Installation and Commissioning
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Manual TRZ 04 · EN04 · February, 1st 2017
8
1.1.5
Risk assessment and mitigation
The TRZ04 subjects to risks in its use, which were judged by qualified staff of the company
RMG. Risks may arise due to high pressures, more rarely by too low. Even work outside
the permissible temperature range can lead to danger. Invalid current and voltage values
can trigger explosions in hazardous areas.
The risk assessment assumes that when installing or removing a turbine a draining and
venting of the pipeline takes place. Thus, and only then no explosive gas mixture is in the
pipeline.
Of course (chapter 1.1.4.4
Specialized knowledge required
) only work by trained
personnel are permitted, which is also trained to know proper tools and use only this.
These risks have been considered during the development phase and action were taken to
minimize these risks.
Risk mitigation measures:
- All pressurized parts are designed in accordance to AD 2000 regulations, PED
Annex 1
- The complete design being pressurized is verified by the TÜV Hessen
- All pressurized parts are made with material certificate; there is a traceability to the
batch tracking of all pressurized parts
- The mechanical properties of all relevant pressurized components are checked by
tensile testing, impact testing and hardness testing
- In addition, non-destructive testing were applied: X-ray and ultrasonic testing of the
meter housing for defects in material, surface crack detection by magnetic particle
and dye-penetration
- With pressure tests 1.5 times of the intended operating pressure the strength of the
components were verified; leak test were carried out at 1.1 times of the intended
operating pressure. Successful tests were marked
-
The maximum operating pressure is stated on the nameplate of the device, as well
as the temperature range. Operation of the device is only permitted within the
indicated ranges.
Introduction
