2.1.10.3
Pressure/Temperature Test Ports
Pressure/Temperature Test Ports shall have brass body and EPDM and/or
Neoprene valve seals. Ports shall be rated for service between 2 and 135
degrees C 35 and 275 degrees F and up to 3447 kPa (gage) 500 psig. Ports
shall be provided in lengths appropriate for the insulation thickness
specified in Section 15080 THERMAL INSULATION FOR MECHANICAL SYSTEMS and
installed to allow a minimum of 305 mm 12 inches of access for probe
insertion. Provide with screw-on cap attached with a strap or chain to
prevent loss when removed. Ports shall be 8 mm DN 1/4 inch NPT and accept
3 mm 1/8 inch diameter probes.
2.1.11
Miscellaneous Pipeline Components
2.1.11.1
Air Vent
Provide float type air vent in hydronic systems. Vent shall be constructed
of brass or semi-steel body, copper float, and stainless steel valve and
valve seat. Design air vent to suit system operating temperature and
pressure. Provide isolating valve to permit service without draining the
system. Pipe discharge of vent to a drain.
2.1.11.2
Strainers
Strainers for classes 125 and 250 piping in IPS 15 to 200 mm 1/2 to 8 inches,
inclusive, FS WW-S-2739 and locate as indicated.
2.1.11.3
Hangers and Supports
Design and fabrication of pipe hangers, supports, and welding attachments
shall conform to MSS SP-58 and ASME B31.9. Hanger types and supports for
bare and covered pipe shall conform to MSS SP-69 for the temperature range.
2.1.11.4
Pipe Sleeves
Sleeves in masonry and concrete walls, floors, and roof slabs shall be ASTM
A 53/A 53M, Schedule 40 or Standard Weight, hot-dip galvanized steel
[ductile-iron or cast-iron] pipe. Sleeves in partitions shall be
zinc-coated sheet steel having a nominal weight of not less than 4.40
kilogram per square meter 0.906 pound per square foot.
2.1.11.5
Escutcheon Plates
Provide one piece or split hinge metal plates for piping passing through
floors, walls, and ceilings in exposed spaces. Provide polished stainless
steel plates or chromium-plated finish on copper alloy plates in finished
spaces and paint finish on metal plates in unfinished spaces.
2.2
CENTRAL MECHANICAL EQUIPMENT
[2.2.1
Boilers
UNDER 800,000 BTU/HR OUTPUT][Section 15515N LOW PRESSURE WATER HEATING
BOILERS OVER 800,000 BTU/HR OUTPUT].
][2.2.2
Hot Water Heat Exchangers
Provide as specified in Section 15184N HIGH MEDIUM TEMPERATURE WATER SYSTEM
SECTION 15185N
Page 20
Previous Page
