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eLibrary > BS EN 60079-1:2014 Explosive atmospheres - Equipment protection by flameproof enclosures \\\"d\\\" >

BS EN 60079-1:2014 Explosive atmospheres - Equipment protection by flameproof enclosures \\\"d\\\", 2018

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BS EN 60079-1:2014 Explosive atmospheres - Equipment protection by flameproof enclosures \\\"d\\\", 2018

undefined
English [Go to Page]
CONTENTS
FOREWORD
Explanations:
1 Scope
2 Normative references
3 Terms and definitions
4 Level of protection (equipment protection level, EPL) [Go to Page]
4.1 General
4.2 Requirements for level of protection “da”
4.3 Requirements for level of protection “db”
4.4 Requirements for level of protection “dc” [Go to Page]
4.4.1 General
4.4.2 Construction of “dc” devices
4.4.3 Tests for “dc” devices
Tables [Go to Page]
Table 1 – Number of non-transmission tests for level of protection “da”
5 Flameproof joints [Go to Page]
5.1 General requirements
5.2 Non-threaded joints [Go to Page]
5.2.1 Width of joints (L)
5.2.2 Gap (i)
5.2.3 Spigot joints
Figures [Go to Page]
Figure 1 – Example of construction for indirect checking of a flanged Group I flameproof joint [Go to Page]
5.2.4 Holes in joint surfaces
Figure 2 – Spigot joints
Figure 3 – Holes in surfaces of flanged joints, example 1
Figure 4 – Holes in surfaces of flanged joints, example 2
Figure 5 – Holes in surfaces of flanged joints, example 3
Figure 6 – Holes in surfacesof spigot joints, example 1 [Go to Page]
5.2.5 Conical joints
5.2.6 Joints with partial cylindrical surfaces (not permitted for Group IIC)
Figure 7 – Holes in surfacesof spigot joints, example 2
Figure 8 – Holes in surfacesof spigot joints, example 3 [Go to Page]
5.2.7 Flanged joints for acetylene atmospheres
5.2.8 Serrated joints
Figure 9 – Examples of joint constructions [Go to Page]
5.2.9 Multi-step joints
Table 2 – Minimum width of joint and maximum gap for enclosures of Groups I, IIA and IIB
Table 3 – Minimum width of joint and maximum gap for Group IIC enclosures
5.3 Threaded joints
5.4 Gaskets (including O-rings)
Table 4 – Cylindrical threaded joints
Table 5 – Taper threaded joints a, c
Figure 10 – Illustration of therequirements concerning gaskets –Example 1
Figure 11 – Illustration of therequirements concerning gaskets –Example 2
Figure 12 – Illustration of therequirements concerning gaskets –Example 3
Figure 13 – Illustration of therequirements concerning gaskets –Example 4
Figure 14 – Illustration of therequirements concerning gaskets –Example 5
Figure 15 – Illustration of therequirements concerning gaskets –Example 6
5.5 Equipment using capillaries
6 Sealed joints [Go to Page]
6.1 Cemented joints [Go to Page]
6.1.1 General
6.1.2 Mechanical strength
Figure 16 – Illustration of the requirements concerning gaskets – Example 7 [Go to Page]
6.1.3 Width of cemented joints
6.2 Fused glass joints [Go to Page]
6.2.1 General
6.2.2 Width of fused glass joints
7 Operating rods
8 Supplementary requirements for shafts and bearings [Go to Page]
8.1 Joints of shafts [Go to Page]
8.1.1 General
8.1.2 Cylindrical joints
8.1.3 Labyrinth joints
8.1.4 Joints with floating glands
Figure 17 – Example of cylindrical joint for shaft of rotating electrical machine
Figure 18 – Example of labyrinth joint for shaft of rotating electrical machine
Figure 19 – Example of joint with floating gland for shaft of rotating electrical machine
8.2 Bearings [Go to Page]
8.2.1 Sleeve bearings
8.2.2 Rolling-element bearings
9 Light-transmitting parts [Go to Page]
Figure 20 – Joints of shaft glands of rotating electrical machines
10 Breathing and draining devices which form part of a flameproof enclosure [Go to Page]
10.1 General
10.2 Openings for breathing or draining
10.3 Composition limits
10.4 Dimensions
10.5 Elements with measurable paths
10.6 Elements with non-measurable paths
10.7 Removable devices [Go to Page]
10.7.1 General
10.7.2 Mounting arrangements of the elements
10.8 Mechanical strength
10.9 Breathing devices and draining devices when used as Ex components [Go to Page]
10.9.1 General
10.9.2 Mounting arrangements of the elements and components
10.9.3 Type tests for breathing and draining devices used as Ex components
Figure 21 – Component test rig for breathing and draining devices [Go to Page]
10.9.4 Ex component certificate
11 Fasteners and openings
12 Materials
13 Entries for flameproof enclosures [Go to Page]
13.1 General
13.2 Threaded holes
13.3 Non-threaded holes (for Group I only)
13.4 Cable glands
13.5 Conduit sealing devices
Figure 22 – Example of possible documentation
13.6 Plugs and sockets and cable couplers
13.7 Bushings
13.8 Blanking elements
14 Verification and tests
15 Type tests [Go to Page]
15.1 General
Table 6 – Conditions for the determination of maximum surface temperature
15.2 Tests of ability of the enclosure to withstand pressure [Go to Page]
15.2.1 General
15.2.2 Determination of explosion pressure (reference pressure)
Table 7 – Test factors for reduced ambient conditions
Figure 23 – Example of a regular shaped waveform
Figure 24 – Example of an irregular shaped waveform [Go to Page]
15.2.3 Overpressure test
Table 8 – Relative pressures for small equipment
15.3 Test for non-transmission of an internal ignition [Go to Page]
15.3.1 General
Table 9 – Reduction in length of a threaded joint for non-transmission test
Table 10 – Test factors to increase pressure or test gap (iE)
Table 11 – Minimum distance of obstructions from flameproof “d” flange openings [Go to Page]
15.3.2 Electrical equipment of Groups I, IIA and IIB
Table 12 – Gas/air mixtures [Go to Page]
15.3.3 Electrical equipment of Group lIC
15.4 Tests of flameproof enclosures with breathing and draining devices [Go to Page]
15.4.1 General
15.4.2 Tests of ability of the enclosure to withstand pressure
15.4.3 Thermal tests
15.4.4 Test for non-transmission of an internal ignition
15.5 Tests for “dc” devices [Go to Page]
15.5.1 General
15.5.2 Preparation of “dc” samples
15.5.3 Test conditions for “dc” devices
16 Routine tests [Go to Page]
16.1 General
Table 13 – Static pressures
16.2 Enclosures not incorporating a welded construction
16.3 Enclosures incorporating a welded construction
16.4 Bushings not specific to one flameproof enclosure
16.5 Acceptance criteria
16.6 Batch testing
17 Switchgear for Group I [Go to Page]
17.1 General
17.2 Means of isolation [Go to Page]
17.2.1 General
17.3 Doors or covers [Go to Page]
17.3.1 Quick-acting doors or covers
17.3.2 Doors or covers fixed by screws
17.3.3 Threaded doors or covers
18 Lampholders and Iamp caps [Go to Page]
18.1 General
18.2 Device preventing lamps working loose
18.3 Holders and caps for lamps with cylindrical caps
18.4 Holders for lamps with threaded caps
19 Non-metallic enclosures and non-metallic parts of enclosures [Go to Page]
19.1 General
19.2 Resistance to tracking and creepage distances on internal surfaces of the enclosure walls
19.3 Requirements for type tests
19.4 Test of erosion by flame
20 Marking [Go to Page]
20.1 General
20.2 Caution and warning markings
20.3 Informative markings
21 Instructions [Go to Page]
Table 14 – Text of caution or warning markings
Table 15 – Text of informative markings
Annex A (normative) Additional requirements for crimped ribbon elements and multiple screen elements of breathing and draining devices
Annex B (normative) Additional requirements for elements, with non-measurable paths of breathing and draining devices [Go to Page]
B.1 Sintered metal elements
B.2 Pressed metal wire elements
B.3 Metal foam elements
Annex C (normative) Additional requirements for flameproof entry devices [Go to Page]
C.1 General
C.2 Constructional requirements [Go to Page]
C.2.1 Sealing methods
C.2.2 Flameproof joints
C.2.3 Constructional requirements for Ex blanking elements
Figure C.1 – Examples of blanking elements for unused entries [Go to Page]
C.2.4 Constructional requirements for Ex thread adapters
C.3 Type tests [Go to Page]
C.3.1 Sealing test
C.3.2 Test of mechanical strength
Figure C.2 – Device for the sealing tests for cable glands [Go to Page]
C.3.3 Type tests for Ex blanking elements
C.3.4 Type tests for Ex thread adapters
Table C.1 – Tightening torque values, metric
Figure C.3 – Examples of Ex thread adapters
Table C.2 – Tightening torque values, NPT
Annex D (normative) Empty flameproof enclosures as Ex components [Go to Page]
D.1 General
D.2 Introductory remarks
D.3 Ex component enclosure requirements
D.4 Utilization of an Ex component enclosure certificate to prepare an equipment certificate [Go to Page]
D.4.1 Procedure
D.4.2 Application of the schedule of limitations
Annex E (normative) Cells and batteries used in flameproof “d” enclosures [Go to Page]
E.1 Introductory remarks
E.2 Acceptable electrochemical systems
Table E.1 – Acceptable primary cells
E.3 General requirements for cells (or batteries) inside flameproof enclosures
E.4 Arrangement of safety devices [Go to Page]
E.4.1 Prevention of excessive temperature and cell damage
Table E.2 – Acceptable secondary cells [Go to Page]
E.4.2 Prevention of cell polarity reversal or reverse charging by another cell in the same battery
E.4.3 Prevention of inadvertent charging of a battery by other voltage sources in the enclosure
Figure E.1 – Fitting of diode arrangement for three cells in series
E.5 Recharging of secondary cells inside flameproof enclosures
Figure E.2 – Fitting of blocking diodes to meet E.4.3 (third example)
E.6 Rating of protection diodes and reliability of protection devices
Annex F (informative) Mechanical properties for screws and nuts [Go to Page]
Table F.1 – Mechanical properties for screws and nuts
Annex G (normative) Additional requirements for flameproof enclosures withan internal source of release (containment system) [Go to Page]
G.1 General
G.2 Release conditions [Go to Page]
G.2.1 No release
Figure G.1 – Flameproof enclosure with containment system [Go to Page]
G.2.2 Limited release of a gas or vapour
G.2.3 Limited release of a liquid
G.3 Design requirements for the containment system [Go to Page]
G.3.1 General design requirements
G.3.2 Infallible containment system
G.3.3 Containment system with a limited release
G.4 Type tests for the containment system [Go to Page]
G.4.1 Overpressure test
G.4.2 Leakage test for an infallible containment system
G.4.3 Leakage test for a containment system with a limited release
Annex H (normative)Requirements for machines with flameproof “d” enclosures fed from converters [Go to Page]
H.1 General
H.2 Construction requirements for bearings
H.3 Temperature requirements
Bibliography [Go to Page]

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BS EN 60079-1:2014 Explosive atmospheres - Equipment protection by flameproof enclosures \\\"d\\\", 2018

⨯To continue with accurate pricing,
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