Natural gas and propane installation code B

Transcription

1 Natural gas and propane installation code B

2 Legal Notice for Standards Canadian Standards Association (CSA) standards are developed through a consensus standards development process approved by the Standards Council of Canada. This process brings together volunteers representing varied viewpoints and interests to achieve consensus and develop a standard. Although CSA administers the process and establishes rules to promote fairness in achieving consensus, it does not independently test, evaluate, or verify the content of standards. Disclaimer and exclusion of liability This document is provided without any representations, warranties, or conditions of any kind, express or implied, including, without limitation, implied warranties or conditions concerning this document s fitness for a particular purpose or use, its merchantability, or its non-infringement of any third party s intellectual property rights. CSA does not warrant the accuracy, completeness, or currency of any of the information published in this document. CSA makes no representations or warranties regarding this document s compliance with any applicable statute, rule, or regulation. IN NO EVENT SHALL CSA, ITS VOLUNTEERS, MEMBERS, SUBSIDIARIES, OR AFFILIATED COMPANIES, OR THEIR EMPLOYEES, DIRECTORS, OR OFFICERS, BE LIABLE FOR ANY DIRECT, INDIRECT, OR INCIDENTAL DAMAGES, INJURY, LOSS, COSTS, OR EXPENSES, HOWSOEVER CAUSED, INCLUDING BUT NOT LIMITED TO SPECIAL OR CONSEQUENTIAL DAMAGES, LOST REVENUE, BUSINESS INTERRUPTION, LOST OR DAMAGED DATA, OR ANY OTHER COMMERCIAL OR ECONOMIC LOSS, WHETHER BASED IN CONTRACT, TORT (INCLUDING NEGLIGENCE), OR ANY OTHER THEORY OF LIABILITY, ARISING OUT OF OR RESULTING FROM ACCESS TO OR POSSESSION OR USE OF THIS DOCUMENT, EVEN IF CSA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES, INJURY, LOSS, COSTS, OR EXPENSES. In publishing and making this document available, CSA is not undertaking to render professional or other services for or on behalf of any person or entity or to perform any duty owed by any person or entity to another person or entity. The information in this document is directed to those who have the appropriate degree of experience to use and apply its contents, and CSA accepts no responsibility whatsoever arising in any way from any and all use of or reliance on the information contained in this document. CSA is a private not-for-profit company that publishes voluntary standards and related documents. CSA has no power, nor does it undertake, to enforce compliance with the contents of the standards or other documents it publishes. Intellectual property rights and ownership As between CSA and the users of this document (whether it be in printed or electronic form), CSA is the owner, or the authorized licensee, of all works contained herein that are protected by copyright, all trade-marks (except as otherwise noted to the contrary), and all inventions and trade secrets that may be contained in this document, whether or not such inventions and trade secrets are protected by patents and applications for patents. Without limitation, the unauthorized use, modification, copying, or disclosure of this document may violate laws that protect CSA s and/or others intellectual property and may give rise to a right in CSA and/or others to seek legal redress for such use, modification, copying, or disclosure. To the extent permitted by licence or by law, CSA reserves all intellectual property rights in this document. Patent rights Attention is drawn to the possibility that some of the elements of this standard may be the subject of patent rights. CSA shall not be held responsible for identifying any or all such patent rights. Users of this standard are expressly advised that determination of the validity of any such patent rights is entirely their own responsibility. Authorized use of this document This document is being provided by CSA for informational and non-commercial use only. The user of this document is authorized to do only the following: If this document is in electronic form: load this document onto a computer for the sole purpose of reviewing it; search and browse this document; and. print this document if it is in PDF format. Limited copies of this document in print or paper form may be distributed only to persons who are authorized by CSA to have such copies, and only if this Legal Notice appears on each such copy. In addition, users may not and may not permit others to alter this document in any way or remove this Legal Notice from the attached standard; sell this document without authorization from CSA; or. make an electronic copy of this document. If you do not agree with any of the terms and conditions contained in this Legal Notice, you may not load or use this document or make any copies of the contents hereof, and if you do make such copies, you are required to destroy them immediately. Use of this document constitutes your acceptance of the terms and conditions of this Legal Notice.

3 CSA Standards Update Service B January 2010 Title: Natural gas and propane installation code Pagination: 288 pages (xiv preliminary and 274 text), each dated January 2010 To register for notification about any updates to this publication go to click on Services under MY ACCOUNT click on CSA Standards Update Service The List ID that you will need to register for updates to this publication is If you require assistance, please or call Visit CSA s policy on privacy at to find out how we protect your personal information.

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5 CSA Standard B Natural gas and propane installation code Published in January 2010 by Canadian Standards Association A not-for-profit private sector organization 5060 Spectrum Way, Suite 100, Mississauga, Ontario, Canada L4W 5N Visit our Online Store at

6 100% The Canadian Standards Association (CSA) prints its publications on Rolland Enviro100, which contains 100% recycled post-consumer fibre, is EcoLogo and Processed Chlorine Free certified, and was manufactured using biogas energy. To purchase CSA Standards and related publications, visit CSA s Online Store at or call toll-free or ISBN Technical Editor: Tony Cautillo Canadian Standards Association 2010 All rights reserved. No part of this publication may be reproduced in any form whatsoever without the prior permission of the publisher.

7 Canadian Standards Association Natural gas and propane installation code Contents CSA B149 Installation Code Committee vii Interprovincial Gas Advisory Council (IGAC) xi Preface xiii 1 Scope 1 2 Reference publications 2 3 Definitions 5 4 General Application Approval of appliances, accessories, components, equipment, and material Responsibilities of the installer Training and quality of labour Suitability of use Meter and service regulator installations Electrical connections and components Mobile homes Hazardous locations Smoking Isolation of safety devices Leak detection Appliance clearances to combustible material Accessibility Outdoor installations Appliances in garages Appliance ductwork connections Combined heating systems Appliances protected by automatic fire-extinguishing systems Control of appliances with self-energized pilots Defective heat exchangers High-altitude installations Protection of appliances from physical damage Odorization of propane 28 5 Pressure controls Gas system pressure Pressure regulators General Additional requirements for pressure regulators for propane applications Additional requirements for pressure regulators for natural gas applications Relief devices Hydrostatic relief devices for propane applications Venting of pressure control devices Appliance and pilot pressure regulators Appliance and pilot pressure regulators in propane applications Appliance and pilot pressure regulators in natural gas applications 34 January 2010 iii

8 B Canadian Standards Association 6 Piping and tubing systems, gas hose, and fittings General Material Size Volume of gas to be used for sizing piping and tubing systems Allowable pressure and pressure drop Extensions Location Piping practices Joints and connections Branch piping outlets Appliance connections Piping outlets Drip and dirt pockets Prohibited practices Underground piping and tubing Protection of piping and tubing Identification of piping or tubing Manual shut-off valves Manual-reset valves Gas hose and fittings Gas connectors Testing of piping, tubing, hose, and fittings Purging of piping and tubing systems and hose after leak testing Purging gas from a piping or tubing system Rooftop gas piping and tubing Inspection 53 7 Installation of specific types of appliances Boilers Generators, compressors/pressure boosters, stationary engines, and turbines General requirements Compressors/pressure boosters Emergency use generators Stationary gas engines and turbines Stationary gas engines and turbines in buildings Carbon dioxide generators Commercial-type clothes dryers Domestic-type clothes dryers Conversions Conversion burners Conversion of warm air furnaces Conversion of ranges Counter appliances Direct-vent appliances Furnaces used with cooling units Central furnaces Downflow furnaces Duct furnaces Horizontal furnaces Wall furnaces (recessed heaters) Construction heaters and torches Direct-fired door air heaters Direct-fired make-up air heaters (DFMAH) 67 iv January 2010

9 Canadian Standards Association Natural gas and propane installation code 7.21 Non-recirculating direct gas-fired industrial air heaters (DFIAH) Infrared heaters Room heaters Decorative appliances and gas logs Pool heaters Water heaters Unit heaters Hotplates Incinerators Lighting Commercial cooking appliances Residential-type ranges Refrigerators 77 8 Venting systems and air supply for appliances General Air-supply determination for central-heating furnaces, boilers, and hot-water heaters Air-supply openings and ducts Air-supply requirements for appliances having a total input exceeding Btuh (120 kw) Air-supply dampers, louvres, and grilles Conditions created by exhaust fans, air-supply fans, circulating fans, or fireplaces Engineered installations Air supply by mechanical means Appliance venting Methods of venting appliances Vent and chimney requirements Chimneys Vent and chimney sizing Vent and chimney termination Vent and chimney support Vents and chimneys serving two or more appliances Vents outside buildings Vent connectors Chimney connections Size and height of interconnected vent connectors Multi-storey venting Dampers and attachments Draft hoods Venting arrangements Draft regulators Automatic vent damper or automatic flue damper Manually operated flue dampers Installation of draft-control devices Induced- or forced-draft devices Venting of appliances into canopies Heat reclaimers Natural gas compressors and cylinders Installation of compressors Requirements for cylinders Cylinder filling and cylinders Cylinder storage Cylinders connected for use 104 January 2010 v

10 B Canadian Standards Association 10 Vehicle refuelling appliances (VRA) without storage (for natural gas only) Installation Pressure relief devices and other vents and vent lines Piping, tubing, and hose Testing of piping, hose, and fittings Installation of safety equipment, signs, and/or symbols Refuelling of vehicles 107 Annexes A (informative) Sizing and capacities of piping and tubing for natural gas 108 B (informative) Sizing and capacities of piping and tubing for propane 143 C (informative) Vent sizing tables for Category I natural gas and propane appliances 169 D (informative) Customer s meter and regulator installations 234 E (informative) Example of piping design sizing (imperial and metric) 236 F (informative) Suggested general dimensions for draft hoods 239 G (informative) Piping expansion and flexibility 243 H (normative) Purging of piping and tubing systems where a readily accessible burner is not available or where an appliance is not equipped with a continuous pilot 245 I (informative) General information 248 Index 257 Tables 4.1 Appliance clearance reductions with specified forms of protection Pressure inside buildings Clearance from discharge, ft (m) Maximum allowable pressure drop Spacing of supports for piping Pressure test requirements Combustion/dilution air requirements for appliances having draft-control devices when the combined input is up to and including Btuh (120 kw) and the structure complies with Clause 8.2.1(a) or (b) Combustion air requirements for appliances not having draft-control devices when the combined input is up to and including Btuh (120 kw) and the structure complies with Clause 8.2.1(a) or (b) Combustion/dilution air requirements for appliances having draft-control devices when the combined input is up to and including Btuh (120 kw) and the structure does not comply with Clause 8.2.1(a) or (b) Combustion air requirements for appliances not having draft-control devices when the combined input is up to and including Btuh (120 kw) and the structure does not comply with Clause 8.2.1(a) or (b) Type of venting system to be used Appliance vent connector clearances Vent connector clearance reductions with specified forms of protection 96 Figures 8.1 Vent passing through a pitched roof 91 vi January 2010

11 Canadian Standards Association Natural gas and propane installation code CSA B149 Installation Code Committee B. Diggens MJS Mechanical Ltd., Calgary, Alberta Chair J.M. Jones D.J. Stainrod J.M. Jones Consulting Services, Leamington, Ontario D.J. Stainrod & Associates Ltd. (PGAC), Bowmanville, Ontario Vice-Chair Vice-Chair J. Angus J.M.A. Associates, Midland, Ontario B. Bachellier Government of Nunavut, Cambridge Bay, Nunavut P. Baker Maxitrol Company, Hamilton, Ontario D. Baxter Enbridge Gas Distribution, Toronto, Ontario M. Binet Gaz Métro Inc., Montréal, Québec K. Carlisle Karl Dungs, Inc., Blaine, Minnesota, USA Associate P. Cavens Cavens & Associates, Roberts Creek, British Columbia R. Charbonneau Budget Propane Inc., Valleyfield, Québec S. Cooke Technical Standards & Safety Authority, Toronto, Ontario Alternate C. Côté Gaz Métro Inc., Montréal, Québec M. Davidson New Brunswick Department of Public Safety, Fredericton, New Brunswick W. Drover Government of Newfoundland and Labrador, St. John s, Newfoundland and Labrador Alternate A. Durnie Alberta Municipal Affairs, Edmonton, Alberta D. Eastman Government of Newfoundland and Labrador, St. John s, Newfoundland and Labrador January 2010 vii

12 B Canadian Standards Association G. Edgar Selkirk Inc., Logan, Ohio, USA D. Evans Bruce Sutherland Associates Ltd., Dartmouth, Nova Scotia Z. Fraczkowski Technical Standards & Safety Authority, Toronto, Ontario J. Good Autogas Propane Ltd., Burnaby, British Columbia A. Gould Reliance Comfort Ltd. Partnership, dba Reliance Home Comfort, Cambridge, Ontario D. Green National Research Council Canada, Ottawa, Ontario E. Hurd British Columbia Safety Authority, New Westminster, British Columbia Alternate J. Jachniak ENEFEN Energy Efficiency Engineering Ltd., Leduc, Alberta S. Katz S. Katz and Associates Inc., North Vancouver, British Columbia W.C. LaRose St. Albert, Alberta W. Lock British Columbia Safety Authority, New Westminster, British Columbia S. McCarthy CSA International, Cleveland, Ohio, USA Associate J. McCormack Superior Propane Inc., Moncton, New Brunswick R. McRae Government of the Northwest Territories Public Works and Services, Yellowknife, Northwest Territories J. Melling SaskPower, Saskatoon, Saskatchewan Alternate H. Nachaj Le Groupe Charbonneau Inc., Montréal, Québec V. Pao Manitoba Department of Labour and Immigration, Winnipeg, Manitoba Alternate R. Pattison ATCO Gas, Edmonton, Alberta viii January 2010

13 Canadian Standards Association Natural gas and propane installation code G. Potter Cambridge Engineering, Chesterfield, Missouri, USA G. Prociw Union Gas Limited, Chatham, Ontario V. Quiring Engineered Air, Division of Airtex Manufacturing Partnership, Calgary, Alberta B. Reid Prince Edward Island Department of Community Services & Attorney General, Charlottetown, Prince Edward Island J. Renaud Régie du bâtiment du Québec, Montréal, Québec D. Ricard Association Québécoise du Gaz Naturel, Montréal, Québec T. Rieger Manitoba Department of Labour and Immigration, Winnipeg, Manitoba J. Robertson Underwriters Laboratories of Canada, Victoria, British Columbia Associate C. Snow Enbridge Gas New Brunswick, Fredericton, New Brunswick D. Stewart Nova Scotia Department of Environment and Labour, Halifax, Nova Scotia M. Stornel Manitoba Hydro, Winnipeg, Manitoba S. Thenappan Rheem Manufacturing Company, Montgomery, Alabama, USA I. Tilgner Human Resources and Skills Development Canada, Ottawa, Ontario I. Turnbull Terasen Gas Inc., Surrey, British Columbia D. Weishuhn Blue Flame Heating & Air Conditioning Limited, Toronto, Ontario G. Williams SaskPower, Regina, Saskatchewan T. Windsor Sparling s Propane Co. Ltd., Flesherton, Ontario C. Wolfe Government of Nunavut Community & Government Services, Iqaluit, Nunavut Alternate January 2010 ix

14 B Canadian Standards Association D. Young Government of Yukon, Whitehorse, Yukon A. Cautillo Canadian Standards Association, Mississauga, Ontario Project Manager x January 2010

15 Canadian Standards Association Natural gas and propane installation code Interprovincial Gas Advisory Council (IGAC) S. Cooke Technical Standards & Safety Authority, Toronto, Ontario J. Renaud Régie du bâtiment du Québec, Montréal, Québec G. Williams SaskPower, Regina, Saskatchewan Chair Vice-Chair Vice-Chair B. Bachellier Government of Nunavut, Cambridge Bay, Nunavut M. Davidson New Brunswick Department of Public Safety, Fredericton, New Brunswick W. Drover Government of Newfoundland and Labrador, St. John s, Newfoundland and Labrador Alternate A. Durnie Alberta Municipal Affairs, Edmonton, Alberta D. Eastman Government of Newfoundland and Labrador, St. John s, Newfoundland and Labrador Z. Fraczkowski Technical Standards & Safety Authority, Toronto, Ontario E. Hurd British Columbia Safety Authority, New Westminster, British Columbia Alternate Alternate W. Lock British Columbia Safety Authority, New Westminster, British Columbia R. McRae Government of the Northwest Territories Public Works & Services, Yellowknife, Northwest Territories J. Melling SaskPower, Saskatoon, Saskatchewan V. Pao Manitoba Department of Labour and Immigration, Winnipeg, Manitoba Alternate Alternate B. Reid Prince Edward Island Department of Community Services and Attorney General, Charlottetown, Prince Edward Island T. Rieger Manitoba Department of Labour and Immigration, Winnipeg, Manitoba January 2010 xi

16 B Canadian Standards Association D. Stewart Nova Scotia Department of Environment and Labour, Halifax, Nova Scotia I. Tilgner Human Resources and Skills Development Canada, Ottawa, Ontario C. Wolfe Government of Nunavut Community & Government Services, Iqaluit, Nunavut Alternate D. Young Government of Yukon, Whitehorse, Yukon A. Cautillo Canadian Standards Association, Mississauga, Ontario Project Manager xii January 2010

17 Canadian Standards Association Natural gas and propane installation code Preface This is the fourteenth edition of CSA B149.1, Natural gas and propane installation code. It supersedes the previous editions, published in 2005 and 2000 by the Canadian Standards Association (CSA) as CAN/CSA-B149.1, in 1995, 1991, 1986, 1980, 1978, 1976, and 1974 by the Canadian Gas Association (CGA), and in 1971, 1966, 1962, and 1958 by the Canadian Standards Association. In 1958, the Canadian Standards Association published the first edition of CSA B149, Installation Code for Gas Burning Appliances and Equipment. It was superseded by later editions in 1962, 1966, and Following the publication of the 1966 edition, the decision was made to split the Code into two parts: B149.1, dealing with the installation of appliances and equipment burning natural gas, and B149.2, dealing with the installation of appliances and equipment burning propane. As a first step, B149.2 was prepared and first published in The Canadian Gas Association was accredited by the Standards Council of Canada as the standards development organization responsible for preparing standards for gas-burning appliances and equipment, and in this connection took over responsibility for the B149 Code in New editions of the Code were subsequently published in 1974, 1976, 1978, 1980, 1986, 1991, and On June 30, 1997, the Canadian Standards Association acquired International Approval Services (IAS), which was until then a joint venture of the American Gas Association (AGA) and the Canadian Gas Association. Under this agreement, CSA acquired the complete range of IAS standards administration, certification, and registration products and services for appliances and accessories fuelled by natural and liquefied petroleum gases. In 1998, the CSA B149 Installation Code Committee agreed to publish a Natural Gas and Propane Installation Code that would amalgamate the first seven sections of CAN/CGA-B149.1 and CAN/CGA-B149.2 to become CAN/CSA-B This amalgamation was in response to the trend among the authorities having jurisdiction of combining licensing and training for natural gas and propane. The remaining sections 8 to 14 of CAN/CGA-B149.2 became CAN/CSA-B , Propane Storage and Handling Code. In this 2010 edition, where a major change or addition to the previous edition of the Code has been made, the clause, table, or figure affected is identified by the symbol delta (Δ) in the margin. Users of the Code are advised that the change markers in the text are not intended to be all-inclusive and are provided as a convenience only; such markers cannot constitute a comprehensive guide to the revisions made to the Code. Care must therefore be taken not to rely on the change markers to determine the current requirements of the Code. As always, users of the Code must consider the entire Code and any local amendments. The CSA B149 Installation Code Committee, which is responsible for preparing this Code, consists of members of the provincial gas inspection authorities, natural gas utilities, propane distributors, appliance, equipment, and accessory manufacturers, certification organizations, and representatives from the Heating, Refrigeration and Air Conditioning Institute of Canada, the Mechanical Contractors association of Canada and federal government departments. This Code has been formally approved by the CSA B149 Installation Code Committee and by the Interprovincial Gas Advisory Council. January 2010 Notes: (1) Use of the singular does not exclude the plural (and vice versa) when the sense allows. (2) Although the intended primary application of this Code is stated in its Scope, it is important to note that it remains the responsibility of the users of the Code to judge its suitability for their particular purpose. (3) This publication was developed by consensus, which is defined by CSA Policy governing standardization Code of good practice for standardization as substantial agreement. Consensus implies much more than a simple majority, but not necessarily unanimity. It is consistent with this definition that a member may be included in the Technical Committee list and yet not be in full agreement with all clauses of this publication. (4) To submit a request for interpretation of CSA Standards, please send the following information to inquiries@csa.ca and include Request for interpretation in the subject line: (a) define the problem, making reference to the specific clause, and, where appropriate, include an illustrative sketch; January 2010 xiii

18 B Canadian Standards Association (b) provide an explanation of circumstances surrounding the actual field condition; and (c) where possible, phrase the request in such a way that a specific yes or no answer will address the issue. Committee interpretations are processed in accordance with the CSA Directives and guidelines governing standardization and are published in CSA s periodical Info Update, which is available on the CSA website at (5) CSA Standards are subject to periodic review, and suggestions for their improvement will be referred to the appropriate committee. To submit a proposal for change to CSA Standards, please send the following information to inquiries@csa.ca and include Proposal for change in the subject line: (a) Standard designation (number); (b) relevant clause, table, and/or figure number; (c) wording of the proposed change; and (d) rationale for the change. xiv January 2010

19 Canadian Standards Association Natural gas and propane installation code B Natural gas and propane installation code 1 Scope 1.1 This Code applies to the installation of (a) appliances, equipment, components, and accessories where gas is to be used for fuel purposes; (b) piping and tubing systems extending from the termination of the utility installation or from the distributor s propane tank; (c) vehicle-refuelling appliances and associated equipment meeting the requirements of a general-purpose appliance to fill a natural-gas-fuelled vehicle; and (d) stationary gas engines and turbines. Δ 1.2 This Code does not apply to (a) marine or pipeline terminals; (b) gas where used as a feedstock in petroleum refineries or chemical plants; (c) utility pipeline distribution and transmission pipelines; (d) storage and handling of liquefied natural gas or underground reservoirs for natural gas; (e) the installation of NGV fuel systems, containers, and refuelling stations; (f) the storage and utilization of compressed natural gas on boats; (g) the installation of vehicle-refuelling appliances when NGV storage containers are installed as part of the system; (h) refrigerated storage or underground reservoirs for propane; (i) propane used on boats; (j) propane used as a propellant in aerosol containers; (k) butane fuel cylinders of 150 g capacity or less; and (l) the installation of containers and equipment to be used for propane in distribution locations and filling plants and on tank trucks, tank trailers, and cargo liners. 1.3 Where the term gas is used, the requirements of this Code include, and apply equally to, any of the following gases or mixtures of them: natural gas, manufactured gas, or mixtures of propane gas and air, propane, propylene, butanes (normal butane or isobutane), and butylenes. 1.4 This Code and any Standards referenced in it do not make or imply any assurance or guarantee with respect to the life expectancy, durability, or operating performance of equipment and materials referenced in the Code. 1.5 The values given in yard/pound units are the standard. This Code contains SI (metric) equivalents to yard/pound units so that the Code can be used in SI (metric) units. SI (metric) equivalents may be approximate. January

20 B Canadian Standards Association 1.6 In this Code, unless approved otherwise by the authority having jurisdiction, shall indicates a mandatory requirement; should indicates a recommendation or that which is advised but not mandatory; and may indicates an advisory or optional statement. Notes to the text do not include mandatory or alternative requirements. The purpose of a note is to separate from the text explanatory or informative material that is not properly a part of this Code. Notes to figures and tables, however, are considered part of the figure or table and may be written as mandatory requirements. Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application. 2 Reference publications This Code refers to the following publications, and where such reference is made, it shall be to the edition listed below, including all amendments published thereto. CSA (Canadian Standards Association) Note: CGA Standards, Recommended Practices, and Codes are now published by CSA. ANSI Z /CSA Connectors for gas appliances ANSI Z /CSA Vented gas fireplaces ANSI Z /CSA Connectors for movable gas appliances ANSI Z /CSA Connectors for outdoor gas appliances and manufactured homes ANSI Z /CSA (R2008) Line pressure regulators ANSI Z /CSA (R2005) Gas convenience outlets and optional enclosures ANSI Z /CSA (R2009) Non-recirculating direct gas-fired industrial air heaters ANSI Z /CSA Gas food service equipment ANSI/LC /CSA Fuel gas piping systems using corrugated stainless steel tubing (CSST) CGA 2.17-M91 (R2009) Gas-fired appliances for use at high altitudes CAN1-6.2-M81 (R2006) Draft hoods (R2008) Service regulators for natural gas 2 January 2010

21 Canadian Standards Association Natural gas and propane installation code CAN/CGA-8.1-M86 (R2005) Elastomeric composite hose and hose couplings for conducting propane and natural gas CAN (R2006) Thermoplastic hose and hose couplings for conducting propane and natural gas (R2009) Vehicle refuelling appliances CGA Certification Laboratory Requirement LAB (revised 1994) Flexible gas tubing for interior natural and propane gas piping systems B51-09 Boiler, pressure vessel, and pressure piping code CAN/CSA-B (R2006) Natural gas fuelling stations installation code B137 Series-09, Thermoplastic pressure piping compendium: B Polyethylene (PE) piping systems for gas services B Electrofusion-type polyethylene (PE) fittings for gas services B Propane storage and handling code B Code for the field approval of fuel-related components on appliances and equipment CAN/CSA-B (R2006) Installation code for solid-fuel-burning appliances and equipment C Canadian Electrical Code, Part I CAN/CSA-W Safety in welding, cutting, and allied processes Z240 MH Series-09, Manufactured homes: Z Installation requirements for gas-burning appliances in manufactured homes Z Oil and gas pipeline systems ANSI/ASME (American National Standards Institute/The American Society for Mechanical Engineers) B (R2006) Pipe Threads, General Purpose (Inch) January

22 B Canadian Standards Association B Malleable Iron Threaded Fittings: Classes 150 and 300 B36.10M-2004 Welded and Seamless Wrought Steel Pipe ASTM (American Society for Testing and Materials) A 53/A 53M-07 Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless A 106/A 106M-08 Standard Specification for Seamless Carbon Steel Pipe for High-Temperature Service A 179/A 179M-90a (2005) Standard Specification for Seamless Cold-Drawn Low-Carbon Steel Heat-Exchanger and Condenser Tubes B Standard Specification for Seamless Copper Water Tube B Standard Specification for Seamless Copper Tube for Natural Gas and Liquefied Petroleum (LP) Gas Fuel Distribution Systems CGSB (Canadian General Standards Board) CAN/CGSB (withdrawn) Liquefied Petroleum Gas (Butanes) CAN/CGSB Liquefied Petroleum Gas (Propane) for Fuel Purposes Government of Canada Transportation of Dangerous Goods Act, S.C. 1992, c. 34, and the Transportation of Dangerous Goods Regulations, as amended from time to time Weights and Measures Act, R.S.C. 1985, c. W-6 NRC (National Research Council Canada) National Building Code of Canada, 2005 UL (Underwriters Laboratories Inc.) 144 LP-Gas Regulators 959 Medium Heat Appliance Factory-Built Chimneys ULC (Underwriters Laboratories of Canada) C Flexible Metallic Hose CAN/ULC-S Standard Methods of Test for Air Ducts CAN/ULC-S Standard Method of Test for Determination of Non-Combustibility in Building Materials 4 January 2010

23 Canadian Standards Association Natural gas and propane installation code CAN/ULC-S604-M91 Standard for Factory-Built Type A Chimneys CAN/ULC-S605-M91 Standard for Gas Vents CAN/ULC-S609-M89 Standard for Low Temperature Vents Type L CAN/ULC-S629-M87 Standard for 650 C Factory-Built Chimneys S Standard for Lining Systems for Existing Masonry or Factory-Built Chimneys and Vents S Standard for Type BH Gas Venting Systems CAN/ULC-S Standard for Compounds and Tapes for Threaded Pipe Joints 3 Definitions Note: Throughout this Code, certain terms appear in bold italic type. These terms have been defined in this Clause to ensure understanding of their intended meaning in this Code. Defined terms have been highlighted in bold italic type only in certain key contexts. It is the responsibility of the user to ensure that the defined terms are understood in accordance with this Clause, whether or not they appear in bold italic type. The following definitions apply in this Code: Accessory a part capable of performing an independent function and contributing to the operation of the appliance that it serves. Air supply (with respect to the installation of an appliance) combustion air, excess air, flue gas dilution air, primary air, secondary air, and ventilation air. Combustion air the air required for satisfactory combustion of gas, including excess air. Excess air that portion of the combustion air that is supplied to the combustion zone in excess of that which is theoretically required for complete combustion. Flue gas dilution air the ambient air that is admitted to a venting system at the draft hood, draft diverter, or draft regulator. Primary air that portion of the combustion air that is supplied for the initial stages of the combustion process and is supplied upstream from the point of ignition. Secondary air that portion of the combustion air that is supplied for the intermediate and final stages of the combustion process and is supplied downstream from the point of ignition. Ventilation air air that is admitted to a space containing an appliance to replace air exhausted through a ventilation opening or by means of exfiltration. Appliance a device to convert gas into energy; the term includes any component, control, wiring, piping, or tubing required to be part of the device. January

24 B Canadian Standards Association Category I appliance an appliance that operates with a nonpositive vent static pressure and with a flue loss not less than 17%. Note: This category consists of draft-hood-equipped appliances, appliances labelled as Category I, and fan-assisted appliances for venting into Type B vents. Category II appliance an appliance that operates with a nonpositive vent static pressure and with a flue loss less than 17%. Category III appliance an appliance that operates with a positive vent static pressure and with a flue loss not less than 17%. Category IV appliance an appliance that operates with a positive vent static pressure and with a flue loss less than 17%. Approved acceptable to the authority having jurisdiction. Authority having jurisdiction the governmental body responsible for the enforcement of any part of this Code, or the official or agency designated by that body to exercise such a function. Automatic vent damper device a device intended for installation at the outlet or downstream of an individual appliance draft hood and designed to automatically open the venting system before or shortly after the main burner is activated and to automatically close the venting system after the main burner is deactivated. Electrically operated vent damper device an automatic vent damper device that is controlled by electrical energy. Thermally actuated vent damper device an automatic vent damper device dependent for operation exclusively upon the direct conversion of the thermal energy of the vent gases into mechanical energy. Baffle a stationary device used to divert the flow of fluid (air, water, or steam) and flue gases (in the case of a flue baffle) or used to shield parts of an appliance from the effects of flame (in the case of a flame baffle) or heat (in the case of a heat baffle). Bathroom a room used primarily for bathing and containing a bathtub and/or shower. Bedroom a room furnished with a bed and used primarily for sleeping. Bed-sitting room a one-room apartment serving as both a bedroom and a sitting room. Bleed vent a vent where the expiration or inspiration of air or gas occurs from or to one side of a diaphragm of any accessory, component, or equipment such as a valve, pressure regulator, or switch. Boiler an appliance intended to supply hot liquid or vapour for space-heating, processing, or power purposes. Branch line the part of a piping or tubing system that conveys gas from the main piping or tubing or header to an appliance(s). Building a structure or part thereof used or intended for supporting or sheltering persons, animals, or property and classified by its occupancy in accordance with the applicable building code of the authority having jurisdiction or, in the absence of such a code, in accordance with the National Building Code of Canada. Aircraft hangar a building or other structure in any part of which aircraft are housed or stored and in which aircraft can undergo servicing, repairs, or alterations. 6 January 2010

25 Canadian Standards Association Natural gas and propane installation code Assembly building any building or part of a building used by a gathering of persons for civic, political, travel, religious, social, educational, recreational, or like purposes, or for the consumption of food or drink. Care or detention occupancy building any building or part thereof used or occupied by persons who require special care or treatment because of cognitive or physical limitations, or by persons who are incapable of self-preservation and who are restrained from self-destruction by security measures not under their control. Commercial building any building used in connection with direct trade with, or service of, the public. Industrial building any building used in connection with production or process work or with storage or warehousing. Residential building any building or part thereof used by persons for whom sleeping accommodation is provided but who are not harboured or detained to receive medical care or treatment or are not involuntarily detained. Building opening a planned aperture that is intended to permit air infiltration but does not include an exhaust vent or a non-openable window. Burner a device or group of devices that forms an integral unit for the introduction of gas, with or without air or oxygen, into the combustion zone for ignition. Fan-assisted burner a burner in which the combustion air is supplied by a mechanical device such as a fan or blower at sufficient pressure to overcome the resistance of the burner only. Forced-draft burner a burner in which the combustion air is supplied by a mechanical device such as a fan or blower at sufficient pressure to overcome the resistance of the burner and the appliance. Natural-draft burner a burner that is not equipped with a mechanical device for supplying combustion air. Certified (with respect to any appliance, accessory, component, equipment, or manufacturer s installation instructions) investigated and identified by a designated testing organization as conforming to recognized standards, requirements, or accepted test reports. Chimney a primarily vertical shaft that encloses at least one flue for conducting flue gases outdoors. Factory-built chimney a chimney that consists entirely of factory-made parts, each designed to be assembled with the other without requiring fabrication on site. Masonry or concrete chimney a chimney of brick, stone, concrete, or approved masonry units constructed on site. Metal chimney (smokestack) a single-wall chimney of metal constructed on site. Chimney draft see Draft. Combustible material that fails to conform to CAN/ULC-S114 requirements for noncombustibility. Combustible liquid a liquid that has a flashpoint at or above 100 F (38 C) and below 200 F (93 C). Combustion air see Air supply. Combustion products constituents that result from the combustion of gas with the oxygen of the air and include inert gases but exclude excess air. January

26 B Canadian Standards Association Combustion safety control (flame safeguard) a primary safety control that senses the presence of flame and causes gas to be shut off in the event of flame or ignition failure. Commercial- and industrial-type appliance or equipment an appliance or equipment other than a residential or recreational type. Commercial building see Building. Commercial cooking appliance an appliance that complies with the applicable CSA Standard covering hotel and restaurant ranges and unit broilers, hotel and restaurant deep fat fryers, commercial baking and roasting ovens, counter appliances, kettles, steam cookers, or steam generators. Component an essential part of an appliance or equipment. Concealed piping or tubing piping or tubing that, when in place in a wall, floor, or ceiling of a finished building, is hidden from view and can only be exposed by use of a tool. The term does not apply to piping or tubing that passes directly through a wall or partition. Concrete chimney see Chimney (masonry or concrete chimney). Condensate (condensation) a liquid separated from a gas (including flue gas) due to a reduction in temperature or an increase in pressure. Container (with respect to NGV/propane storage) either a cylinder or a tank. Continuous pilot see Pilot. Cylinder (with respect to NGV/propane storage) a container designed and fabricated in accordance with the specifications of Transport Canada or the US Department of Transportation for the storage and transportation of gas. Cylinder system an assembly that includes the cylinder base or bracket, cylinder, cylinder valve, manifold valve assembly, regulator, and relief valve, or any combination of these. Damper a plate or valve for regulating the flow of air or flue gas. Barometric damper see Draft regulator. Depressurization the maximum appliance input rating of a Category I appliance equipped with a draft hood that could be attached to the vent when the appliance is located in a structure that can experience sustained depressurization of up to 0.02 in w.c. (5 Pa), e.g., a tight structure with a mechanically ventilated structure. See Annex C. Direct-fired appliance an appliance in which the combustion products or flue gases are intermixed with the medium being heated. Direct-vent appliance an appliance constructed so that all the combustion air is supplied directly from, and the products of combustion are vented directly to, the outdoors by independent enclosed passageways connected directly to the appliance. Dirt pocket (dust pocket) a pocket in a piping system designed for the collection of dirt and from which the dirt can be removed. Draft the flow of air or combustion products, or both, through an appliance and its venting system. Chimney draft the available natural draft of the chimney measured at or near the base of the chimney. 8 January 2010

27 Canadian Standards Association Natural gas and propane installation code Mechanical draft a draft produced by a mechanical device, such as a fan, blower, or aspirator, that can supplement natural draft. Forced draft a mechanical draft produced by a device upstream from the combustion zone of an appliance. Induced draft a mechanical draft produced by a device downstream from the combustion zone of an appliance. Natural draft a draft other than a mechanical draft. Draft-control device either a draft hood or a draft regulator. Draft hood a draft-control device having neither movable nor adjustable parts. A draft hood may be built into an appliance, attached to an appliance, or made part of a vent connector. It is designed to (a) ensure the ready escape of flue gases from the combustion chamber in the event of either no draft or stoppage downstream from the draft hood; (b) (c) prevent a backdraft from entering the combustion chamber of the appliance; and neutralize the effect of stack action of either a chimney or a vent upon the operation of the appliance. Draft regulator (barometric damper) a draft-control device intended to stabilize the natural draft in an appliance by admitting room air to the venting system. A double-acting draft regulator is one whose balancing damper is free to move in either direction. Drip pocket (drip) a pocket in a piping system designed for the collection of condensate and from which the condensate can be removed. Dust pocket see Dirt pocket. Dwelling unit a housekeeping unit used or intended to be used as a domicile by one or more persons, and usually containing cooking, eating, living, sleeping, and sanitary facilities. Emergency use generators (generators) engines that operate to provide power to critical operational support such as protection of property, fire fighting activities, and building evacuation. Enclosure a secondary structure (room) within or attached to a structure (building) in which an appliance is installed. Engine a device that performs mechanical work that is used to operate other machinery and equipment. Reciprocating engine (also know as a piston engine) an engine that utilizes one or more pistons in order to convert pressure into a rotating motion. Turbine engine a rotary engine that extracts energy from a flow of combustion gas. It has an upstream compressor coupled to a downstream turbine and a combustion chamber in between. (Gas turbine may also refer to the turbine element.) Equipment a device, other than an appliance, accessory, or component, that is connected to a piping or tubing system. Excess air see Air supply. Expanding pilot see Pilot. Factory-built chimney see Chimney. January

28 B Canadian Standards Association False ceiling space ceiling space that is enclosed with tiles or panels that are removable without the use of a tool. A typical type is the T-bar-constructed suspended ceiling. Fan-assisted burner see Burner. Fan-assisted combustion system an appliance equipped with an integral mechanical means to either draw or force products of combustion through the combustion chamber and/or heat exchanger. See Annex C. FAN Max the maximum appliance input rating of a Category I appliance with a fan-assisted combustion system that could be attached to the vent. See Annex C. FAN Min the minimum appliance input rating of a Category I appliance with a fan-assisted combustion system that could be attached to the vent. See Annex C. FAN+FAN the maximum combined input rating of two or more fan-assisted appliances attached to the common vent. See Annex C. FAN+NAT the maximum combined input rating of one or more fan-assisted appliances and one or more draft-hood-equipped appliances attached to the common vent. See Annex C. Fast-closing valve see Valve. Fireplace a device for burning solid fuel that has the major portion of one or more essentially vertical sides open or openable for refuelling and for the visual effects of the burning fuel. Fitting an item in a piping or tubing system that is used as a means of connection, such as an elbow, return bend, tee, union, bushing, coupling, or cross, but does not include such functioning items as a valve or pressure regulator. Flame baffle see Baffle. Flame safeguard see Combustion safety control. Flame-sensing device that component of a combustion safety control that senses flame. Flammable liquid a liquid that has a flashpoint below 100 F (38 C) and that has a vapour pressure not exceeding 40 psia (276 kpa absolute) at 100 F (38 C). Flashpoint the minimum temperature at which a liquid within a container gives off vapour in sufficient concentration to form an ignitable mixture with air near the surface of the liquid. Floor furnace a furnace that is suspended from the floor of the space being heated and that supplies warm air to such space through integral floor or wall grilles without the use of ducts. Flue an enclosed passageway for conveying flue gases. Flue baffle see Baffle. Flue collar that portion of an appliance designed for the attachment of a draft hood, vent connector, or venting system. See Annex C. Flue damper a movable plate for regulating the flow of flue gases and intended for installation either in the flue outlet of any gas appliance or in the vent connector from an individual appliance that is not equipped with a draft-control device. Automatic flue damper a flue damper that is designed to fully open the venting system automatically before ignition of the main burner and is either interlocked to automatically close off the supply of gas to the appliance or provided with means to ensure that the damper will fall fully open upon loss of the driving medium. 10 January 2010