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Appendix 2
A Guide to Positioning Multipipes:
Vapac Humidity Control Ltd. Issue this as a guide only, and accept no responsibility for
the positioning of any pipes in a system. This remains the responsibility of the Project
Design Engineer.
Notes:
1
Steam pipe to have a minimum slope from
the horizontal of 7° or 12% to allow the
condensate to drain back to the cylinder or
trap.
NO HORIZONTAL RUNS. NO 90°
ELBOWS.
2
Water condensate tube to slope at 10° or
18% from the horizontal for condensate to
drain back to drain point. A suitably sized
trap will be required to prevent steam from
escaping via the condensate drain
connection.
3
Care should be taken to support steam hose
sufficiently such that no kinks are formed
which would flood with condensate causing
the bore of the tube to become constricted,
leading to excessive pressure in the steam
lines.
4
The duct should be clear of obstructions,
transformations and bends until the steam
has been absorbed into the airflow. Vapac
Humidity Control Ltd. Suggest a figure of 1.5
times the estimated absorbtion distance
stated on the “Multipipe” design sheet.
Which is supplied with the quotation.
5
Should it be necessary to slope the steam
hose away from the Vapac Boiler, it will be
necessary to fit a condensate separator to
remove the condensate at the lowest point.
This will need to be taken to a suitable drain.
October, 02
See note 1
See note 2
See note 2
