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GB 25286.3-2010: Non-electrical equipment for use in potentially explosive atmospheres -- Part 3: Protection by flameproof enclosure “d”
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Non-electrical equipment for use in potentially explosive atmospheres -- Part 3: Protection by flameproof enclosure “d”
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Basic data | Standard ID | GB 25286.3-2010 (GB25286.3-2010) | | Description (Translated English) | Non-electrical equipment for use in potentially explosive atmospheres -- Part 3: Protection by flameproof enclosure ��d�� | | Sector / Industry | National Standard | | Classification of Chinese Standard | K35 | | Classification of International Standard | 29.260.20 | | Word Count Estimation | 10,122 | | Date of Issue | 2010-11-10 | | Date of Implementation | 2011-09-01 | | Quoted Standard | GB 3836.1-2010; GB 3836.2-2010; GB 20800.1-2006; GB 20800.2-2006; GB 20800.3-2008; GB 25285.1-2010; GB 25285.2-2010; GB 25286.1-2010; EN 50303 | | Adopted Standard | EN 13463-3-2005, MOD | | Regulation (derived from) | Announcement of Newly Approved National Standards 2010 No. 8 (No. 163 overall) | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This Chinese standard specifies the type using flameproof enclosure"d"protection for explosive gas and/or combustible dust environment equipment design, evaluation, construction and test requirements. | GB 25286.3-2010: Non-electrical equipment for use in potentially explosive atmospheres -- Part 3: Protection by flameproof enclosure “d”
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Non-electrical equipment for use in potentially explosive atmospheres.Part 3. Protection by flameproof enclosure "d"
ICS 29.260.20
K35
National Standards of People's Republic of China
Non-electrical equipment for explosive atmospheres
Part 3. type flameproof enclosure "d"
Part 3. Protectionbyflameproofenclosure "d"
Published 2010-11-10
2011-09-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China issued
Foreword
All technical contents of this section is mandatory.
GB 25286 "non-explosive atmospheres Electrical Equipment" contains the following sections.
--- Part 1. Basic method and requirements;
--- Part 2. limiting shell type "fr";
--- Part 3. type flameproof enclosure "d";
--- section 4. intrinsically safe type "g" (under consideration);
--- Part 5. Structure safe "c";
--- Part 6. Control type ignition source "b";
--- part 7. Pressurized "p" (under consideration);
--- Part 8. liquid immersion "k".
This part of GB 25286 "non-explosive atmospheres electrical equipment" Part 3, is modified using EN13463-3.2005 "potentially explosive
Environmental non-fried electrical equipment - Part 3. type flameproof enclosure "d" "(in English) developed.
This section and EN13463-3.2005 is the main difference. In order to converge with GB 3836.1 statements, this section will EN13463-3.
In 2005 M1, M2 respectively correspond to stage device of this section Ma, Mb stage equipment; the EN13463-3.2005 in class Ⅱ 1G, 2G, 3G
Level equipment corresponds to a part of the class were Ⅱ Ga, Gb, Gc-level device; and EN13463-3.2005 in class Ⅱ 1D, 2D, 3D-level device respectively
This part corresponds to class Ⅲ Da, Db, Dc stage equipment; flag also made the corresponding change. In addition, remove the EN13463-3.2005 and this
Part of the independent informative annex ZA.
Appendix A of this section, Appendices B and C are normative.
This section was proposed by China Electrical Equipment Industrial Association.
This part of the jurisdiction of the National Standardization Technical Committee explosion-proof electrical equipment.
This part was drafted. Nanyang Explosion Electric Institute, the national explosion-proof electrical products for Quality Supervision and Inspection Center, Changzhou Power Station Auxiliary Equipment
Factory Co., Ltd., Zhejiang Hangzhou Construction Machinery Co., Ltd. Guangzhou Hongxing ventilation equipment.
The main drafters of this section. Wang Jun, Zhang Gang, Zhang Lixiao, Liu Heng cloud, ginger orientation, Huang Xiaoping, Yang Jinnan.
Introduction
A gas, vapor explosive atmosphere, air with mist and/or combustible dust and air is formed in some types of non-electrical equipment
Contains effective ignition sources under normal operating conditions, measures must be taken against these types of non-electrical equipment, it can not be the surrounding environment
The ignition source. One way of achieving this is to use a housing surrounding the ignition source, the interior of the housing is not transmitted to ignite the external environment. this
Such predetermined portion is called a "type flameproof enclosure" type protection.
The basic principle of the flameproof housing preventing ignition, the gases or vapors may be/into the housing by flange joints, if the inner housing burst
Fried lit environment, there will be neither significant deformation of the housing, not by bonding the flame/flange escape outside explosive atmospheres. this
Principle requires the housing must be strong, and to control the size of the joining surface/flange, so that the maximum permissible safety gap may occur in the apparatus
Portion explosive gas/vapor type of fit.
Concept of protection flameproof enclosure thus formed, allowing a variety of devices continuously produce sparks safely used in a potentially explosive environment field
The. It is well known for electrical equipment, this type of protection may be used to protect the spark, arc element. This form of protection in
GB 3836.1-2010 has defined and specified. Because the electrical device comprises a universal test standard has been verified and marking requirements, in the present non-electric
Gas Devices section, to avoid unnecessary repetition claims by reference to electrical standards. In this section, only the full non-electrically write
Gas devices provide the necessary protection of the different part.
Present a different section, in addition to electrical equipment of type Ⅰ Mb, GB 3836.2 explosive environment without considering dust formation, its associated
General requirements document, GB 3836.1-2010 defines explosive atmospheres (explosive mine mainly composed of methane gas) for biogas
The flameproof electrical equipment may be used where coal dust cloud appears, its design, construction and testing without changing or further testing.
In the gas/air mixture in the test prevent dust cloud ignition protection device in the present concept also applies to the section level class Ⅰ Mb Mining
Equipment and class Ⅱ Gb, Gc and grade class Ⅲ Db, Dc stage non-mining equipment, because it presents an acceptable safety to prevent ignition
Full factor, it allows an easier way to test and validate the proof performance.
Flameproof enclosure can be non-electrical equipment protected by the following examples.
Device latent heat of friction surface a) has over its ignition temperature of the surrounding environment, for example. a friction clutch, brake linings;
b) In order to correctly implement the functions of the device which must operate at high temperatures, for example. catalytic combustion engine exhaust system flameproof trans
The reactor, the catalytic element or a heat measuring instrument combustible gas sensor;
c) generating a spark ignition friction device during normal operation.
Currently manufactured into flameproof equipment is rarely used in dusty environments, since the use of the device dust-tight enclosure is usually cheaper, but if it is both
Including dust and gas including non-mining environment, this is also applicable.
Where dust alone, although formation of dust accumulation, does not generally produce explosive dust cloud within the housing. This section does not consider
Dust accumulation occurs within the enclosure cause a fire hazard because it does not belong to the concept of protection flameproof enclosure.
Non-electrical equipment for explosive atmospheres
Part 3. type flameproof enclosure "d"
1 Scope
This section specifies the type employed flameproof enclosure "d" is designed for the protection of explosive gas and/or combustible dust device, Review
Set, and the structural requirements of the test.
This complements the part of GB 25286.1, GB 25286.1 content are also fully applicable to devices fabricated in accordance with the provisions of this section.
Equipment to comply with the relevant provisions of the section meet the requirements of the following levels.
--- Class Ⅰ Mb stage device, when operating under normal operating conditions and harsh, especially in rough handling conditions and environmental changes, no
Now caused by the fire ignition source;
--- Class Ⅱ Gb Db class Ⅲ grade or stage device, does not occur under normal operating and fault conditions caused by the fire is expected ignition source.
Predetermined type of protection may be employed alone or in this section in conjunction with other types of protection, according to the ignition risk in GB 25286.1
Risk assessment, the device class or a class Ⅰ Mb level protection Ⅱ Ga, Gb and grade class Ⅲ Da, Db level equipment.
Note. Class Ⅰ national standards Ma-class equipment to develop in progress. Refer to standard EN50303 provisions regarding Ⅰ class M1 level (corresponding to the present portion
Level Ma) device, including the requirements of electrical and non-electrical devices.
This section is not applicable to organic peroxide and sulfur dust equipment.
This does not apply to the explosion-proof electrical equipment or reciprocating engines. Electrical equipment shall GB 3836.1 and GB 3836.2; reciprocally
Internal combustion engines shall GB 20800.1, GB 20800.2 and GB 20800.3.
2 Normative references
Terms of the following documents constitute provisions of this section by reference in this part of GB 25286. For dated reference documents
Pieces, all subsequent amendments (excluding corrections) or revisions do not apply to this section, however, encouraged to reach under this section
Whether the parties to the agreement to use the latest versions of these documents. For undated reference documents, the latest versions apply to this
section.
GB 3836.1-2010 explosive atmospheres - Part 1. General requirements for equipment (IEC 60079-0.2007, MOD)
GB 3836.2-2010 explosive atmospheres - Part 2. the device by a flameproof enclosure "d" protected (IEC 60079-1.2007,
MOD)
GB 20800.1-2006 explosive environment proof art reciprocating internal combustion engine General Part 1. flammable gases and vapors ring
With an internal combustion engine environment class Ⅱ
GB 20800.2-2006 explosive environment proof art reciprocating internal combustion engines General Part 2. combustible dust
Engine class Ⅱ
GB 20800.3-2008 explosive environment proof art reciprocating internal combustion engines General Part 3. the presence of methane and (or) a combustible
Underground mine roadway dusts engine with class Ⅰ
GB 25285.1-2010 explosive atmospheres explosion prevention and protection - Part 1. Basic Principles and Methods
GB 25285.2-2010 explosive atmospheres explosion prevention and protection - Part 2. Basic Principles mine explosion prevention and protection
And methods
GB 25286.1-2010 non-electrical equipment explosive atmospheres - Part 1. Basic method and requirements
EN50303 for gas and/or equipment class Ⅰ M1 stage dust environment
3 Terms and Definitions
This part is GB 25285.1-2010, GB 25285.2-2010, GB 25286.1-2010, GB 3836.1-2010 and
GB 3836.2-2010 and established in the following terms and definitions.
3.1
Flameproof enclosure "d" flameproofenclosure "d"
Kind of protection. When equipped with internal parts can ignite an explosive environment, able to withstand an explosive mixture inside the shell explosion
Pressure generated while an internal explosion propagation can be prevented to the explosive atmosphere surrounding the housing.
General requirements and determining applicability 4
4.1 suitability determination
Before using the apparatus or method for protecting device assembly according to the predetermined portion (including the interconnecting member), shall be in accordance with GB 25286.1
Ignition hazard assessment carried out first. Furthermore, assessment should determine the type type flameproof enclosure "d" and a potential ignition source apparatus adapted, can be achieved provided
Protection class equipment category and level requirements.
GB 25286.1 predetermined temperature classification, and classification apparatus suitable for the present section.
GB 3836.1 predetermined gas category ⅡA, ⅡB ⅡC segments and also apply to this part of the device class Ⅱ (reference to different
Device environment of gas or vapor). GB 3836.1 predetermined categories ⅢA, ⅢB ⅢC segments and apply to this part of the device class Ⅲ
Requirements (dust reference to different device environment).
4.2 General Requirements
This part of the content of references cited in GB 3836.2 portion of GB 3836.1, reference should GB 25286.1, if there is a conflict should
Priority GB 25286.1.
5 proof joints
Flameproof joints shall comply with the requirements of Chapter 5 GB 3836.2-2010, which contains the different requirements of the largest gas group between
Slot table.
In the application GB 3836.2-2010 requirements of Chapter 5, the following terms shall change.
a) GB 3836.2-2010 in "Electrical" is the word in Chapter 5 should be "non-electrical" instead.
b) GB 3836.2-2010 in 5.1 shall be replaced by the following.
"When in accordance 15.1 (casing pressure test) test, the housing should not have a permanent deformation, nor should be reduced so that the housing flameproof properties
Unacceptable damage to the extent that the mechanical strength of the housing can not be reduced or expanded gap flameproof joint. "
"When in accordance 15.2 (non-transmission of an internal ignition test) test, a housing engagement surface which should not be transmitted through the pilot flame."
Whether it is closed or opened from a long-term housing, their interfaces to meet the requirements of Chapter 5 should be no pressure.
Note. The value of GB 3836.2-2010 given in Chapter 5 is the minimum requirement. In order to pass the test for non-transmission we need to take other measures.
Surface explosion should take anti-corrosion measures.
Proof paint surface is not allowed. Other coating material, if the material itself and demonstrated no coating method for bonding the flameproof properties
Adverse effects, can also be used.
6 Cemented joints
Cemented joints shall comply with the relevant requirements of GB 3836.2.
7 Joystick
Joystick shall comply with the relevant requirements of GB 3836.2.
Additional requirements for shaft and bearing of 8
Shaft and bearings shall comply with the requirements of Chapter 8 GB 3836.2-2010.
GB 3836.2-2010 8.1 and 8.2 as well as in GB 3836.2-2010 17, 18, 19 and 20 "Electrical"
Replaced by the term "non-electrical."
9 Transparency
A transparent member consisting of non-electrical equipment housing part of the endoscope and the observation window shall comply with the requirements of GB 3836.2. GB 3836.2 in
Reference should be changed to refer to GB 3836.1 GB 25286.1.
10 breathing and draining means constituting flameproof enclosure member
Breathing and draining means constituting flameproof enclosure member should meet the requirements of GB 3836.2.
GB 3836.2 GB 3836.1 should be replaced with reference to reference GB 25286.1.
Note. Additional requirements for the corrugated strip-like elements of the breathing and draining devices and require additional channel elements are unpredictable see Appendices A and B.
Fastener 11, and closure means associated holes
Fasteners, and closure means associated holes should meet the requirements of GB 3836.2. GB 3836.2-2010 11.9 "Cable
Introduction means or conduit sealing device "shall be taken to include non-electrical equipment, and piping means for introducing the protective effective and necessary to close the class
Like opening.
Materials and mechanical strength of the housing 12; the material within the housing
The mechanical strength of the housing material and shall comply with the requirements of GB 3836.2; material should be within the housing to meet the relevant GB 3836.2
Claim. GB 3836.2-2010 section 12.6 (CTI electrically insulating material) independent of the non-electrical equipment, is not considered.
Flameproof enclosure introduction means 13
Although it is impossible as there is an electrical device such as a cable into the electrical isolation means for non-electrical equipment, however, if there is a non-electrical enclosure
Similar types of apparatus to be incorporated, as required to be specified chapter 13 GB 3836.2-2010 and GB 3836.2-2010 Appendix C
Seeking to experiment.
Introducing non-electrical connector device is flameproof shall comply GB 3836.2-2010 13.3.1, and should the warning mark
Knowledge. "No separation when the device is working."
The following changes should apply here.
A) "wire" should be viewed through the cannula through the housing wall of the solid material/rope. For example. To the light passes from one chamber to another chamber
While passing through the inner wall (via cannula) to a fiber optic core;
b) GB 3836.2-2010 involved in 13.4 C.2.1.4, which should be considered with reference to the reference GB 3836.1 GB 25286.1-
2010; "electrical equipment" should be considered as "non-electrical equipment."
Note. Additional requirements flameproof introducing means shown in Appendix C.
14 inspection and testing
GB 3836.2-2010 Chapter 14 does not apply to non-electrical equipment, since it determines the maximum surface temperature associated with some electrical equipment.
15 Type tests
Note. The scope of the wide portion than GB 3836.2-2010 (GB 3836.2-2010 version of the test device with only explosive gas atmospheres), increased
The presence of combustible dust terms of equipment, see 15.2.
15.1 type test for flameproof explosive gas or non-electrical equipment vapor/air mixture
Flameproof electrical equipment for non-explosive gas and/or steam air mixture meet the requirements of GB 3836.2-2010 Chapter 15,
This provision is a gas and vapor atmospheres type test equipment used. All references in GB 3836.2 GB 3836.1 Chu should be seen as a reference
Test GB 25286.1.
15.2 for Test Type combustible dust/air mixture in a non-electrical devices environment
For combustible dust (except those mentioned in Chapter 1 of this section) of an explosive atmosphere shall enclosure.
a) above in accordance with the requirements of 15.1, a gas explosion experiment with ⅡA type of equipment/air mixture;
b) be able to withstand pressure, and type of equipment comply with requirements to prevent ⅡA flame of the booster.
NOTE. This section only predetermined flameproof enclosure "d" of the non-electrical equipment for combustible dust ignition-protection is usually not practical. this is
Because it is simpler and more economical structure of dust ignition proof enclosure to achieve the same level (for example. a rugged casing simple joints, to prevent solid foreign
From entering the degree of protection provided for the GB 4208 IP6X). This prevents the combustible dust into the housing, and therefore prevents the formation in the housing
Explosive dust cloud.
16 Routine tests
Routine tests shall meet the requirements (routine test shall be performed on each housing) GB 3836.2-2010 Chapter 16.
Switch 17
GB 3836.2-2010 Chapter required on electrical switch 17 is not applicable to non-electrical equipment.
18 lamps and lamp
GB 3836.2-2010 requirements of Chapter 18 is on the socket and the cap is not applicable non-electrical equipment.
19 Non-metallic enclosures and non-metallic member
Non-metallic enclosures and non-metallic parts shall comply with the requirements of GB 3836.2-2010.
20 using capillary device
Capillary devices shall meet the requirements in 3836.2-2010 5.5 GB .
21 specification and file
21.1 manuals
Comply with this part of the device shall comply with the requirements of GB 25286.1 manual, in addition.
a) If necessary, the device detailed installation instructions;
b) a statement related to housing maintenance and their recommended service life;
c) if necessary, in order to prevent corrosion of flameproof joint, it may be applied to the bonding surface without affecting the level of bonding the anti-ignition properties
Complexes of the type described (see the 5.1 GB 3836.2-2010, as a cross-reference in this section);
d) the pressure on avoiding overlap warning, if there is a non-limiting connection between the individual pipes flameproof enclosure, a pressure overlap;
e) a warning device is not available for sulfur and an organic peroxide dust dust environment.
21.2 Technical Paper
DESCRIPTION documentation as required by this section shall include the following manuals and technical documents.
a) the purpose and use;
Proof type, temperature and related standards group b) requirements;
c) Model significance;
d) function;
e) elements and/or materials to allow material and maximum temperature --- correct feature values; for example, a housing or a non-member used in the manufacture
Description full description and selection of materials based on metal material, if necessary, as well as inspection reports;
f) Other structure;
g) installation instructions;
h) Main drawings. FIG total, FIGS member and attached documents;
i) a routine test requirements, any result of the calculation, the table gap, the adhesive bonding the table, the adhesive material comprising an adhesive bonding, most
High temperature, if necessary, there should be a temperature test reports, test reports the IP level;
j) indicates that results of the test pressure and type testing consistent with the provisions of section 15.2 and 15.1 of the eligibility requirements of the inspection reports. no
Then, reasons related to the type of test equipment not done (eg. too small a volume).
22 logo
In addition to meeting the requirements of GB 25286.1 a flag, the flag must comply with this section should include a particular symbol "d" (represented flameproof
Anti-burning type).
For explosive gas atmospheres Ⅱ Gb level, temperature class mark T4 explosion-proof apparatus of Example.
Ex dⅡT4 Gb
Class Ⅰ Mb stage explosion flag exemplary device.
Ex dⅠ Mb
Appendix A
(Normative)
Additional requirements for the corrugated strip-like elements of breathing and draining means
Corrugated strip-like element breathing and draining means should meet the requirements of the Appendix A, GB 3836.2-2010.
Appendix B
(Normative)
Additional requirements have unpredictable channel elements of breathing and draining means
Breathing and draining passage means having undetectable element should meet the requirements of the Appendix B GB 3836.2-2010.
Appendix C
(Normative)
Additional requirements flameproof introduction means
Appendix C requirements GB 3836.2-2010 housing cable entry does not apply. But it should be used GB 3836.2-2010 Appendix C
The test methods and pass/fail criterion for pressure testing of pipes of non-compression type electrical device housing introduction means. For
This test, applied a solid rod/mandrel through the pipe instead of the compression type air introduction means.
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