4.2
Selection of the cleaning parameters according to TRGS 727:2016
For the information, GEA Tuchenhagen GmbH assumes no responsibility. If there
is a risk of explosion due to the use of cleaners, all current ATEX relevant
standards and regulations must always be applied.
Hint!
The accumulation of liquid in the container during cleaning should be
avoided.
Hint!
Low-conductivity liquids, such as hydrocarbons, are less charged
during spraying than water because they contain only a small
concentration of dissociated ions.
4.2.1
Cleaning with water jets with pressures of up to 12 bar
When cleaning with water jets up to 12 bar and with up to 20 nozzles, no
dangerous charges are to be expected as long as the liquid flow rate does not
exceed 7 l/s and the tank volume does not exceed 10 m
3
.
4.2.2
Clean with solvents of low and medium conductivity from pressures up to 12 bar
•
If cleaning liquids of low and medium conductivity, e.g. organic solvents, are
used, the proportion of a second phase, e.g. water or solid, may not exceed
1%.
•
Cleaning agents may only be run in a closed circuit if the impurities are kept
below 1%.
4.2.3
Cleaning with water jets with pressures over 12 bar
When cleaning metallic tanks covered with hydrocarbons with water jets,
hazardous charges are not to be expected, as long as the working pressure falls
below 500 bar, the liquid throughput is less than 5 l/s and the container diameter
does not exceed 3 m.
4.2.4
Clean with solvents of medium conductivity from pressures over 12 bar
•
When cleaning metallic containers with solvents of medium conductivity from
pressures over 12 bar, hazardous charges are not to be expected as long as
the working pressure remains below 50 bar, the liquid throughput is less than
1 l/s and the container diameter does not exceed 3 m.
•
The cleaning liquids must not contain more than 1% liquid or solid
components which could form a second phase. They must be drained during
cleaning.
Cleaning
Selection of the cleaning parameters according to TRGS 727:2016
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