CSA M422:23

Preface  This is the fourth edition of CSA M422, Fire-performance and antistatic requirements for conveyor belting . It supersedes the previous editions published in 2014, 2012, and 1987.  Changes to this edition include the following:  a) The test requirements and test methods for belt types A1 and A2 have been modified as follows: i) Clause 3.2.3, on the flame propagation test;  ii) Clause 4.1.1, on samples;  iii) Clause 4.1.2, on equipment; and  iv) Clause 4.1.3, on the procedure.  b) Flame test requirements for types B1-A, B1-B, B2, and C belting have been modified as follows: i) Clause 4.2.1, on samples; and  ii) Clause 4.2.2, on equipment.  c) Drum friction test for all types of belting has been modified as follows: i) Clause 4.3.1, on samples;  ii) Clause 4.3.2, on equipment; and  iii) Clause 4.3.3, on the procedure.  d) Flame propagation test for Types A1, A2, B1-A, B1-B, and B2 belting has been modified as follows:  i) Clause 4.3.1, on the procedure.  e) Table 1 on Type A1 belting drum friction test has been modified.  f) Figure 4 b) has been added.  g) Annex B on conformity assessment has been modified.  CSA Group acknowledges that the development of this Standard was made possible, in part, by the financial support of the Canadian Association of Administrators of Labour Legislation for Occupational Safety and Health.  This Standard was prepared by the Technical Committee on Fire-Resistant Conveyor Belting under the jurisdiction of the Strategic Steering Committee on Occupational Health and Safety, and has been formally approved by the Technical Committee.  This Standard 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. Scope  1.1 Fire-performance and antistatic requirements  This Standard specifies fire-performance and antistatic requirements for new (unused) conveyor belting for use in any part of a mining or excavation operation that is below the surface.  1.2 Types of fire-performance and antistatic conveyor belting  This Standard covers fire-performance and antistatic conveyor belting of the following types:  a) Types A1 and A2 intended for use in explosive atmospheres; and  b) Types B1-A, B1-B, B2, and C intended for use in non-explosive atmospheres.  1.3 Products not covered  This Standard does not cover products of combustion or products of thermal degradation from conveyor belting subjected to fire or heating.  Note: While the intent of this Standard is to establish a reasonable level of fire-performance for conveyor belting, it is recognized that any conveyor belt material could burn under conditions different from those described in this Standard. Therefore, to ensure a higher level of fire safety, consideration should be given to installation measures such as those listed in Annex A.  1.4 Conformity assessment  A guideline for conformity assessment to this Standard is provided in Annex B.  1.5 Terminology  In this Standard, “shall” is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the Standard; “should” is used to express a recommendation or that which is advised but not required; and “may” is used to express an option or that which is permissible within the limits of the Standard.  Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material.  Notes to tables and figures are considered part of the table or figure and may be written as requirements.  Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application.