GB/T 3836.34-2021Explosive atmospheres - Part 34: Equipment assemblies (English PDF)

Foreword

This document is drafted in accordance with GB/T 1.1-2020 "Directives for

standardization - Part 1: Rules for the structure and drafting of standardizing

documents".

This document is Part 34 of GB/T 3836 "Explosive atmospheres". GB/T 3836 has

issued the following parts:

- 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 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 uses the redraft law to modify and adopt IEC TS 60079-46:2017

"Explosive atmospheres - Part 46: Equipment assemblies".

The technical differences between this document and IEC TS 60079-46:2017 and their

reasons are as follows:

- As for the normative references, this document has made adjustments with

technical differences, to adapt to the technical conditions of China. The

adjustments are mainly reflected in Clause 2 "Normative references". The specific

adjustments are as follows:

 Replace IEC 60079-0 with GB/T 3836.1 which modifies and adopts the

international standard (see Clause 1, etc.);

 Replace IEC 60079-10-1 with GB 3836.14 which is identical to the

international standard (see 4.3.2);

 Replace IEC 60079-14 with GB/T 3836.15 which modifies and adopts the

international standard (see Clause 3, etc.);

 Replace ISO/IEC 80079-34 with GB/T 3836.21 which modifies and adopts the

international standard (see 4.4);

 Replace ISO 80079-36 with GB/T 3836.28 which modifies and adopts the

international standard (see Clause 1, etc.);

 Replace IEC 60079-10-2 with GB/T 3836.35 which modifies and adopts the

international standard (see 4.3.2);

 Replace IEC 60079 (all parts) and ISO 80079 (all parts) with GB/T 3836 (all

parts). See Annex A for the degree of consistency between parts;

 Delete IEC 60079-25 and move the corresponding GB/T 3836.18 to

Bibliography.

The following editorial changes have been made to this document:

- In order to be consistent with the existing standard series, change the name of this

document to "Explosive atmospheres - Part 34: Equipment assemblies";

- Add Note 3 about the equipment assembly used in underground coal mines (see

Clause 1);

- Add a note on 3.1 "Equipment assembly";

- Delete the note on 3.2 "Assembly certificate";

- Add a note about GB/T 2900.35 (see Clause 3);

- Add the Bibliography.

Attention is drawn to the possibility that some of the elements of this document may be

the subject of patent rights. The issuing authority of this document shall not be held

responsible for identifying any or all such patent rights.

This document was proposed by China Electrical Equipment Industry Association.

This document shall be under the jurisdiction of National Technical Committee 9 on

Explosion Protected Electrical Apparatus of Standardization Administration of China

(SAC/TC 9).

Drafting organizations of this document: Nanyang Explosion Protected Electrical

Explosive atmospheres - Part 34: Equipment assemblies

1 Scope

This document specifies requirements for the design, construction, assembly, testing,

inspection, marking, documenting and assessment of equipment assemblies for use in

explosive atmospheres under the responsibility of the manufacturer of the equipment

assembly.

The requirements of this document apply to individual items according to GB/T 3836

(all parts) that comprise the assembly and that have individual certificates. These

individual items are then integrated as part of the equipment assembly. Also included

are requirements to address aspects for the assembly which may be beyond the

certificates of the individual items forming the assembly.

The scope of this document includes assessment of the additional requirements for

assemblies for hazardous areas and does not include requirements for non-hazardous

areas. It is assumed that compliance with other electrical or mechanical requirements

that are applicable for non-hazardous areas will be verified by either the same or

different party in addition to the requirements of this document.

This document does not apply to:

- equipment which is covered, in its entirety, by one or more GB/T 3836 equipment

types of protection;

- pressurized rooms, "p", in accordance with GB/T 3836.17, artificial ventilation for

the protection of analyzer(s) houses in accordance with IEC TR 60079-16, and

other standards addressing specific Ex assemblies;

- installation at the end-user site under the scope of GB/T 3836.15;

- classification of the hazardous area;

- inherently explosive situations and dust from explosives or pyrophoric substances

(for example explosives manufacturing and processing);

- rooms used for medical purposes;

- electrical installations in areas where the hazard is due to flammable mist.

This document is only intended to provide validation for the initial supply of an

assembly.

Note 1: Additional guidance on the requirements for hazardous atmospheres due to hybrid mixtures

of flammable dust or flyings and flammable gas or vapour is provided in GB/T 3836.15.

Where a requirement of this document conflicts with a requirement of either GB/T

2 Normative references

The contents of the following documents, through normative references in this text,

constitute indispensable provisions of this document. Among them, for dated references,

only the edition corresponding to that date applies to this document. For undated

references, the latest edition (including all amendments) applies to this document.

GB/T 3836 (all parts) Explosive atmospheres [IEC 60079 (all parts)]

GB/T 3836.1 Explosive atmospheres - Part 1: Equipment - General requirements

(GB/T 3836.1-2021, IEC 60079-0:2017, MOD)

GB 3836.14 Explosive atmospheres - Part 14: Classification of areas - Explosive gas

atmosphere (GB 3836.14-2014, IEC 60079-10-1:2008, IDT)

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/T 3836.21 Explosive atmospheres - Part 21: Application of quality systems for

equipment manufacture (GB/T 3836.21-2017, ISO/IEC 80079-34:2011, MOD)

GB/T 3836.28 Explosive atmospheres - Part 28: Non-electrical equipment for

explosive atmospheres - Basic method and requirements (GB/T 3836.28-2021, ISO

80079-36:2016, MOD)

GB/T 3836.35 Explosive atmospheres - Part 35: Classification of areas for explosive

dust atmospheres (GB/T 3836.35-2021, IEC 60079-10-2:2015, MOD)

3 Terms and definitions

For the purposes of this document, the terms and definitions given in GB/T 3836.1,

GB/T 3836.15, and GB/T 3836.28 and the following apply.

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