GB/T 3836.29-2021 English PDF (GBT3836.29-2021)

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GB/T 3836.29-2021: Explosive atmospheres -- Part 29: Non-electrical equipment for explosive atmospheres - Constructional safety 'c', control of ignition source 'b', liquid immersion 'k'
GB/T 3836.29-2021
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 29.260.20
CCS K 35
Replacing GB 25286.5-2010, GB25286.6-2010, GB 25286.8-2010
Explosive atmospheres – Part 29: Non-electrical
equipment for explosive atmospheres –
Constructional safety “c”, control of ignition source
“b”, liquid immersion “k”
“c”, 控制点燃源型“b”, 液浸型“k”
(ISO 80079-37:2016, Explosive atmosphere – Part 37: Non-electrical
equipment for explosive atmospheres – Non electrical type of protection
constructional safety “c”, control of ignition source “b”, liquid immersion “k”
ISSUED ON: OCTOBER 11, 2021
IMPLEMENTED ON: MAY 01, 2022
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s Republic of
China.
Table of Contents
Foreword ... 4 
Introduction ... 9 
1 Scope ... 12 
2 Normative references ... 12 
3 Terms and definitions ... 13 
4 Determination of suitability ... 15 
5 Requirements for equipment with Type of Protection constructional safety “c”
... 16 
5.1 General requirements... 16 
5.2 Ingress protection ... 16 
5.3 Seals for moving parts... 17 
5.4 Equipment lubricants, coolants and fluids ... 18 
5.5 Vibration ... 18 
5.6 Requirements for moving parts ... 18 
5.7 Requirements for bearings ... 19 
5.8 Requirements for power transmission systems ... 22 
5.9 Requirements for clutches and variable speed couplings ... 25 
5.10 Flexible couplings ... 26 
5.11 Requirements for brakes and braking systems ... 27 
5.12 Requirements for springs and absorbing elements ... 28 
5.13 Requirements for conveyor belts... 28 
6 Requirements for equipment with Type of Protection control of ignition source
“b” ... 29 
6.1 General ... 29 
6.2 Determination of the control parameters ... 30 
6.3 Ignition prevention system design and settings ... 31 
6.4 Ignition protection of sensors and actuators ... 32 
6.5 Ignition protection types ... 32 
7 Requirements for equipment with Type of Protection liquid immersion “k” .. 36 
7.1 Determination of the maximum / minimum criteria ... 36 
7.2 Protective liquid ... 37 
7.3 Equipment construction ... 37 
8 Type tests ... 40 
8.1 Type tests for equipment with Type of Protection constructional safety “c” ... 40 
8.2 Type tests for equipment with Type of Protection control of ignition source “b”
... 40 
8.3 Type tests for equipment with Type of Protection liquid immersion “k” ... 40 
9 Documentation ... 41 
9.1 Documentation for equipment with Type of Protection constructional safety “c”
... 41 
9.2 Documentation for equipment with Type of Protection control of ignition
sources “b” ... 41 
9.3 Documentation for equipment with Type of Protection liquid immersion “k” .. 42 
10 Marking ... 42 
10.1 General ... 42 
10.2 Safety devices ... 43 
Annex A (Normative) Approach and application: equipment with Type of
Protection “c”... 44 
Annex B (Normative) Test requirements ... 56 
Annex C (Informative) Methodology: equipment with Type of Protection “b” .. 59 
Annex D (Informative) Approach to assign the required ignition protection type
used for equipment to achieve different EPL ... 60 
Annex E (Informative) Information on functional safety concept ... 62 
Bibliography ... 64 
Foreword
This document has been drafted in accordance with the rules given in GB/T 1.1-
2020, "Directives for standardization - Part 1: Rules for the structure and
drafting of standardizing documents".
This document is part 29 of GB/T 3836 "Explosive atmospheres". The following
parts have been released for GB/T 3836:
-- Part 1: Equipment - General requirements;
-- Part 2: Equipment protection by flameproof enclosures “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 standard replaces GB 25286.5-2010 Non-electrical equipment for use in
potentially explosive atmospheres - Part 5: Protection by constructional safety
“c”, GB 25286.6-2010 Non-electrical equipment for use in potentially explosive
atmospheres - Part 6: Protection by control of ignition source “b” and GB
25286.8-2010 Non-electrical equipment for potentially explosive atmospheres -
Part 8: Protection by liquid immersion “k”. This standard integrates the main
contents of GB 25286.5-2010, GB 25286.6-2010, and GB 25286.8-2010.
Compared with GB 25286.5-2010, GB 25286.6-2010, and GB 25286.8-2010,
in addition to structural adjustments and editorial changes, the main technical
changes are as follows:
-- Change the application of protection by control of ignition source “b” (see
6.5.3; 8.3 of GB 25286.6-2010);
-- Add the document requirements for constructional safety “c” and protection
by control of ignition source “b” (see 9.1, 9.2);
-- Change the marking requirements (see Clause 10; Clause 12 of GB
25286.5-2010, Clause 11 of GB 25286.6-2010, Clause 10 of GB 25286.8-
2010).
This standard uses the redrafting method to modify and adopt ISO 80079-
37:2016 Explosive atmospheres - Part 37: Non-electrical equipment for
explosive atmospheres - Non-electrical type of protection constructional safety
“c”, control of ignition source “b”, liquid immersion “k”.
The technical differences between this document and ISO 80079-37:2016 an...