Category: Technical information associated with Spirax Sarco Steam
Pipe Sizing Condensate Pipe Sizing
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Spirax-Sarco Limited Steam & Condensate Pipe Sizing
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.

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
The Release of Flash Steam

Technical information associated with: Spirax Sarco - Steam Generators,
Traps, Valve Actuators & Trapping Stations
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Spirax-Sarco Limited
Charlton House
Cheltenham
Gloucestershire
GL53 8ER
Tel: 01242 521361
Fax: 01242 573342 |