GB/T 3836.2-2021 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 3836.2-2021 | English | 1055 |
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Explosive atmospheres - Part 2: Equipment protection by flameproof enclosures 'd'
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| GB 3836.2-2010 | English | 150 |
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[Replaced by GB/T 3836.2-2021] Explosive atmospheres -- Part 2: Equipment protection by flameproof enclosures d
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| GB 3836.2-2000 | English | RFQ |
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Electrical apparatus for explosive gas atmospheres-Part 2: Flameproof enclosure d
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| GB 3836.2-1983 | English | RFQ |
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Electrical apparatus for explosive atmosphere--Flameproof electrical apparatus d
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GB/T 3836.2-2021: Explosive atmospheres - Part 2: Equipment protection by flameproof enclosures 'd'
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GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 29.260.20
CCS K 35
Replacing GB 3836.2-2010
Explosive Atmospheres – Part 2.Equipment
Protection by Flameproof Enclosures “d”
(ISO 60079-1.2014, Explosive Atmospheres – Part 1.Equipment
Protection by Flameproof Enclosures “d”, MOD)
Issued on: OCTOBER 11, 2021
Implemented on: MAY 01, 2022
Issued by. State Administration for Market Regulation;
Standardization Administration of PRC.
Table of Contents
Foreword... 4
Introduction... 12
1 Scope... 15
2 Normative References... 15
3 Terms and Definitions... 16
4 Level of Protection (Equipment Protection Level, EPL)... 19
5 Flameproof Joints... 21
6 Sealed Joints... 34
7 Operating Rods... 36
8 Supplementary Requirements for Shafts and Bearings... 37
9 Light-Transmitting Parts... 40
10 Breathing and Draining Devices which form Part of a Flameproof Enclosure
... 40
11 Fasteners and Openings... 47
12 Materials... 48
13 Entries for Flameproof Enclosures... 50
14 Verification and Tests... 55
15 Type Tests... 55
16 Routine Tests... 70
17 Switchgear for Group I... 73
18 Lampholders and Lamp Caps... 74
19 Non-Metallic Enclosures and Non-Metallic Parts of Enclosures... 75
20 Marking... 77
21 Instructions... 78
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 2 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 3836.2-2010 Explosive Atmospheres - Part 2.Equipment
Protection by Flameproof Enclosures “d”. Compared with GB 3836.2-2010, this
Document made the major technical changes besides the structural adjustments and
editorial modifications.
--- Delete the clause of equipment category and temperature group (see Clause 4
of 2010 Edition);
--- Add the Clause of protection level (see Clause 4 of this Edition);
--- Add special conditions of use that the flameproof joints are not expected to be
repaired (see 5.1 of this Edition);
Explosive Atmospheres – Part 2.Equipment
Protection by Flameproof Enclosures “d”
1 Scope
This Document contains specific requirements for the construction and testing of
electrical equipment with the type of protection flameproof enclosure “d”, intended for
use in explosive gas atmospheres.
This Document is applicable to electrical equipment protected by flameproof enclosure
"d" intended to be used in explosive gas 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 197 General Purpose Metric Screw Threads – Tolerances (GB/T 197-2018,
ISO 965-1.2013, MOD)
GB/T 1406.2 Types and Dimensions of Lamp Caps - Part 2.Pin Lamp Caps (GB/T
1406.2-2008, IEC 60061-1.2005, MOD)
GB/T 2516 General Purpose Metric Screw Threads - Limit Deviations (GB/T
2516-2003, ISO 965-3.1998, MOD)
GB/T 3836.1 Explosive Atmospheres - Part 1.Equipment - General Requirements
(GB/T 3836.1-2021, IEC 60079-0.2017, MOD)
GB/T 3836.3 Explosive Atmospheres - Part 3.Equipment Protection by Increased
Safety “e” (GB/T 3836.3-2021, IEC 60079-7.2015, MOD)
GB/T 3836.4 Explosive Atmospheres - Part 4.Equipment Protection By Intrinsic
Safety “i” (GB/T 3836.4-2021, IEC 60079-11.2011, MOD)
GB/T 3836.8 Explosive Atmospheres - Part 8.Equipment Protection by Type of
Protection “n” (GB/T 3836.8-2021, IEC 60079-15.2017, MOD)
GB/T 5163 Sintered Metal Materials, Excluding Hard Metals - Permeable Sintered
Metal Materials - Determination of Density, Oil Content, and Open Porosity (GB/T
5163-2006, ISO 2738.1999, IDT)
GB/T 5249 Permeable Sintered Metal Materials - Determination of Bubble Test
Pore Size (GB/T 5249-2013, ISO 4003.1977, IDT)
GB/T 5250 Permeable Sintered Metal Materials - Determination of Fluid
Permeability (GB/T 5250-2014, ISO 4022.1987, IDT)
GB/T 9364 (all parts) Miniature Fuses [IEC 60127 (all parts)]
GB/T 19148.2 Types and Dimensions of Lamp Holders - Part 2.Pin Lamp Holders
(GB/T 19148.2-2008, IEC 60061-2.2004, MOD)
ANSI/ASME B1.20.1 Pipe Threads, General Purpose (Inch)
3 Terms and Definitions
For the purposes of this Document, the terms and definitions given in GB/T 3836.1 and
the following apply.
NOTE. Additional definitions applicable to explosive atmospheres can be found in GB/T
2900.35.
3.1 Flameproof enclosure “d”
Enclosure in which the parts which can ignite an explosive gas atmosphere are placed
and which can withstand the pressure developed during an internal explosion of an
explosive mixture, and which prevents the transmission of the explosion to the
explosive gas atmosphere surrounding the enclosure.
4 Level of Protection (Equipment Protection Level, EPL)
4.1 General
Electrical equipment with flameproof enclosure “d” shall be one of the following.
– level of protection “da” (EPL “Ma” or “Ga”);
– level of protection “db” (EPL “Mb” or “Gb”); or
– level of protection “dc” (EPL “Gc”).
The requirements of this standard shall apply to all levels of protection unless
otherwise stated.
In addition, the empty flameproof enclosure as an Ex component shall meet the
requirements of Annex D; the battery used in the flameproof enclosure shall meet the
requirements of Annex E; the flameproof enclosure with an internal release source
shall meet the additional requirements of Annex G; The motor supply power to the
inverter and with flameproof enclosure "d" shall meet the requirements of Annex H;
electrical equipment of Group I shall meet the supplementary requirements of Annex I.
5 Flameproof Joints
5.1 General requirements
All flameproof joints, whether permanently closed or designed to be opened from time
to time, shall comply, in the absence of pressure, with the appropriate requirements of
Clause 5.
The design of joints shall be appropriate to the mechanical constraints applied to them.
The dimensions given in 5.2 to 5.5 specify the essential parameters of flamepaths. In
instances where any of the following apply (for example, in order to comply with the
test for non-transmission of an internal ignition).
– the minimum length of the flameproof joint as stated by the documentation is
greater than the relevant minimum; or
– the maximum gap of the flameproof joint as stated by the documentation is less
than the relevant maximum; or
6 Sealed Joints
6.1 Cemented joints
6.1.1 General
7 Operating Rods
Where an operating rod passes through the wall of a flameproof enclosure, the
following requirements shall be met.
– if the diameter of the operating rod exceeds the minimum width of the joint
specified in Tables 2 and 3, the width of the joint shall be at least equal to this
diameter but without, however, having to exceed 25 mm;
9 Light-Transmitting Parts
For light-transmitting parts of other than glass, the requirements in Clause 19 of this
standard apply.
NOTE. Mountings of light-transmitting parts, of any material that produces internal mechanical
stress in those parts, can result in failure of the light-transmitting part.
10 Breathing and Draining Devices which form Part of
a Flameproof Enclosure
10.1 General
Breathing and draining devices shall incorporate permeable elements which can
withstand the pressure created by an internal explosion in the enclosure to which they
are fitted, and which shall prevent the transmission of the explosion to the explosive
atmosphere surrounding the enclosure.
They shall also withstand the dynamic effects of explosions within the flameproof
enclosure without permanent distortion or damage which would impair their flame-
arresting properties. They are not intended to withstand continuous burning on their
surfaces.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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