This section specifies the basic methods and requirements for the design, construction, testing, and labeling of non electrical equipment used in potentially explosive environments such as gases, vapors, mist, and air, as well as dust and air. This section is applicable to environments with atmospheric pressure ranging from 0.08MPa to 0.11MPa and ambient temperature ranging from -20 ℃ to+60 ℃. Such environmental conditions may also occur inside the equipment. This is due to fluctuations in the internal working pressure and/or temperature of the equipment, which can form natural respiration, causing the external atmosphere to inhale into the equipment. Table of Contents Preface III 1 Scope 12 Normative References 13 Terminology and Definitions 24 Equipment Categories and Protection Levels 45 Ignition Hazard Assessment Methods 56 Temperature 87 Non metallic Components of Equipment 98 External Components of Equipment Containing Light Metals 109 Detachable Parts 1010 Bonding Materials 1011 Connections of Grounding Conductive Parts 1112 Transparent Parts 1113 Type Inspection and Testing 1114 Marks 1415 User Manual 17 Appendix A (Normative Appendix) Method for Confirming Equipment Level 18 Appendix B (Informative Appendix) Ignition Hazard Assessment 19 Appendix C (Normative Appendix) Electrification Test of Non conductive Materials 23 Appendix D (Normative Appendix) Example of Impact Test Device 24 Appendix E (Normative Appendix) Inspection Procedure for Obtaining Explosion Proof Certificate 25