EN non sparking tools

NON SPARKING TOOLS
Explosion protection after ATEX = ATmosphere EXplosible
Directive 137 (also known as directive 99/92) determines that the end user (employer) is responsible for the safety of the employees working
(installing, operating or maintaining equipment) in a potentially explosive atmosphere.
The directive has been in force since July 2003.
Classification of the zones by explosion risks
ATEX
Feasibility
high average-low very low
Gases
ZONE 0
is an area, in which dangerous
atmosphere capable of explosion
as a mixture from air and combustible
gases, damping or fogs
exists constantly, for long time or
frequently. The notion „frequently“
is to be used for means of „
temporally mainly „, which means
that explosion-endangered areas
are to be assigned zone 0, if the
atmosphere is capable of explosion
for more than 50% during the
working duration of an arrangement.
Actually, this is only inside
tubes and reservoirs the case.
ZONE 1
is an area in which at normal
working duration, occasionally a
dangerous atmosphere is capable
of explosion as a mixture from air
and combustible gases, damping
or fogs. If the existence of
atmosphere capable of explosion
comes to a duration of approximately
30 minutes per year or this
appears occasionally, e.g. daily,
however, it is smaller than 50% of
the activity duration of the arrangement,
zone 1 applies according
to general opinion.
ZONE 2
is an area in which at normal working duration,
occasionally a dangerous atmosphere
is capable of explosion as a mixture from
air and combustible gas, damping or fogs.
Among a number of experts the general
consensus consists the fact that the
notion corresponds „briefly“ to a duration
of approximately 30 minutes per year.
Furthermore it is stated that atmosphere
capable of explosion is not to be expected
at normal activity usually. If atmosphere
capable of explosion already appears once
a year briefly, the affected area should be
already classified in zone 2.
Dust
ZONE 20
is an area in which dangerous
atmosphere, that is capable of
explosion, exists in form of a
cloud in the air which contains
combustible dust constantly, for
long time or frequently.
ZONE 21
is an area in which at normal
activity occasionally a dangerous
atmosphere capable of explosion
exists in form of a cloud in the air
which contains combustible dust.
ZONE 22
is an area in which at normal activity a
dangerous atmosphere capable of explosion
does not appear in form of a cloud in
the air which contains combustible dust
usually or, however, only briefly.
Application remarks:
• Non sparking tools are softer than usual tools.
The operation with these tools has to be carried out with accuracy and care.
Overstraining has to be prevented.
• Only using non sparking tools as a protection measure in fire endangered and explosion endangered areas is
not enough. Please consider the instructions of local health and safety regulations for the protection of employees
and accommodation.
Reworking:
• Technical marking sheets are available on request for reworking (e.g. re-sharpen).
BERYLLIUMplus
Impurity
Matarial
min in %
max in %
Technical properties
Tensile strength
Hardness
Specific weight
Magnetic characteristics
Electrical conduction
Matarial
min in %
max in %
Technical properties
Tensile strength
Yield stress
Hardness
Specific weight
Magnetic characteristics
Electrical conduction
Be
1.8
2.0
Ni+Co
0.2
0.8
0.5
800-940 Mp (average value 850 Mp)
HRC35-42
8,5 (average value)
1.0004
0,53079 S/m
BRONZEplus
Al
9.0
10.0
Ni
4.0
5.0
700-740 Mp (average value 725 Mp)
120 Mp
HRC25-32
7,5 (average value)
1.348
0,42463 S/m
Fe
4.0
5.0
Mn
0.8
2.5
Balance
Cu
Balance
Cu