2015 CSA B149.1, Natural Gas and Propane Installation Code Top 12 changes

2010 Code – No reference; no exclusion 2015 Code – Provides for the use of press-connect metallic fittings Description: The revisions to clauses 6.2.2.b, 6.9.1, 6.9.9, plus 6.15.2 and 6.15.3 (underground piping and tubing systems) recognize the use of press-connect metallic fittings. ANSI LC 4CSA 6.32, Press-connect metallic fittings for use in fuel gas distribution systems, was revised to include other metallic materials (copper, carbon steel and stainless steel). This change clarifies the acceptable use of press-connect metallic fittings.

2010 Code – 7.19, Direct-fired door heaters; 7.20, Direct-fired make-up air heaters (DFMAH); 7.21 Non-recirculating direct gas-fired industrial air heaters (DFIAH) 2015 Code – “Notes” were added to identify the withdrawn standards previously used to certify these products. Description: The standard for direct-fired door heaters, CGA 3.12 (CAN1-3.12) and the standard for direct-fired make-up air heaters, CGA 3.7 (CAN1-3.7) were both withdrawn. The products covered under 7.19, Direct-fired door heaters, and 7.20, Direct-fired make-up air heaters (DFMAH) are legacy products that are no longer being manufactured. There is a market for used heaters, which if well maintained, are functional. These products are installed for use in renovations and new projects.

2010 Code – Common venting not permitted 2015 Code – Common venting permitted meeting criteria for positive pressure venting Description: Revision to clauses 8.10.6, 8.14.13 and 8.20 to provide requirements for common venting of appliances with positive pressure venting. Check valve technology (flue backflow preventer) has been developed to help prevent backflow issues with flue products. New definition added for “flue backflow preventer”- a system or device used in common venting of positive pressure appliances to prevent the exhaust flue from active appliances sharing the system from flowing back into the vent of dormant or idling appliance(s).

1) Recognizes the use of press-connect metallic fittings

2) Reference to withdrawn standards previously used to certify direct-fired door heaters and direct-fired make-up air heaters

3) Check valve technology to prevent flue products backflow issues for common venting of appliances with positive pressure venting.

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2015 CSA B149.1, Natural Gas and Propane Installation Code Top 12 changes

2010 Code – General requirements 2015 Code – Specifications for connecting an appliance to the gas piping system Description: Revisions to clause 6.11 clarify how an appliance is to be connected to the gas piping system; addresses the use of corrugated stainless steel tubing (CSST) systems and tubing system installations, and recognizes the use of gas convenience outlets.

2010 Code – No requirements 2015 Code – Added new clauses 4.25 and 6.27

Description: New clauses 4.25, Mobile homes and recreational vehicles, and 6.27, Highway vehicles, recreational vehicles, outdoor food service units, and wash-mobiles, were transferred from the B149.2 Code to provide a single source for appliance and gas system installations regardless of installed location.

2010 Code – No information 2015 Code – Includes requirements for natural gas Description: Natural gas was added to clause 2.24. The B149.1 Code does not address odorization of natural gas, but contains references for the odorization of propane. There are farms and industrial natural gas systems throughout Canada that have a private natural gas supply and as a safety precaution the odorization of the gas will provide a way to detect leaks. The B149.1 Code references CSA Z662 to cover the odorization requirements where natural gas is used for fuel purposes.

2010 Code – No clauses 2015 Code – Regulator materials and mounting to protect against weather conditions Description: Clauses 5.2.2.5 and 5.2.2.6 were originally in the B149.2 Code and were transferred to the B149.1 Code to consolidate the information.

4) Use of corrugated stainless steel tubing (CSST) systems and tubing system installations, and recognizes the use of gas convenience outlets.

5) New clauses for mobile homes, recreational vehicles, highway vehicles, outdoor food service units, and wash-mobiles

6) Odorization of natural gas

7) Pressure regulators for propane vehicle usage

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2015 CSA B149.1, Natural Gas and Propane Installation Code Top 12 changes

2010 Code – No coverage 2015 Code – New clause 6.16.6, Galvanic corrosion added Description: Clause 6.16.6 added specifications to prohibit metallic piping or tubing from coming into contact with a dissimilar metal. Metallic gas pipe coming into contact with a pipe of a different material (i.e. copper water pipe) can result in galvanic corrosion. Avoiding contact should be specifically stated. Clause 6.8.3 already prohibits support via another pipe, and clause 6.8.9 specifies that metallic pipe supports must be installed to avoid galvanic corrosion.

2010 Code – Term used was “waterproof wrap” 2015 Code – Revised term to “pipe wrap tape” Description: Included a definition for “pipe wrap tape” and updated 6.16.7 and 6.16.8. Field inspections continue to find unacceptable pipe wraps such as duct tape and thin, low quality electrical tape being used in the applications addressed under 6.16.7 and 6.16.8. The use of “pipe wrap tape” was added to explain what is considered to be an acceptable wrap.

2010 Code – No reference 2015 Code – Added reference to Z21.101CSA 8.5 Description: Reference to Z21.101CSA 8.5 was added to the definition for Gas Connector, 6.11.2-d, 6.21.1, 6.21.4 and 6.21.5. In 2012, ANSI Z21.101CSA 8.5, Gas hose connectors for portable and moveable appliances, was introduced to industry. This standard facilitates the introduction of flexible connectors that are designed to withstand repeated connecting and disconnecting and allows repositioning of connected appliances. These appliances could be continually moved and repositioned and simply plugged in to a gas convenience outlet anywhere in a building, similar to the way electrical appliances can be moved and plugged in to any electrical outlet. This also provides an opportunity for improving the connection methods for appliances that are not typically fixed in place and may be periodically moved for cleaning or maintenance, such as ranges, clothes dryers, and refrigerators.

8) Galvanic corrosion

9) Revised term from “waterproof wrap” to “pipe wrap tape”

10) Reference to Z21.101CSA 8.5 added

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2015 CSA B149.1, Natural Gas and Propane Installation Code Top 12 changes

2010 Code – No reference 2015 Code – Added to 7.2.4.3 Description: The second safety shut-off valve required under 7.2.4.3 may be upstream of the regulator due to the pressure drop across two safety shut-off valves in a gas line running at low pressure.

2010 Code – No clause 2015 Code – Added Direct gas-fired process air heaters Description: ANSI Z83.25CSA 3.19 became effective in Canada on December 1st, 2009. Not all jurisdictions are aware of its coverage and are not allowing use of ANSI Z83.4/CSA 3.7 in applications such as a paint booth heater. The inclusion of clause 7.22 provides installation instructions for Direct Gas-Fired Process Air Heaters. Instructions for a paint booth heater were under clause 7.20.4; however, the appliances described in 7.20 have not been manufactured since 2002.

11) Safety shut-off valve upstream of the regulator

12) 7.22, Direct Gas-Fired Process Air Heaters (DFPAH)

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