Medium-consistency pump MC
STANDARD, C-01-000000
Rev. 0, 2010.02.09 SAFETY Kap.2 , Seite 17 of 20
GRZ-2698567-v1-Safety.FM
2.18 Work in enclosed vessels and in confined spaces
Definition All operating equipment that is closed off towards the surrounding
atmosphere is considered an enclosed vessel. This includes shafts,
channels, pipework and cavities in machines.
Procedure If there‘s delivered a standpipe with a manhole --> D= 600mm
To ensure that the lid can not be opened with pulp in the standpipe,
opening will only be possible inwards.
Specimen permit to enter an enclosed vessel, see section 2.19
Emptying and
cleaning
The enclosed vessel must be disconnected effectively from all pipes
leading to and from it.
Possible cleaning methods:
• Flushing out
• Steaming out
• Using high-pressure cleaning equipment.
If high-pressure cleaning equipment is used in a potentially explosive
atmosphere, the cleaning lance must always be made of non-sparking
material.
The enclosed vessel should only be cleaned mechanically in exceptional
cases as this work requires someone to enter the vessel.
Step Procedure
1
The safety measures must be defined in writing before
beginning any work.
The safety measures must be defined by a competent expert
in this field.
2
Permit to enter an enclosed vessel, to be issued by a
supervisor who is present at all times.
This supervisor must check personally that the measures
defined in writing are implemented and thus, that it is safe to
enter the enclosed vessel.
3
Permanent supervisor available for rescue measures.
There must always be someone present who is well versed in
the required protective and safety measures. This person
must be capable of rescuing whoever is inside the enclosed
vessel or of fetching help without actually leaving the place of
the incident.
4
Approval for re-start to be given by permanent
supervisor.
Tab. 2-5 Working in enclosed vessels - procedure
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