GB/T 3836.13-2021 Explosive atmospheres—Part 13: Equipment repair, overhaul, reclamation and modification English
Explosive atmospheres - Part 13: Equipment repair, overhaul, reclamation and modification
1 Scope
This document gives instructions, principally of a technical nature, on the repair, overhaul, reclamation and modification of Ex equipment designed for use in explosive atmospheres.
This document is applicable to the repair, overhaul, reclamation and modification of Ex equipment in order to mitigate deficiencies identified during operation, inspection and maintenance.
This document does not give advice on cable and wiring systems which can require a renewal when the equipment is re-installed.
This document is not applicable to type of protection "m".
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 3836.1 Explosive atmospheres - Part 1: Equipment - General (GB/T 3836.1-2021, IEC 60079-0: 2017, MOD)
GB/T 3836.2 Explosive atmospheres - Part 2: Equipment protection by flameproof enclosures "d" (GB/T 3836.2-2021, IEC 60079-1: 2014, 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 3836.6 Explosive atmospheres - Part 6: Equipment protection by liquid immersion "o" (GB/T 3836.6-2017, IEC 60079-6: 2015, 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 3836.15 Explosive atmospheres - Part 15: Electrical installations design, selection and erection (GB/T 3836.15-2017, IEC 60079-14: 2007, MOD)
GB 3836.20 Explosive atmospheres - Part 20: Equipment with equipment protection level (EPL) Ga (GB 3836.20-2010, IEC 60079-26: 2006, IDT)
GB/T 4208 Degrees of protection provided by enclosure (IP code) (GB/T 4208-2017, IEC 60529: 2013, IDT)
GB/T 19518.1 Explosive atmospheres - Electrical resistance traces heating - Part 1: General and testing requirements (GB/T 19518.1-2017, IEC 60079-30-1: 2007, MOD)
GB/T 19518.2 Explosive atmospheres - Electrical resistance traces heating - Part 2: Application guide for design, installation and maintenance (GB/T 19518.2-2017, IEC 60079-30-2: 2007, MOD)
GB/T 21205 Rotating electrical machines - Repair, overhaul and reclamation (GB/T 21205-2007, IEC 60034-23: 2003, IDT)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 3836.1 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
——IEC: http://www.electropedia.org/;
——ISO: http://www.iso.org/obp.
Note: Additional definitions applicable to explosive atmospheres can be found in GB/T 2900.35.
3.1
alteration
change to a product that results in an alternative construction that is described in the certificate documentation
3.2
certificate
document used to determine whether the equipment meets the requirements of standards, type tests, and routine tests for adaptation The certificate may be for an Ex equipment or an Ex component.
3.2.1
Ex component certificate
certificate prepared for an Ex component
3.2.2
Ex equipment certificate
certificate prepared for Ex equipment
3.2.3
schedule drawing
drawing or document listed in the certificate or test report
3.3
competence
ability to apply knowledge and skills to achieve intended results
3.4
component part
indivisible item
Note: Normally an assembly of components constitutes an equipment.
3.5
copy winding
process by which a winding is totally or partially replaced by another, the characteristics and properties of which are at least as good as those of the original
3.6
encapsulation "m"
type of protection whereby parts that are capable of igniting an explosive atmosphere by either sparking or heating are fully enclosed in a compound or other non-metallic enclosure with adhesion in such a way as to avoid ignition of a dust layer or explosive atmosphere under operating or installation conditions
3.7
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
3.8
increased safety "e"
type of protection applied to electrical equipment in which additional measures are applied so as to give increased security against the possibility of excessive temperatures and against the occurrence of arcs and sparks in normal service or under specific abnormal conditions
3.9
intrinsically safe circuit
circuit, in which any spark or any thermal effect produced in the conditions specified in GB/T 3836.4, including normal operation and specified fault conditions, is not capable of causing ignition of a given explosive atmosphere
Foreword i
Introduction vi
1 Scope
2 Normative references
3 Terms and definitions
4 General
4.1 General principles
4.2 Instructions for the user
4.3 Instructions for the repair facility
5 Additional requirements for the repair and overhaul of equipment with flameproof type "d"
5.1 Application
5.2 Repair and overhaul
5.3 Reclamation
5.4 Alterations and modifications
6 Additional requirements for the repair and overhaul of equipment with type of protection "i"
6.1 Application
6.2 Repair and overhaul
6.3 Reclamation
6.4 Modifications
7 Additional requirements for the repair and overhaul of equipment with pressurization "p"
7.1 Application
7.2 Repair and overhaul
7.3 Reclamation
7.4 Alterations and modifications
7.5 Pressurization system
8 Additional requirements for the repair and overhaul of equipment with increased safety "e"
8.1 Application
8.2 Repair and overhaul
8.3 Reclamation
8.4 Alterations and modifications
9 Additional requirements for the repair and overhaul of equipment with type of protection "n"
9.1 Application
9.2 Repair and overhaul
9.3 Reclamation
9.4 Alterations and modifications
10 Additional requirements for the repair and overhaul of equipment covered by GB 3836.20
11 Additional requirements for the repair and overhaul of equipment with type of protection "t" (formerly "tD" or DIP)
11.1 Application
11.2 Repair and overhaul
11.3 Reclamation
11.4 Alterations and modifications
12 Requirements for the repair and overhaul of equipment with type of protection liquid immersion "o"
12.1 Application
12.2 Repair and overhaul
12.3 Reclamation
12.4 Modifications
13 Requirements for the repair and overhaul of equipment with type of protection powder filling "q"
13.1 Application
13.2 Repair and overhaul
13.3 Reclamation
13.4 Modifications
14 Requirements for the repair and overhaul of equipment with type of protection "s" (special protection)
15 Requirements for the repair and overhaul of electrical resistance trace heating equipment
Annex A (Normative) Knowledge, skills and competence of responsible persons and operatives
Annex B (Normative) Identification of repaired equipment by marking
Annex C (Informative) Additional requirements relating to Ex control equipment
Annex D (Normative) Requirements for measurements in flameproof equipment during overhaul, repair and reclamation (including guidance on tolerances)
Annex E (Informative) Evaluation of best practice during rewinding and repair
Bibliography
