GB/T 3836.1-2021Explosive atmospheres - Part 1: Equipment - General requirements (English PDF)

Foreword

This Document was drafted as per the rules specified in GB/T 1.1-2020 Directives for

Standardization - Part 1.Rules for the Structure and Drafting of Standardizing

Documents.

This Document is Part 1 of GB/T 3836 Explosive Atmospheres. GB/T 3836 has

published the following parts.

--- Part 1.Equipment - General Requirements;

--- Part 2.Equipment Protection by Flameproof Enclosure "d";

--- Part 3.Equipment Protection by Increased Safety "e";

--- Part 4.Equipment Protection by Intrinsic Safety "i";

--- Part 5.Equipment Protection by pressurized Enclosure "p";

--- Part 6.Equipment Protection by Liquid Immersion "o";

--- Part 7.Equipment Protection by Powder Filling "q";

--- Part 8.Equipment Protection by Type of Protection "n";

--- Part 9.Equipment Protection by Encapsulation "m";

--- Part 11.Material Characteristics for Gas and Vapour Classification - Test

Methods and Data;

--- Part 12.Material Characteristics for Combustible Dusts - Test Methods;

--- Part 13.Equipment Repair, Overhaul, Reclamation and Modification;

--- Part 14.Classification of Areas - Explosive Gas Atmosphere;

--- Part 15.Electrical Installations Design, Selection and Erection;

--- Part 16.Electrical Installations Inspection and Maintenance;

--- Part 17.Equipment Protection by Pressurized Room "p" and Artificially Ventilated

Room "v";

--- Part 18.Intrinsically Safe Electrical Systems;

--- Part 20.Equipment with Equipment Protection Level (EPL) Ga;

--- Part 21.Application of Quality Systems for Equipment Manufacture;

--- Part 22.Protection of Equipment and Transmission System Using Optical

Radiation;

--- Part 23.Group I, Category EPL Ma Equipment Intended to Remain Functional in

Atmospheres Endangered by Firedamp and/or Coal Dust;

--- Part 24.Equipment Protection by Special Protection "s";

--- Part 25.Requirements for Process Sealing between Flammable Process Fluids

and Electrical Systems;

--- Part 26.Electrostatic Hazards - Guidance;

--- Part 27.Electrostatic Hazards - Test;

--- Part 28.Non-Electrical Equipment for Explosive Atmospheres - Basic Method

and Requirements;

--- Part 29.Non-Electrical Equipment for Explosive Atmospheres - Constructional

Safety "c", Control of Ignition Source "b", Liquid Immersion "k";

--- Part 30.Equipment and Components in Explosive Atmospheres in Underground

Mines;

--- Part 31.Equipment Dust Ignition Protection by Enclosure "t";

--- Part 32.Intrinsically Safe Systems with Electronically Controlled Spark Duration

Limitation;

--- Part 33.Equipment in Adverse Service Conditions;

--- Part 34.Equipment Assemblies;

--- Part 35.Classification of Areas for Explosive Dust Atmospheres.

This Document replaced GB 3836.1-2010 Explosive Atmospheres - Part 1.Equipment

- General Requirement and GB 12476.1-2013 Electrical Apparatus for Use in the

Presence of Combustible Dust - Part 1.General Requirements. Mainly based on GB

3836.1-2010, this Document integrates the major contents of GB 12476.1-2013; the

major technical changes of this Document, except the structural adjustments and

editorial modifications, are as follows.

--- Integrate the requirements of equipment for combustible dust environment;

--- Change the maximum surface temperature requirements of Group III electrical

equipment (see 5.3.2.3 of this Edition; 5.3.2.3 of 2010 Edition);

--- Increase the requirements for liner retention and the use of cement (see 6.5 of

this Edition);

--- Change the requirements of the ultrasonic source (see 6.6.3 of this Edition; 6.6.3

of 2010 Edition);

--- Change the requirements for lasers, lamps or other non-divergent continuous

wave light sources (see 6.6.4 of this Edition; 6.6.2 of 2010 Edition);

--- Increase the replacement requirements of O-shaped elastic sealing ring (see

2010 Edition);

--- Change the heat resistance test (see 26.8 of this Edition; 26.8 of 2010 Edition);

--- Change the ultraviolet (UV) resistance test (see 26.10 of this Edition; 26.10 of

2010 Edition);

--- Delete the electrification test (see 26.14 of 2010 Edition);

--- Change the capacitance measurement test (see 26.14 of this Edition; 26.15 of

2010 Edition);

--- Increase fan rating verification (see 26.15 of this Edition);

Explosive Atmospheres - Part 1.Equipment - General

Requirements

1 Scope

This Document specifies the general requirements for construction, testing and

marking of Ex Equipment and Ex Components intended for use in explosive

atmospheres.

This Document applies to equipment intended to be used in an explosive gas

atmospheres or an explosive dust atmospheres, including the equipment specified by

the supplementary documents listed in this Document, as a general requirement when

these equipment are used in an explosive atmospheres.

2 Normative References

The provisions in following documents become the provisions of this Document

through reference in this Document. For the dated documents, only the versions with

the dates indicated are applicable to this Document; for the undated documents, only

the latest version (including all the amendments) is applicable to this Document.

GB/T 70.1 Hexagon Socket Head Cap Screws (GB/T 70.1-2008, ISO 4762.2004,

MOD)

GB/T 70.2 Hexagon Socket Button Head Screws (70.2-2015, ISO 7380-1.2011,

MOD)

GB/T 70.4 Hexagon Socket Button Head Screws with Collar (70.4-2015, ISO

7380-2.2011, MOD)

GB/T 77 Hexagon Socket Set Screws with Flat Point (GB/T 77-2007, ISO

4026.2003, MOD)

GB/T 78 Hexagon Socket Set Screws with Cone Point (GB/T 78-2007, ISO

4027.2003, MOD)

GB/T 79 Hexagon Socket Set Screws with Dog Point (GB/T 79-2007, ISO

4028.2003, MOD)

GB/T 80 Hexagon Socket Set Screws with Cup Point (GB/T 80-2007, ISO

4029.2003, MOD)

GB/T 197 General Purpose Metric Screw Threads - Tolerance (GB/T 197-2018,

ISO 965-1.2013, MOD)

GB/T 755 Rotating Electrical Machines - Rating and Performance (GB/T 755-

2019, IEC 60034-1.2017, IDT)

GB/T 1040.2 Plastics - Determination of Tensile Properties - Part 2.Test

Conditions for Moulding and Extrusion Plastics (GB/T 1040.2-2006, ISO 527-

2.1993, IDT)

GB/T 1043 (all parts) Plastics - Determination of Charpy Impact Properties [ISO

179 (all parts)]

GB/T 1408.1 Electrical Strength of Insulating Materials - Test Methods - Part 1.

Tests at Power Frequencies (GB/T 1408.1-2016, IEC 60243-1.2013, IDT)

GB/T 1408.2 Electrical Strength of Insulating Materials - Test Methods - Part 2.

Additional Requirements for Tests Using Direct Voltage (GB/T 1408.2-2016, IEC

3 Terms and Definitions

For the purposes of this Document, the following terms and definitions apply.

4 Equipment Grouping

5 Temperatures

6 Requirements for All Equipment

7 Non-Metallic Enclosures and Non-Metallic Parts of

Enclosures

8 Metallic Enclosures and Metallic Parts of Enclosures

9 Fasteners