (ASTM D 1250; IP 200)”: First edition 1960, Reprinted 1962 and 1968.(see C219)

### C_{pl} The correction for the temperature of the liquid is calculated using

Institute of Petroleum, Petroleum Measurement Paper No. 2; Guidelines for users of the petroleum measurement tables (API Std 2540; IP 200; ANSI/ASTM D 1250) September 1984.(see C223)

## Options

### Solve for

- Standard density

Calculate the standard density from the density at a given pressure and temperature

- Density

Calculate the density at a given pressure and temperature from the standard density

### Precision

- Full

This enables you to bypass the rounding methods outlined in the algorithms and use the full precision during the calculation

- Rounding

Select this option to follow the algorithms to the in the standard

### Vapour Pressure

- Include

This option allows the entry of the vapour equilibrium pressure, If this is not selected the value of 1 standard atmosphere (101325 Pa) is assumed.

## Calculations

### Density

When solving for density the temperature correction according to Table 54 is applied followed by the pressure correction according to IP Paper 2.

### Standard Density

When solving for standard density an iterative calculation is performed making use of the Table 54 and IP Paper 2 algorithms. An initial estimate is taken for standard density based upon the entered density. This value is then fed into the Table 54 temperature correction algorithm to gain the C_{tl}. The estimate for standard density is then taken into the IP Paper 2 pressure correction algorithm to gain the C_{pl}. The C_{tl} and C_{pl} are then fed into the below formula to gain a new estimate of standard density. The process is repeated until standard density values converge to within 10^{-6}.