Evaluation of the risk of ignition
based on DIN EN ISO 80079-36:2016-12
PROCEDURE NUMBER
--- (cross-project)
MANUFACTURER
TEKA Absaug- und Entsorgungstechnologie GmbH
Millenkamp 9
D-48653 Coesfeld
DEVICE TYPE
WNA-AL
DEVICE GROUP
II
DEVICE DESCRIPTION
The construction and intended use of the device are described in separate documentation (see Operating Instructions)
1
2
3
4
RISK OF IGNITION
EVALUATION OF FREQUENCY OF OCCURRENCE WITH
NO ADDITIONAL MEASURES EMPLOYED
MEASURES EMPLOYED TO PREVENT EMERGENCE
FREQUENCY OF OCCURRENCE INCLUDING
MEASURES
a
b
a
b
c
d
e
a
b
c
a
b
c
d
e
f
Seq. No.
POTENTIAL IGNITION
SOURCE
CAUSE
(Under what
circumstances does the
risk of ignition occur?)
IN NORM
A
L OPE
RA
TI
ON
W
H
EN M
A
LF
UNC
TI
ON E
XPE
CT
ED
ON I
NF
RE
QUE
N
T M
A
LF
UNC
TI
ON
NO
T
TO BE
T
A
KE
N I
N
TO A
CCOUN
T
REASON
DESCRIPTION
BASIS
(standards,
technical
regulations,
experimental
results)
PROOF
(incl. the relevant
properties listed in
column 1)
IN NORM
A
L OPE
RA
TI
ON
W
H
EN M
A
LF
UNC
TI
ON E
XPE
CT
ED
ON I
NF
RE
QUE
N
T M
A
LF
UNC
TI
ON
NO
T
TO BE
T
A
KE
N I
N
TO A
CCOUN
T
RE
SUL
TI
NG D
EV
ICE
CA
TE
GOR
Y as p
er
RL
20
14
/3
4/
EU F
OR
TH
IS
IGNI
TI
ON
SOURCE
NE
CE
SS
A
RY RE
ST
RI
CT
IONS
6
Electrical equipment
Magnet valves for
automatic water supply
x
Magnet valves are a possible
source of ignition
Magnet valves are located outside of a
zone
- TRGS 723 5.5
Operating
Instructions, section
"ATEX zoning"
x
Da, Ga
7
Stray currents, cathodic
corrosion protection
Return currents, lightning
strike, earth fault
x
External sources can result in
compensating currents that
may cause ignition.
All system components are earthed and
integrated in the equipotential earthing.
- TRGS 723 5.6.2
- DIN EN 80079-36
6.6.2
Confirm earthing
measures in
earthing report
x
Da, Ga
8
Lightning strike
Lightning strike at or near
the installation
x
Electrical charge or surfaces
heated by lightning strike
Lightning protection measures are not
required if explosive mixes occur only
rarely and for short periods (zone 2/22)
because the probability of lightning
occurring at the same time as the
formation of a hazardous explosive
atmosphere can be considered negligible.
- TRGS 723 5.8
- DIN EN 62305-1
Technical
regulations
x
Da, Ga
9
Static electricity
Isolated electrically
conductive parts
x
Isolated conductive parts form
a capacitor, e.g. through contact
with statically charged dust
All system components are earthed and
integrated in the equipotential earthing.
- DIN EN 80079-36
6.7.2
Confirm earthing
measures in
earthing report
x
Da, Ga
10
Static electricity
Spark discharge due to
charging of coated
housing parts
x
Accumulations of
dust/hydrogen at internal
housing parts
All system components are earthed and
integrated in the equipotential earthing.
Hydrogen can escape due to the design.
- DIN EN 80079-36
6.7.2
Confirm earthing
measures in
earthing report
x
Da, Ga
11
Static electricity
Static discharge from a
person while operating the
system
x
Discharge from a person due to
non-conductive footwear/work
clothing
Note in Operating Instructions.
- TRGS 727 7
Operating
instructions, section
"Cleaning the mud
container"
x
Da, Ga