2.2.7.7
Nuts and Bolts
Bolts used in assembling pump and its supporting members, including anchor
bolts and dowels, shall be of 300 series stainless steel. Use only bronze
nuts and hexagonal bolts and nuts. Washers used shall be 300 series of
stainless steel.
2.2.7.8
Galvanic Protection
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NOTE: Select appropriate alternate paragraph.
Alternate 1 should be used for pumps having
discharge diameters of 500 mm (20 in.) or less.
Alternate 2 should be used for pumps having a
discharge diameter greater than 20 in.. This may
also be used for pumps with sidecharge diameters of
500 mm (20 in.) or less when manufacturers
information indicates that this method will be the
least expensive. The total weight of anodes to be
used for each pump is:
SIZE
MINIMUM
TOTAL
DISCHARGE
NUMBER
WEIGHT OF
DIAMETER
OF ANODES
ANODES USED
mm (in.)
USED
kg (lbs)
From 500 (20) to
2
18 (40)
and including
900 (36)
From 900 (36) to
4
36 (80)
and including
1200 (48)
From 1200 (48) to
7
68 (150)
and including
2100 (84)
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[When dissimilar metals are used, dissimilar parts shall be electrically
isolated. Verify isolation by checking joint with an ohmmeter.]
[When dissimilar metals are used, use zinc anodes. Provide machined
mounting pads and install anodes on carbon steel or cast iron parts.
Fasten anodes to bare material on pump so that continuity is obtained
between anode and pump. Verify continuity by checking joint with an
ohmmeter. Locate anodes on exterior of pump below normal sump level.
Total weight of anodes used per pump shall be [18][36][68] kg [40][80][150]
pounds. Pump joints shall be electrically bonded at the joints.]
2.2.7.9
Harnessed Coupling
NOTE: This alternative is used when the flexible
coupling is to be furnished by the pump Contractor.
The applicable connection should be stated.
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SECTION 15131A
Page 29
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