Alfa Laval M line TS6, Instruction Manual

Page: 42 / 46

entrepreneur working per local legislation using proper equipment shall be
engaged.
Before the start-up of production, whenever plates or gaskets have been
removed, inserted or exchanged, it is strongly recommended to perform a
hydrostatic leakage test to confirm the internal and external sealing function of
the heat exchanger. In this test, one media side at a time must be tested with
the other side open to the ambient pressure. In a multi-pass set up, all
sections of the same side must be tested simultaneously. The recommended
test time is 10 minutes for each media side.
CAUTION
The recommended pressure for the leakage test is a pressure equal to the
operating pr 10% of the actual unit but never above the allowable
pressure (PS) as stated on the name plate.
WARNING
Testing by putting gas (compressible media) under pressure can be very
dangerous. Local laws and regulations regarding to the hazard involved in
testing with a compressible medium must be respected. Hazardous
examples are explosion risk due to uncontrolled medium expansion and/or
suffocation risk due to oxygen depletion.
WARNING
Any rebuilding or modification of the heat exchanger is the responsibility of
the end user. Regarding recertification and pressure test (PT) of the heat
exchanger the local laws and regulations for in service inspection must be
respected. Example of a rebuilding is that more number of plates are
added to the plate pack.
If there is any uncertainty about the testing procedure of the heat exchanger,
consult an Alfa Laval representative.
6.7 Regasketing
The procedures below concern field gaskets, ring gaskets and end gaskets.
NOTE
Before removing the old gaskets, check how they are attached.
200000423-1-EN-GB 42
6 Maintenance EN