Directive No.: D-GA 2012-03 Page 1 of 1
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DIRECTIVE
This Directive is being issued by a provincial safety manager pursuant to section 30 of the Safety Standards Act. Date of Issue: September 5, 2012 Directive No.: D-GA 2012-03 General Details This Directive is provided to clarify the requirements for installation of propane regulators in vapour service in order to ensure the regulators are not subjected to propane liquid. Specific Details Clause 4.5.2 in both the CAN/CSA B149.1-10 Natural Gas and Propane Installation Code and B149.2-10 Propane Storage and Handling Code states: The use of an appliance, an accessory, a component, equipment, or material shall be prohibited where a hazard is created. Remotely installed first-stage and integral two-stage propane vapour regulators can be subjected to liquid propane if they are installed below the liquid level of the supply container due to no-flow conditions and/or changes in ambient temperatures. Vapour service regulators are not designed to regulate propane liquid, and may be damaged by it, or may pass liquid leading to hazardous conditions downstream. These regulators must be installed above the maximum liquid level of the supply container(s), and have the supply connection oriented to allow for any liquid to drain back to the container. Second-stage regulators installed in areas of the Province where the ambient temperature may permit reliquification at the supplied intermediate pressure are to be installed in such a manner preventing the accumulation of liquid at the regulator’s inlet. Also refer to Clause 5.1.2 of the CAN/CSA B149.1-10: In a residential application using propane, propane vapour pressure in either a piping or tubing system between the first-stage and second-stage regulator shall not be higher than 10 psig (70 kPa). In other applications using propane, means shall be provided to prevent liquefaction of propane. Eric Skehor Provincial Safety Manager – Gas References: SBC 2003 Chapter 39 Safety Standards Act B.C. Reg. 150/2011, August 12, 2011 Gas Safety Regulation B.C. Reg. 134/2009, April 1, 2009 Safety Standards General Regulation CAN/CSA B149.1 Natural Gas and Propane Installation Code CAN/CSA B149.2 Propane Storage and Handling Code
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Propane Regulator Installation
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