CSA B401.1:21

National Standard of Canada

Natural gas vehicle (NGV) maintenance facilities code

REVISED MARCH 2021

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  Revision History

  CSA B401.1:21, Natural gas vehicle (NGV) maintenance facilities code

  
  

  Administrative update — March 2021

  National Standard of Canada page: French version now available

  
  

  Standards Update Service

  CSA B401.1:21

  January 2021

  
  

  Title: Natural gas vehicle (NGV) maintenance facilities code

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National Standard of Canada

CSA B401.1:21

Natural gas vehicle (NGV) maintenance facilities code

Interprovincial Gas Advisory Council

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ICS 91.140.01

ISBN 978-1-4883-3224-1

© 2021 Canadian Standards Association

All rights reserved. No part of this publication may be reproduced in any form whatsoever without the prior permission of the publisher.

CSA B401.1:21 Natural gas vehicle (NGV) maintenance facilities code

Contents

Interprovincial/Territorial Gas Advisory Council (IGAC) 3

1. Assignment criteria — LNG vehicles 20

2. Assignment of LNG vehicles 21

1. Signage 21

   1. CNG/LNG signage 21

   2. Safety equipment signage 21

2. Qualifications 21

   1. Design 21

   2. Construction and installation 21

   3. Operation and maintenance 21

1. Facility requirements 22

   1. Roof and ceilings — Major and minor repair spaces 22

      1. Gas leak movement obstruction 22

      2. Gas leak entrapment 22

         
         

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         CSA B401.1:21 Natural gas vehicle (NGV) maintenance facilities code

         
         

   2. Separation provisions 22

      1. Walls and partitions 22

      2. Fire resistance 23

      3. Penetrations 23

      4. Hinged doors 23

      5. Roll-up doors 23

      6. Windows 23

   3. Pits, floors, and drains 23

      1. Pits 23

      2. Pit supports 23

      3. Egress from pits 23

      4. Floor drains 24

   4. Means of egress 24

   5. Electrical classification 24

      1. Hazardous area classifications 24

      2. Additional requirements for major repair areas 24

   6. Heating, ventilating, and air conditioning (HVAC) 25

      1. Cross ventilation 25

      2. Purge ventilation 25

      3. Normal ventilation 27

      4. Heating and air conditioning 27

      5. Fired heating equipment 28

   7. Other sources of ignition 29

   8. Detection and alarms for gas, fire, fire-suppression, safety, and security systems 29

      1. Gas-detection and -alarm systems 29

      2. Gas safety system controls 31

      3. Gas safety system testing, commissioning, and periodic inspection 32

      4. Fire-detection and fire-alarm systems, and fire-suppression systems 33

   9. Defuelling and captive venting equipment installation 33

      1. General 33

      2. Defuelling equipment 33

      3. LNG captive vent equipment 34

Annex A (informative) — Operation, maintenance, and training — CNG vehicle maintenance facilities 39

Annex B (informative) — Operation, maintenance, and training — LNG vehicle maintenance facilities 47

Annex C (informative) — Work safe/emergency response procedures — CNG and LNG vehicle maintenance facilities 55

Annex D (informative) — Enclosed parking structures — CNG and LNG 59

Annex E (informative) — Commentary 61

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CSA B401.1:21 Natural gas vehicle (NGV) maintenance facilities code

Preface

This is the first edition of CSA B401.1, Natural gas vehicle (NGV) maintenance facilities code. It supersedes previous edition published in 2018 as CSA B401 under the title Vehicle maintenance facilities code.

The following are the major changes to this edition:

1. addition of coverage to address maintenance facilities for propane vehicles. This led the creation of separate codes to address different fuel types: CSA B401.1 for natural gas and CSA B401.2 for propane;

2. addition of Annex D for private enclosed parking structures;

3. information in Annex D from the 2018 edition relocated to new Annex E; and

4. addition of Annex E, a commentary, to provide additional guidance to users of this Code.

   CSA Group acknowledges that the development of this Code was made possible, in part, by the financial support of Natural Resources Canada.

   
   

   This Code was prepared by the Subcommittee on Vehicle Maintenance Facilities Code, under the jurisdiction of the Technical Committee on Natural Gas Transportation and the Strategic Steering Committee on Transportation, and has been formally approved by the Technical Committee and the Interprovincial/Territorial Gas Advisory Council.

   This Code has been developed in compliance with Standards Council of Canada requirements for National Standards of Canada. It has been published as a National Standard of Canada by CSA Group. 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.

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   4. To submit a request for interpretation of this Code, please send the following information to inquiries@csagroup.org and include “Request for interpretation” in the subject line:

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      4. rationale for the change.

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CSA B401.1:21 Natural gas vehicle (NGV) maintenance facilities code

CSA B401.1:21

Natural gas vehicle (NGV) maintenance facilities code

1. Scope

   Note: See Annex E for explanatory material.

   
   

   1. Inclusions

      
      

      1. Vehicle maintenance

         This Code applies to the portions of a motor vehicle maintenance facility where natural-gas-fuelled vehicles are maintained, repaired, or stored during maintenance or repair, including areas and systems ancillary thereto.

         Note: See Annex E for explanatory material.

         
         

      2. Vehicle parking

         This Code also contains information on private parking structures where natural gas fuelled vehicles are parked or stored, including areas and systems ancillary thereto. See Annex D.

         
         

      3. Parking structure requirements

For purposes of this Code, private parking structures have the same requirements as minor repair areas.

1. Exclusions

   The scope of this Code does not include

   1. indoor or outdoor refuelling operations;

   2. open parking structures;

   3. public parking structures of any construction; or

   4. other fuels used for vehicles.

   
   

2. Purpose

   The purpose of this Code is to provide reasonable means to manage the risks associated with the maintenance and repair of vehicles fuelled with compressed natural gas (CNG) or liquefied natural gas (LNG) inside motor vehicle maintenance facilities.

   Note: See Annex E for explanatory material.

   
   

3. Terminology

   The terms “fuelling” and “refuelling” are used interchangeably in this Code. The terms “park” and “store” and all derivatives thereof are used interchangeably in this Code.

   
   

4. Units of record

The values given in SI units are the units of record for the purposes of this Code. The values given in parentheses are for information and comparison only.

Notes:

1) IEEE/ASTM SI 10 or ISO 80000-1 can be used as a guide when converting Imperial units to metric units.

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