Cleaning and Testing:
We have facility for cleaning and testing of PHE plates. Due to constant exposure and nature of the transfer fluids, the plates tend to corrode, deform or develop pin holes. This can affect the working of heat exchanger as it could lead to decrease in thermal performance, increase in pressure drop or leakage which will increase downtime. Depending on the media and frequency, mechanical cleaning of the plate heat exchanger should be performed to detect any damage or corrosion.
Plates are cleaned using high pressure water spray and or suitable chemicals compatible with the plate material.
All good second plates procured by PHE sealing solutions are cleaned and Dye penetrant tested for any cracks and pin holes. In case of any deformations, the plates are mechanically repressed to ensure its original shape.
Dye Penetrant Testing:
The plates are subjected to dye penetration Testing to determine any cracks or pinholes in the plates. The test surface is cleaned to remove any dirt, paint, oil, grease or any scaling. The penetrant is then applied to the surface of the Plates. The excessive penetrant is removed and a white developer is applied on the other side of the plate. After the response time the plates are then inspected under visible light for cracks and pinholes.
Ultraviolet Crack Testing:
We perform Ultraviolet crack detection if the customer demands it. Fluorescent dye is applied to the surface of the plates and after the response time, they are inspected under UV light in a dark environment. This enables us to detect even the tiniest flaws on the surface of the plates. This test is performed only if requested by the customer.