Alfa Laval Gasketed Plate-And-Frame Heat Exchanger T5

6.1 Cleaning – Non-product side

The cleaning-in-place (CIP) equipment permits cleaning of the heat exchanger without opening it. The purpose of cleaning with CIP is as follows:

• Cleaning of fouling and descaling of lime deposits

• Passivation of cleaned surfaces to reduce susceptibility to corrosion

• Neutralization of cleaning liquids before draining

Follow the instructions of the CIP equipment.

Use proper protective equipment, such as safety boots, safety gloves and eye protection, when using the cleaning agents.

Warning: This check requires trained personnel with PPE!

Greasing of the tightening bolts

Protection of the plate pack and gaskets

Upload a photo of the heat exchanger after the check

Sign off on the heat exchanger check

6.3 Manual cleaning of opened units

CAUTION: Never use hydrochloric acid with stainless steel plates. Water of more than 330 ppm Cl may not be used in the preparation of cleaning solutions.

It is very important that aluminium carrying bars and support columns are protected against chemicals.

NOTEP:Be careful not to damage the gasket during manual cleaning.

WARNING: Use proper protective equipment, such as safety boots, safety gloves and eye protection, when using the cleaning agents.

WARNING: Corrosive cleaning liquids. Can cause serious injuries to skin and eyes!

6.3.1 Deposits removable with water and brush

Plates do not need to be removed from the heat exchanger during cleaning.

1. Start cleaning when the heating surface is still wet and the plates are hanging in the frame.

The procedures below concern field gaskets, ring gaskets and end gaskets.

NOTE: Before removing the old gaskets, check how they are attached.

1. Open the heat exchanger, refer to Opening on page 33, and remove the plate that is to have a new gasket.

NOTE: Before opening the heat exchanger, check the warranty conditions. If in any doubt, contact the Alfa Laval sales representative. Refer to Warranty conditions on page 7.

3. Make sure that all sealing surfaces are dry, clean and free of foreign matter such as fat, grease or similar.

4. Check the gasket and remove rubber residual before attaching it.

Warning: This procedure requires trained personnel with PPE!

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.

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.

Have plates or gaskets been removed, inserted or exchanged?

If plates or gaskets have been removed, inserted or exchanged, perform a hydrostatic leakage test.

Enter the pressure used for the leakage test

Did the heat exchanger pass the internal and external sealing function test?

If the heat exchanger did not pass the test, describe the issues found.