Page 29 - GRINNELL Mechanical Grooved Piping Products EMEA

Grooved Couplings
GRINNELL Coupling Installation Information
Installation Handbook: IH-1000M
WARNING
Failure to follow these instructions may result in improper product installation, joint failure or leakage, serious personal injury, and/or property damage.
The following instructions should be used as a guideline for the proper installation of GRINNELL Grooved Products.
1. Always read and understand the instructions.
2. To avoid serious personal injury always wear appropriate
personal protective equipment (ppe), such as safety glasses,
hard hat and foot protection.
3. Never remove any piping component without verifying that
the system is de-pressurised and drained. Failure to due so
may result in serious personal injury.
4. Ensure that the supplied gasket is suitable for the intended
application. To prevent deterioration of the gasket material, a petroleum lubricant should never be used. Use a recommended lubricant to install the gasket.
5. The pipe groove dimensions must be in accordance with Standard Roll Groove or Cut Groove Specifications. Refer to Pages 117 to 121 or Tech Data Sheet G710 for additional information.
6. Ensure that the coupling keys are engaged in the grooves.
7. Always tighten nuts evenly by alternating sides. Uneven
tightening can cause the gasket to pinch or bind. If a gasket becomes pinched, replace it immediately.
These installation instructions do not take the place of nor
do they eliminate the need for the installer to fully read and understand the complete GRINNELL Products Installation Handbook (refer to IH-1000M). Always review the GRINNELL Products Installation Handbook and individual product tech data sheets for the latest instructions, techniques, and care and
ASME Standard Note
*Note: The samples that were tested contained the GRINNELL Figure 707 high pressure flexible couplings, and the GRINNELL Figure 260 end caps of the appropriate size. These were used
on the assembly to test system components as related in a field environment. The rated or working pressure of these items is 68.9 bar (1,000 psi).
*Note: The material of both the fittings and couplings used in this testing is found in the GRINNELL Handbook. This material is Ductile Iron Casting Grade 65-45-12, which has an elongation in 51mm (2”) of 12%.
8. Torque values are supplied as a guideline and may be used when setting the torque on power impact wrenches. Always refer to the power impact wrench manufacturer’s instructions for settings.
9. Exceeding the suggested torque values may cause damage to the coupling and/or result in pipe-joint failure. Minimum bolt torque is required for coupling to meet the published performance parameters.
10. Always inspect each joint to ensure that the coupling is properly installed.
EPDM, Tri-Seal gaskets are recommended for freezer applications. Reducing Couplings are not recommended for freezer applications. For dry pipe and freezer applications,
use the Tri-Seal freezer gasket with a petroleum-free silicone lubricant. Standard lube is not recommended for this application as it freezes and can cause leakage.
maintenance information. This document does not supersede or replace the GRINNELL Products Installation Handbook or individual product tech data sheets. Current documentation can be obtained by contacting your GRINNELL sales Representative or visiting www.grinnell.com.
The Component Proof Test in ASME A17.1 – 2004, section 3.19.1.3 requires testing to section 8.2.8.5, or five times the rated pressure.
The calculation of the factor of safety located in section 8.2.8.5 would then be calculated as F = (5.04 / 12 – 2.8) + 2.7. This then, according to section 8.2.8.5, would be a requirement safety factor of 3.25. The minimum pressure requirement of these components then would be 224.1 bar (3,250 psig).
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