Condensate Line Sizing.xls

Pipe Diameter Mass Flow Rate of Condensate Condensate Pressure Before Flashing Flasher Condesate Header Pressure

14 Inch 120000 Kg/hr

264552 lb/hr

40 Kg/cm2G

583.143 psia

5 Kg/cm2G

85.338 psia

Constant A

0.198495

Constant X

2.317087

Constant B

0.009815

Weight Fraction of Condensate flashed to Vapour

0.199555

Flashed Steam Flow Rate

23946.59 Kg/hr

52792.65 lb/hr

Flashed Condensate Liquid Flow

96053.41 Kg/hr

211759.4 lb/hr

Temperature of Flashed Condensate

253.2732 ° C

487.8917 ° F

Flashed Steam Density

3.009158 kg/m3

0.187849 lb/ft3

Flashed Condensate Liquid Density

910.8139 kg/m3

56.85835 lb/ft3

Density of Mixture (Flashed Condensate/Steam)

14.88213 kg/m3

0.92903 lb/ft3

For Turbulent Flow Friction Factor

0.012571

Pressure Drop of Flashed Condensate mixture

0.591644 psi/100ft

Velocity of Flashed Condensate mixture

4437.05 ft/min

Line Size is adequate

Assumptions: 1. Most of the flow patterns for steam condensate headers fall within the annular or dispersed region on the baker map. Rarely flow pattern falls in slug flow region. 2. Flashed steam is less than 30% by weight. 3. Vapour-liquid mixture throughout the condensate line is represented by mixture conditions near the end of the line. Method: 1. Amount of condensate flashed is calculated. 2. Further to above the density of the mixture (condensate+flashed steam) is found out. 3. Using two pressure drop correlations, pressure per 100 ft. is calculated. 4. Also, the velocity of the mixture in the line of specified size is calculated. If the velocity is lower than 5000 Foot/Min., the specified line size is said to be adequate.