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6.3 Planning the pipes
6.3.1 Specifying supports and flange
connections
1.
When planning pipe runs take every possible operating
condition into account:
–
Cold/warm medium
–
Empty/full
–
Unpressurized/pressurized
–
Positional change of the flanges
2.
Ensure that the pipe supports are designed to accommodate
any movement from environmental or pressure imposed
forces.
6.3.2 Specifying nominal diameters
Keep the flow resistance in the pipes as low as possible.
Pipework immediately connected to both inlet and outlet
port of the pump should be straight runs for at
least 1 metre.
Ensure that nominal pipe diameter is at least 1.5 times
nominal pump-hose diameter to reduce pulsation.
6.3.3 Specifying pipe lengths
1.
Keep pipework as short and direct as possible.
2.
To allow easy access when changing hoses, include
a short, removable section adjacent to the port
flanges.
6.3.4 Optimizing cross-section of pipework
1.
Avoid
bending
(r - the radii of nominal piping).
2.
Avoid abrupt changes of cross-section along the piping.
6.3.5 Providing safety and control devices
(recommended)
Making provisions for isolating and shutting off pipes
For maintenance and repair work.
Provide shut-off valves in the suction and discharge lines.
X
Allowing safe removal of product
Include drainage taps in suction and discharge lines at
X
the lowest point.
Original instructions (en)
radii
of
less
than
© Verder Liquids B.V
Dura 55 series - Operating manual
Dos
1. Short pipe run to
suction side
2. Reduced Joints/Bends
3. Connecting pipe with
diameter 1.5 times pump
hose diameter
Pipe ID 1.5 times hose ID
10r
4. Pulsation dampener
connected close
to the pump
Pulsation Dampener
Bellows
Table 4. - Dos and don'ts
Version 01
Don'ts
Long pipe run to suction
side
Multiple Joints/Bends
Connecting pipe with
smaller than pump hose
diameter
Pipe ID < pump hose ID
Pulsation dampener
connected away from
pump
10% loss in dampener
efficiency for every meter
14 | Page
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