ДСТУ EN 60079-2:2017 Вибухонебезпечні середовища. Частина 2. Електрообладнання. Вид вибухозахисту: оболонка під підвищеним тиском р (EN 60079-2:2014, IDT)

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EN 60079-2:2014

Explosive atmospheres — Part 2: Equipment protection by pressurized enclosure «р»

прийнято як національний стандарт
методом «підтвердження» за позначенням
Відповідає офіційному тексту

ДСТУ EN 60079-2:2017
(EN 60079-2:2014, IDT)

Вибухонебезпечні середовища. Частина 2. Електрообладнання.
Вид вибухозахисту: оболонка під підвищеним тиском «р»

З наданням чинності від 2017-07-26

CONTENTS

INTRODUCTION

1 Scope

2 Normative references

3 Terms and definitions

4 Protection levels

5 Constructional requirements for pressurized enclosures

5.1 Enclosure

5.2 Materials

5.3 Doors and covers

5.3.1 Group I pressurized enclosures

5.3.2 Group I pressurized enclosures with static pressurization

5.3.3 Group II and Group III pressurized enclosures

5.3.4 Group II and Group III pressurized enclosures with static pressurization

5.3.5 Group II and Group III Level of Protection УpxbФ

5.3.6 Group II and Group III Door and Cover warning

5.4 Mechanical strength

5.5 Group I and Group II Apertures, partitions, compartments and internal components

5.6 Apertures for Static Pressurization

5.7 Insulating materials for Group I equipment

5.8 Sealing

5.9 Spark and particle barriers

5.10 Cells and batteries

6 Temperature limits

6.1 General

6.2 For Level of Protection УpxbФ or Level of Protection УpybФ

6.3 For Level of Protection УpzcФ

Safety provisions and safety devices (except for static pressurization)

7.1 Suitability of safety devices for hazardous area

7.2 Integrity of safety devices

7.3 Provider of safety devices

7.4 Pressurization System evaluated as associated equipment

7.4.1 Pressurization systems for Level of Protection ФpzcФ

7.4.2 Pressurization systems for Level of Protection ФpybФ

7.4.3 Pressurization systems for Level of Protection ФpxbФ

7.5 Sequence diagram for Level of Protection УpxbФ

7.6 Ratings for safety devices

7.7 Group I and Group II Purging automated for Level of Protection УpxbФ

7.8 Group I or Group II ? Purging criteria

7.9 Group III Ц Cleaning

7.10 Requirements when a minimum flow rate required

7.11 Safety devices to detect minimum overpressure

7.12 Value of minimum overpressure

7.13 Pressurizing multiple enclosures

7.14 Safety devices on doors and covers

7.15 Equipment that may remain energized

7.16 Equipment permitted within Level of Protection УpybФ

8 Safety provisions and safety devices for static pressurization

8.1 Suitability of safety devices for hazardous area

8.2 Protective gas

8.3 Internal sources of release

8.4 Group I and Group II Filling procedure

8.5 Group III Filling Procedure

8.6 Safety devices

8.7 Equipment that may remain energized

8.8 Overpressure

9 Supply of protective gas

9.1 Backup supply

9.2 Independent supplies

9.3 Type of gas

9.4 Temperature

10 Pressurized equipment with an internal source of release

11 Release conditions

11.1 No release

11.2 Limited release of a gas or vapour

11.3 Limited release of a liquid

12 Design requirements for the containment system

12.1 General design requirements

12.2 Infallible containment system

12.3 Containment system with a limited release

13 Protective gas and pressurizing techniques when there is an internal source of release

13.1 General

13.2 Pressurization with leakage compensation

13.2.1 No release

13.2.2 Limited release of a gas or liquid

13.3 Pressurization with dilution

13.3.1 General

13.3.2 No release

13.3.3 Limited release of a gas or vapour

13.3.4 Limited release of a liquid

14 Ignition-capable equipment

15 Internal hot surfaces

16 Type verification and tests

16.1 Determining the maximum overpressure rating

16.2 Maximum overpressure test

16.3 Leakage test

16.3.1 Other than static pressurization

16.3.2 Static pressurization

16.4 Purging test for pressurized enclosures with no internal source of release and filling procedure test for static pressurization

16.4.1 General

16.4.2 Pressurized enclosure where the protective gas is air

16.4.3 Pressurized enclosure where the protective gas is inert

16.4.4 Pressurized enclosure where the protective gas may be either air or an inert gas with a density equal to air ±10 %

16.4.5 Filling procedure test for a pressurized enclosure protected by static pressurization

16.5 Purging and dilution tests for a pressurized enclosure with an internal source of release

16.5.1 Test gas

16.5.2 Pressurized enclosure where the flammable substance has less than 2 % (V/V) oxygen and the protective gas is inert

16.5.3 Pressurized enclosure with pressurization by continuous flow, containment system with less than 21 % (V/V) oxygen and the protective gas is inert

16.5.4 Pressurized enclosure where the flammable substance is not a liquid, pressurization by continuous flow and the protective gas is air

16.6 Verification of minimum overpressure

16.7 Tests for an infallible containment system

16.7.1 Overpressure test

16.7.2 Infallibility test

16.8 Overpressure test for a containment system with a limited release

17 Routine tests

17.1 Functional test

17.2 Leakage test

17.3 Tests for an infallible containment system

17.4 Test for a containment system with a limited release

18 Marking

18.1 General

18.2 Identifying as pressurized

18.3 Supplementary marking

18.4 Internal source of release

18.5 Static pressurization

18.6 Pressurization systems

18.7 Warnings required in other clauses

18.8 Overpressure limited by user

18.9 Inert gas

19 Instructions

Annex A (normative) Purging and dilution tests

A.1 General

A.2 Criteria for compliance where the protective gas is air

A.3 Criteria for compliance where the protective gas is inert

Annex B (informative) Examples of functional sequence diagram

Annex C (informative) Examples of the changes in pressure in ducts and enclosures

Annex D (informative) Information to be provided to the user

D.1 General

D.2 Ducting of protective gas

D.2.1 Location of inlet

D.2.2 Ducting between pressurized enclosure and inlet

D.2.3 Outlets for protective gas

D.2.4 Additional purge time to account for ducting

D.2.5 Temperature of protective gas at the inlet

D.3 Power for protective gas supply

D.4 Static pressurization

D.5 Enclosures with a containment system

D.6 Enclosure maximum overpressure

Annex E (normative) Classification of the type of release within enclosures

E.1 General

E.2 No normal release, no abnormal release

E.3 No normal release, limited abnormal release

E.4 Limited normal release

Annex F (informative) Examples for the use of the dilution area concept

Annex G (normative) Internal Cells and Batteries for Level of Protection УpxbФ and Level of Protection УpybФ

G.1 General Requirements

G.1.1 General

G.1.2 Accepted Electrochemical Systems

G.1.3 Secondary cells and secondary batteries

G.1.4 Mechanical Protection

G.2 Electrical Protection by energy limiting circuits

G.2.1 Assessing as energy limited

G.2.2 Protective Components

G.2.3 Preventing excessive gas pressure

G.3 Additional requirements for Primary batteries

G.3.1 Prevention of reverse charging

G.3.2 Prevention of accidental charging of primary batteries

G.4 Additional requirements for secondary batteries

G.4.1 Charging of secondary batteries inside the pressurized housing

G.5 Specific requirements for Inherently Safe (IhS) cells and batteries

G.6 Equipment located inside a pressurized enclosure connected to a battery which is also located inside the pressurized enclosure and not disconnected in the event of loss of pressurization

G.6.1 General

G.6.2 Circuit Isolation

G.6.3 Intrinsically safe battery or inherently safe battery used with УExФ equipment

G.6.4 Intrinsically Safe or Inherently Safe battery with non-"Ex" equipment

G.7 Supplementary marking and constructional requirements for pressurized enclosures containing one or more cells or batteries

G.7.1 General

G.7.2 Battery removal warning

G.7.3 Batteries requiring routine maintenance

G.8 Type tests

G.8.1 Voltage

G.8.2 Short circuit test for an Inherently Safe Cell or Battery

G.8.3 Full load test for other than Inherently safe batteries

Annex H (normative) Internal Cells and Batteries for Level of Protection УpzcФ

H.1 General Requirements

H.1.1 General

H.1.2 Accepted Electrochemical Systems

H.1.3 Secondary cells and secondary batteries

H.1.4 Mechanical Protection

H.2 Equipment located inside a pressurized enclosure connected to a battery which is also located inside the pressurized enclosure and is not disconnected when power is removed from the enclosure

H.3 Supplementary marking and constructional requirements for pressurized enclosures containing one or more cells or batteries

H.3.1 General

H.3.2 Battery removal warning

H.3.3 Batteries requiring routine maintenance

Bibliography