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

Flash Steam Generation - Imperial Units (psig)

When condensate passes steam traps - flash steam is generated.

Sponsored Links

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

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

Flash steam generation diagram - in psig

Flash Steam generated from Condensate (%)
Steam Pressure before the Steam Trap
(psig)
Condensate Pressure after the Trap (psig)
01)2510152030406080100
5 1.7 1
10 2.9 2.2 1.4
15 4 3.2 2.4 1.1
20 4.9 4.2 3.4 2.1 1.1
30 6.5 5.8 5 3.8 2.6 1.7
40 7.8 7.1 6.4 5.1 4 3.1 1.3
60 10 9.3 8.6 7.3 6.3 5.4 3.6 2.2
80 11.7 11.1 10.3 9 8.1 7.1 5.5 4 1.9
100 13.3 12.6 11.8 10.6 9.7 8.8 7 5.7 3.5 1.7
125 14.8 14.2 13.4 12.2 11.3 10.3 8.6 7.7 5.2 3.4 1.8
160 16.8 16.2 15.4 14.1 13.2 12.4 10.6 9.5 7.4 5.6 4
200 18.6 18 17.3 16.1 15.2 14.3 12.8 11.5 9.3 7.5 5.9
250 20.6 20 19.3 18.1 17.2 16.3 17.7 13.6 11.2 9.8 8.2
300 22.7 21.8 21.1 19.9 19 18.2 16.7 15.4 13.4 11.8 10.1
350 24 23.3 22.6 21.6 20.5 19.8 18.3 17.2 15.1 13.5 11.9
400 25.3 24.7 24 22.9 22 21.1 19.7 18.5 16.5 15 13.4

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

  • 1 psi (lb/in2) = 6,894.8 Pa (N/m2) = 6.895x10-3 N/mm2 = 6.895x10-2 bar

Example - Generated Flash Steam

A condensate system is vented to the surroundings and the pressure in the condensate return system after the steam traps is therefore 0 psig (atmospheric pressure).  The steam pressure before the steam traps is 160 psig.

According the table above 16.8% of the condensate evaporates as flash steam passing the traps.

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

If you prefer SI units - go here!

Sponsored Links

Related Topics

Related Documents

Sponsored Links

Engineering ToolBox - SketchUp Extension - Online 3D modeling!

3D Engineering ToolBox Extension to SketchUp - add parametric components to your SketchUp model

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 Pro Sketchup Extension Warehouse!

Translate
About the Engineering ToolBox!

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.

Google use cookies for serving our ads and handling visitor statistics. Please read Google Privacy & Terms for more information about how you can control adserving and the information collected.

AddThis use cookies for handling links to social media. Please read AddThis Privacy for more information.

Citation

This page can be cited as

  • Engineering ToolBox, (2003). Flash Steam Generation - Imperial Units (psig). [online] Available at: https://www.engineeringtoolbox.com/flash-steam-generation-d_278.html [Accessed Day Mo. Year].

Modify access date.

. .

close

3D Engineering ToolBox - draw and model technical applications! 2D Engineering ToolBox - create and share online diagram drawing templates! Engineering ToolBox Apps - mobile online and offline engineering applications!

Scientific Online Calculator

Scientific Calculator

3 30

Sponsored Links
.