Grinnell catalogue - Grinnell - #5

General,The Grinnell Coupling

Grinnell Grooved Products are designed for use within grooved end pipe systems and are available in nominal sizes of 25mm (1") to 600mm (24") depending on the coupling figure required.The Grinnell Coupling design provides several economic advantages when compared to welded or flanged systems. They also provide a universal means for the connection of pipe, fittings and pipe system components.

Grinnell Couplings and Gaskets permit the selection of suitable combinations for specific application. Field modifications are easily accommodated with Grinnell Grooved Couplings as the couplings can be easily rotated, eliminated and/or added to facilitate the necessary modification.

* Flexible Couplings act as an "expansion joint", allowing linear and angular movement of the pipe. They are designed with the coupling keys engaging the pipe without gripping on the bottom of the grooves, while still providing for a restrained mechanical joint. This is particularly useful to allow for pipe expansion or contraction and piping misalignment.

* Rigid Couplings provide rigid gripping of the pipe. They are designed to bring the pipe ends together and the coupling clamps firmly onto the pipe OD and also onto the bottom of the grooves. Because Rigid Couplings clamp around the entire pipe surface, they provide resistance to flexural loads and therefore permit longer spacing to ASME/ANSI B31.1 (Power Piping) and ASME/ANSI B39.1 (Building Services) requirements as well as NFPA 13 (Sprinkler Systems).

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Coupling bolts and nuts are heat treated carbon steel, oval-neck track head bolts and heavy hex nuts, conforming to ASTM A-183 minimum tensile strength of 110,000 psi. Bolts and nuts are Zinc electroplated. The oval neck design prevents turning off the bolt while tighte­ning the hex nut with a single wrench. The metric bolts and nuts are made out of zinc electroplated carbon steel.

Grade "E" EPDM with green color code identification conforms to ASTM D-2000 for service temperature from -34°C (-30° F) to 110°C (230° F).They are recommended for hot water not to exceed 110°C (230° F), plus a variety of dilute acids, oil free air and many chemical services. They are not recommended for petro­leum services.

For dry pipe and freezer systems aTri-Seal Grade "E" Gaskets with rigid couplings is recommended.

Details for special gaskets, grade "T" Nitrile, grade "EN" EPDM (for potable water services), grade "O" Fluoro Elastomer and grade "L" Silicone, see chapter 7.

All housings are standard coated with a lead-free water based enamel paint, colour red. Hot dipped zinc galvanized, epoxy or other coatings are optional. For detailed information contact Tyco.

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C-shape rubber gasket naturally seals on pipe ends.

The housings compress the gasket

to increase the sealing capacity.

The system pressure or vacuum will then maximize the leak-tight seal.