Engineering ToolBox - Resources, Tools and Basic Information for Engineering and Design of Technical Applications!

This is an AMP page - Open full page! for all features.

• the most efficient way to navigate the Engineering ToolBox!

# Flash Steam Generation (bar)

## The amount of flash steam generated depends on steam pressure and pressure in the condensate lines.

The amount of flash steam generated depends on steam pressure - the pressure in the condensate just before it leaves the steam trap - and the pressure in the condensate lines after the steam trap.

The diagram and table below indicates the ratio of flash steam generated at different pressures before and after the condensate trap.

Flash Steam generated from Condensate (%)
Steam Gauge Pressure
(bar)
Condensate Gauge Pressure (bar)
01)0.511.522.53
0 0.0
1 3.8 1.7 0.0
2 6.3 4.2 2.6 1.2 0.0
3 8.3 6.2 4.5 3.2 2.0 0.8 0.0
4 9.8 7.7 6.1 4.8 3.6 2.4 1.7
5 11.2 9.1 7.5 6.2 5.0 3.8 3.1
6 12.3 10.3 8.7 7.4 6.3 5.0 4.3
7 13.4 11.4 9.8 8.5 7.4 6.2 5.4
8 14.4 12.3 10.8 9.5 8.4 7.2 6.5
9 15.2 13.2 11.7 10.4 9.3 8.1 7.4
10 16.1 14.1 12.5 11.3 10.1 9.0 8.3
11 16.8 14.8 13.3 12.0 10.9 9.8 9.1
12 17.5 15.6 14.1 12.8 11.7 10.5 9.8
13 18.2 16.3 14.8 13.5 12.4 11.2 10.6
14 18.9 16.9 15.4 14.2 13.1 11.9 11.2
15 19.5 17.6 16.1 14.8 13.7 12.6 11.9

1) It is common to vent condensate systems to the atmosphere - where the gauge pressure is 0 bar.

• 1 bar = 105 Pa (N/m2) = 10.197 kp/m2 = 10.20 m H2O = 0.9869 atm = 14.50 psi (lbf/in2)

### Example - Generated Flash Steam

A condensate system is vented to the surroundings and the pressure in the condensate system after the condensate traps is 0 bar gauge. The absolute steam pressure before the condensate trap is 10 bar gauge.

According the table above 16.1% of the condensate evaporates as flash steam after the trap.

Note! Without a flash recovery system the energy in the flash steam will be lost to the surroundings.

If you prefer Imperial units - go here!

## Related Topics

• Steam and Condensate - Steam & condensate systems- properties, capacities, pipe sizing, systems configuration and more.
• Flash Steam - Flash steam generation - thermodynamic fundamentals, heat loss, energy recovery and more.

## Search Engineering ToolBox

• the most efficient way to navigate the Engineering ToolBox!

## SketchUp Extension - Online 3D modeling!

Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your Sketchup model with the Engineering ToolBox - SketchUp Extension - enabled for use with the amazing, fun and free SketchUp Make and SketchUp Pro . Add the Engineering ToolBox extension to your SketchUp from the Sketchup Extension Warehouse!

## Privacy

We don't collect information from our users. Only emails and answers are saved in our archive. Cookies are only used in the browser to improve user experience.

Some of our calculators and applications let you save application data to your local computer. These applications will - due to browser restrictions - send data between your browser and our server. We don't save this data.

Temperature

oC
oF

Length

m
km
in
ft
yards
miles
naut miles

Area

m2
km2
in2
ft2
miles2
acres

Volume

m3
liters
in3
ft3
us gal

Weight

kgf
N
lbf

Velocity

m/s
km/h
ft/min
ft/s
mph
knots

Pressure

Pa (N/m2)
bar
mm H2O
kg/cm2
psi
inches H2O

Flow

m3/s
m3/h
US gpm
cfm

3 30