Page 150 - GRINNELL Mechanical Grooved Piping Products EMEA

Grooved Couplings
Pressure and Design Data
Typical Specifications
Building Service Systems - Cooling
Cooling System Specifications
(CSI - Div. 15 Section 15-N Refrigeration Systems)
Section 1 - Chilled Water - Supply & Return
GRINNELL Mechanical Grooved Pipe couplings, fittings and butterfly and check valves as manufactured or supplied by GRINNELL Mechanical Products shall be used for cooling system chilled water piping, including risers, mains, equipment connection, branches, supply and return lines under operating conditions not
to exceed -34°C to 110°C (-30°F to 230°F) temperature. Calculations shall be made based on coupling manufacturers latest literature to determine expansion/ contraction allowance available, enabling elimination of special movement compensators, swing joints, flexible connections and vibration isolators where possible.
1.1 Materials:
1.1.1 Pipe - Shall be steel pipe, conforming to ASTM A-135, A-795 or A-53. All pipe shall be prepared according to GRINNELL published specifications, or to ANSI/AWWA C-606 grooved end pipe. Pipe ends shall be prepared as detailed in Basic Materials and Methods.
1.1.2 Couplings - All flexible couplings shall be GRINNELL Figure 705 and 707 with Grade “E” EPDM gaskets and zinc plated bolts and nuts. All rigid couplings shall be GRINNELL Figure 772 with Grade “E” EPDM gaskets and zinc plated bolts and nuts.
1.1.3 Branch Connections - Branch stub- in connections shall be made with Figure 730 with Grade “E” EPDM gaskets and zinc plated bolts and nuts.
1.1.4 Flange Connections - Shall be GRINNELL Figure 71 Flange incorporating Grade “E” EPDM gasket.
1.1.5 Fittings - Shall be GRINNELL ductile iron or segmentally welded steel fittings, with grooved ends.
1.1.6 Butterfly Valves - Shall be
of grooved end design with EPDM encapsulated disc. Neck design shall readily accommodate insulation. Valves shall have pressure assisted double seal and stainless steel upper stems, and be capable of 20.7 Bar (300 psi), bubble-tight-shut-off, with an actuator or hand lever.
1.1.7 Check Valves - Shall be of grooved end design with a clapper seal of EPDM. The valves shall have a spring loaded clapper to ensure a leak tight seal and a non-sticking operation. The clapper seat in the valve body shall be nickel. Valves shall be capable of pressures of 20.7 Bar (300 psi).
Section 2 - Cooling Tower Piping
Same as Section 1, except pipe, couplings and fittings shall be galvanised.
Section 3 - Dual Temperature Systems Piping
Same as Section 1.
Section 4 - Condenser Water Piping
Same as Section 1.
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