Spirax Sarco - Steam & Condensate Pipe Sizing

Steam - Condensate Pipe Sizing - Flash Steam Release

Capacity of Steam Pipes in kg/h

Practical experience shows that reasonable velocities for dry saturated steam mains are 25-40m/s. Longer branch lines should be restricted to a velocity below 15m/s unless the pressure drop is also calculated.

Technical Data

Capacity of Condensate Pipes in kg/h

For condensate pipe sizing, use the starting load which will in most cases be about twice the running load. This will make allowance for flash steam and avoid high back pressure on start up.

Size the line on a resistance of 1.4 mbar per metre of travel for steam pressure up to 10 bar. For higher pressures, increase the pipe size to allow for larger volumes of flash steam.

Approximate Frictional Resistance in mbar per m Travel

Technical Data

The Release of Flash Steam

Technical Data

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Spirax-Sarco Limited
Charlton House
Cheltenham
Gloucestershire
GL53 8ER

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Tel: 01242 521361
Fax: 01242 535277

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