FRBH, FRBHX AND FRBHS USER INSTRUCTIONS ENGLISH 71569178 20-08
Page 28 of 60
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®
wooden form around the baseplate. For initial
grouting forms should be placed to isolate shims and
levelling nuts. The foundation surface should be
thoroughly saturated with water before grouting. A
typical mixture for grouting-in a pump base is
composed of one part pure Portland cement and two
parts of clean building sand with sufficient water to
provide the proper consistency. The grout should
flow freely but not be so wet as to cause the sand
and cement to separate.
Thoroughly puddle the grout while pouring to
eliminate air pockets and low spots. Pour sufficient
grouting to ensure that the bottom surface of the
baseplate is completely submerged. Do not fill
isolated areas around the shims or levelling nuts.
Once the grout has set sufficiently, remove the
wooden forms and finish off the sides and top as
desired. At the same time, roughen the grout surface
inside the baseplate. Cover with wet burlap and
allow the grout to cure for at least 40 hours.
After grouting has cured, shims and levelling nuts
should be removed or backed off. Tighten down
baseplate to the new grout to put bolts in tension and
ensure rigidity of structure. Install jam nuts and cut
the bolts to the desired length. Finish grouting
isolated areas. Fill the baseplate including pump and
driver support pedestals with concrete. Trowel and
slope the surface to give suitable drainage.
4.7
Piping
Protective covers are fitted to the pipe
connections to prevent foreign bodies entering during
transportation and installation. Ensure that these
covers are removed from the pump before
connecting any pipes.
4.7.1
Suction and discharge pipework
In order to minimize friction losses and hydraulic
noise in the pipework it is good practice to choose
pipework that is one or two sizes larger than the
pump suction and discharge. Typically main pipework
velocities should not exceed 2 m/s (6 ft/sec) suction
and 3 m/s (9 ft/sec) on the discharge.
Take into account the available NPSH that must be
higher than the required NPSH of the pump.
Never use the pump as a support for
piping.
Maximum forces and moments allowed on the pump
flanges vary with the pump size and type. To
minimize these forces and moments that may, if
excessive, cause misalignment, hot bearings, worn
couplings, vibration and the possible failure of the
pump casing, the following points should be strictly
followed:
•
Prevent excessive external pipe load
•
Never draw piping into place by applying force to
pump flange connections
•
Do not mount expansion joints so that their force,
due to internal pressure, acts on the pump flange
The table in 4.7.2 summarizes the maximum forces
and moments allowed on FRBH pump casings.
Refer to Flowserve for other configurations.
Ensure piping and fittings are flushed
before use.
Ensure piping for hazardous liquids is arranged
to allow pump flushing before removal of the pump.
4.7.2
Maximum forces and moments allowed on
FRBH pump flanges
Introduction:
API 610 has been used as a reference
for these pumps to establish the allowable forces and
moments. Typically values are 1X API. The values
shown in the table 4.7.2.2 are based on pumps
mounted on grouted baseplates. These values
should be factored based on material of construction
and temperature. The table 4.7.2.1 has been adopted
using data from ANSI/HI 9.6.2.6.
Table 4.7.2.1: Casing Material Correction Factors
Material Group No.
1.0
2.2
2.8
3.8
3.17
Ti
Temp. °C
Temp °F
CI/DI
316/317L
CD4MCUN
Hast. C
Worth/A20
Titanium
-29
-20
0.89
1.00
1.00
1.00
0.83
0.89
38
100
0.89
1.00
1.00
1.00
0.83
0.89
93
200
0.78
0.86
1.00
1.00
0.72
0.86
150
300
0.73
0.78
0.92
1.00
0.65
0.81
