Page 151 - GRINNELL Mechanical Grooved Piping Products EMEA

Pressure and Design Data
Typical Specifications
Building Service Systems - Heating
Heating System Specifications
(CSI - Div. 15 Section 15-L Water Piping)
Section 1 - Hot Water Heating Systems - 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 hot water systems , including boiler manifolds, mains, risers, branches, supply and return lines, under operating conditions not to exceed 110°C (230°F). Calculations shall be based on coupling manufacturers latest literature to determine expansion allowance available, enabling elimination of special expansion 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.
All reducing couplings shall be GRINNELL Figure 716 with Grade “E” EPDM gaskets and zinc plated bolts and nuts.
1.1.3 Branch Connections - Branch stub-in connections shall be made with GRINNELL Figure 730 with Grade “E” EPDM gaskets and zinc plated bolts and nuts.
1.1.4 Flange Connections - Flange connections shall be GRINNELL Figure 71 Flange incorporating Grade “E”
EPDM gasket.
1.1.5 Fittings - 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 nonsticking operation. Valves shall be capable of pressures of 20.7 Bar (300 psi).
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