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
1
Flames and hot
gases/particles
Flames/hot gases are
introduced into the raw
gas area via the pipeline
x
Process-related or error-related
occurrence at the extraction
point
- a speed of flow of > 20m/s is respected in
the line, dust deposits practically
impossible
- Flames and hot particles are extinguished
due to the water bath present in the WNA.
- The dust concentration of the dust for
extraction must always be below 50% of
the lower explosion limit (LEL).
- TRGS 723 5.3 (3)
- DIN EN 80079-36
6.3
Warning
See sections
“Connecting the
suction line and
exhaust air line” and
“ATEX operation” in
the Operating
Instructions
x
Dc, Gc
2
Mechanically generated
sparks
Mech. generated sparks
are introduced into the
raw gas area via the
pipeline
x
Process-related or error-related
occurrence at the extraction
point
- Sparks are extinguished due to the water
bath present in the WNA.
- The dust concentration of the dust for
extraction must always be below 50% of
the lower explosion limit (LEL).
- TRGS 723 5.4
- DIN EN 80079-36
6.4
Operating
Instructions, section
"ATEX operation"
x
Dc, Gc
3
Mechanically generated
sparks
Unsuitable tool when
cleaning the mud
container
x
Spark-generating tool is
possible source of ignition
Note in Operating Instructions
- TRGS 723 5.4
- DIN EN 80079-36
6.4
Operating
instructions, section
"Cleaning the mud
container"
x
Dc, Gc
4
Mechanically generated
sparks
Mech. generated sparks
due to rotating impeller
x
Gap between rotating and fixed
components too small
Check the gap size using a gauge
DIN EN 14986 4.5
Confirmation of the
gap size in the
inspection report
x
Gb
5
Electrical equipment
Hydrogen penetrates into
the bearing seals inside
the motor
x
Motor is possible source of
ignition
The motor has a corresponding explosion-
proofed design. Here Ex-II-2-G-EEx-e-II-T3
- TRGS 723 5.5
- IEC 60079-31
Suitability confirmed
by CE certification
issued by Lammers
x
Dc, Gc