2.2.10
Pressure Gauges
Gauge sizes and scale ranges shall be as shown or scheduled on the Contract
Drawings. Gauges shall comply with ASME B40.100 Type 2A, as a minimum.
Compound gauges shall be provided on the suction side of pumps and standard
pressure gauge on the discharge side of pumps. Gauges shall have clear
acrylic or shatterproof glass windows and shock-resistant cases. The
design operations should be at the midpoint of the graduated scale. Major
divisions shall be equally spaced and shall be in whole integers. Scale
units shall be engraved on the scale face. Pointer travel shall not be
less than 200 degrees nor more than 270 degrees arc. Gauge accuracy shall
be plus or minus 0.5 percent of span. Each gauge, except those for
hydraulic systems, shall have a process shutoff valve.
2.2.11
Gauge Panel
A gauge panel shall be provided on which [1] [2] [_____] nominal pressure
gauges to sense unit inlet and outlet pressures and [1] [2] [_____]
pressure switch shall be mounted. The pressure sensor switch shall be
wired to a control panel which sounds an alarm when the differential
pressure exceeds the [maximum differential pressure specified in Paragraph
Design Criteria or Cartridge and Bag Design Criteria (as applicable)]
[maximum differential pressure specified by the manufacturer].
2.2.12
Tank Requirements
**************************************************************************
NOTE: Further requirements for tanks specific to
each filtration process are presented in the
applicable paragraph.
**************************************************************************
2.2.12.1
General
Tanks specified shall be provided in accordance with the following general
requirements, unless otherwise indicated. Each tank shall include flanged
fittings for inlet, outlet, overflow and drain. The size, elevation and
orientation shall be provided in accordance with construction drawings.
Hold down lugs shall be provided to anchor the tank to the base.
2.2.12.2
**************************************************************************
NOTE: Tank construction materials must be
compatible with the materials to be handled. This
requirement is applicable for all tanks (e.g.,
filter tanks, backwash tanks, chemical feed, polymer
supply, etc.).
**************************************************************************
The tank construction material shall be compatible with the material to be
handled. Tanks constructed of polyethylene, polypropylene, and fiberglass
reinforced plastic (FRP) shall conform to applicable material and
construction provisions of ASTM C 582, ASTM D 3299, and ASTM D 4097. Tanks
constructed of steel shall conform with applicable material and
construction provisions of AWWA D100. Carbon steel tanks shall be
fabricated with ASTM A 283/A 283M carbon steel Grade C or D and protected
with [an appropriate interior coating system for the intended service]
[vinyl ester epoxy] [_____] in accordance with applicable requirements in
SECTION 11393
Page 20
Previous Page
