Page 128 - Machinery Component Maintenance

Machinery Foundations und Grouting I I1

started early in the morning while the baseplate is level. Levels should be
verified after the baseplate temperature has stabilized overnight. Note
that the baseplate should be shielded from direct sunlight for 24 hours
prior to epoxy grouting and 48 hours after grouting. Figure 3-27 illus-
trates the use of a cover to protect baseplate and foundation from both sun
and rain. If epoxy grouting is to be done in cold weather (below 45 OF).
baseplate and foundation must be shielded and heated.

Baseplate Preparation
Now that the baseplate leveling procedure has been discussed, the
baseplate requirements listed will be understood more clearly. These re-
quirements should be spelled out in the purchaser’s pump specification or
purchase order. Although pump manufacturers often provide these re-
quirements. it is best to negotiate and review them prior to placing an
order.
All welding on the baseplate shall be completed and stress relieved
(if required) prior to machining the pump and driver mounting sur-
faces.
All machined mounting surfaces shall be coplanar to 0.002 in.
All baseplate welds shall be continuous (no skip welding) and free of
cracks.
Underside of baseplate shall be sandblasted to white metal and
coated with 0.003-in. wet thickness of epoxy coating (not epoxy
paint) as specified by purchaser.
All cross bracing on the underside of the baseplate shall have a 2.0
in. x 6.0-in.-wide opening to allow for grout flow.
Vent holes (0.5-in. diameter) shall be provided for each bulkhead
compartment at all corners, high points, and perimeter edges of
bulkhead. Perimeter vent holes in baseplate shall be on 18-in. centers
minimum. Any angle iron or “C” channels added for stiffeners will
require vent holes on both sides.
Radius all sharp corners on baseplate flanges, minimum I .O-in. ra-
dius.
Provide Vx in. minimum shim adjustment under driver feet for mc-
chanical alignment.
Provide eight alignment positioning screws for the driver.
Machined mounting surfaces shall extend I .O in. beyond pump and
driver mounting feet on all sides.
Drill and tap two holes on the baseplate flanges, one on each side of
the anchor bolt holes. for V2-in. diameter (minimum) jack/leveling
screws.