Installing Upright Stand Pipes; Sampling Holes - Siemens FDA241 Planning, Mounting

4.15 Installing upright stand pipes

4.16 Sampling Holes

Building Technologies
Fire Safety
In many cavities or ducts, lines or cables prevent the air from flowing freely to the
aspirating holes in the pipes. In such cases, there must not be any aspirating holes
in the pipes. Upright stand pipes can be used to take in the air without any
obstructions.
Aspirating holes in pipes
Aspirating holes typically have a diameter of 3 mm when the pipe is more than
20 m long. In the case of shorter pipes, the aspirating holes are generally larger
than this. To achieve a balanced intake of air throughout the entire pipe system,
use the 'FXS2056 ASD Asyst Tool V2' software to calculate the exact diameter
required for the aspirating holes.
Aspirating holes in end caps
The end caps of the pipes also have aspirating holes in them. The size of the
aspirating holes is used to align the airflows of the individual pipes with one
another.
Exception: The end caps on the upright stand pipes do not have any holes in them.
Planning
Installing upright stand pipes
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2017-09-12