2.10
DUCTWORK AND DUCT TRANSITIONS
All ductwork and duct transitions shall be stainless steel and shall be as
specified in Section 15895 AIR SUPPLY, DISTRIBUTION, VENTILATION, AND
EXHAUST SYSTEMS.
2.11
THERMAL INSULATION
Thermal insulation for ductwork and equipment shall be as specified in
Section 15080 THERMAL INSULATION FOR MECHANICAL SYSTEMS.
2.12
PRESSURE GAUGE
Pressure gauges shall be dial type, diaphragm operated, with two pressure
relay switches for low and high limit relay control. The gauges shall
incorporate adjustable switch point indicators for continuous indication of
switch settings. Gauges shall be provided for roughing filter, pre-filter,
HEPA filter banks, post filter, and total filter system pressure drop.
Gauges shall be at least 98 mm 3-7/8 inches in diameter and shall have
white dials with black figures with graduations. Gauges shall have a
minimum range of 250 pascals 1 inch wg beyond the specified final
resistance for the individual filter served. Each gauge shall incorporate
a screw operated zero adjustment and shall be furnished complete with
stainless steel compression fittings and tubing. All hardware shall be
mounted in one location and tested at the factory. All gauges shall have a
dual dial scale readout in units of pascals and inches water gauge.
2.13
PRESSURE PORTS
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NOTE: Pressure ports are not needed for carbon
adsorber elements.
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Static pressure ports shall be located on the filtration unit upstream and
downstream of each roughing filter, pre-filter, HEPA filter bank, and
post filter. The port connections shall be 6.35 mm 1/4 inch 300 series
stainless steel pipe nipples and caps.
PART 3
EXECUTION
3.1
INSTALLATION AND ERECTION
CBR Air filtration systems shall be installed and erected in accordance
with ASME N509, as indicated on the drawings, and in accordance with the
manufacturer's diagrams and recommendations.
3.2
WELDING
Welding procedures, welders, and welding operators shall be qualified in
accordance with ASME BPVC SEC IX. All welding performed shall meet the
requirements specified in ASME BPVC SEC IX and as required by ASME N509.
Pressure retaining weld joints shall comply with the requirements of ASME
BPVC SEC IX.
3.3
FACTORY NUCLEAR QUALITY ASSURANCE PROGRAM
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SECTION 15860A
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