Dye Penetrant Test
Dye penetrant testing of cleaned plates. We find a cracked or pitted plate on the bench, before it causes cross-contamination in your process.
- Carried out after cleaning
- Every plate, both faces
- Cracks and pitting found on the bench
- Rejected plates shown to you
About Us
Since 2016, CJP has supplied, manufactured and serviced plate heat exchangers for industry and OEMs across India. From our Chennai works we make gasketed units, cooling tower fills and replacement plates and gaskets, and our crews install and service them.
We dye penetrant test plates after cleaning, so cracks are found on the bench, not in your process.
Our Clients
DP Test
A thinned or cracked plate passes product from one side to the other. On most duties this is the costly failure, not the leak you can see. Dye penetrant testing shows cracks that visual inspection misses. We test after cleaning. Penetrant cannot enter a flaw that is packed with scale.
Tell us the make, model and plate count of the unit, and what it runs on. We quote against the job, not a price list.
How DP Test Works
The steps in order, from taking the unit apart to putting it back together.Plates cleaned and dried
The test is only as good as the surface. Plates go to the bench clean and dry. Penetrant will not enter a flaw that is still full of deposit.
Penetrant applied and left to dwell
We apply penetrant over the plate face and leave it to draw into any opening in the surface. Then we remove the excess without flushing the flaw.
Developer drawn off
Developer pulls the penetrant back out of the flaw and spreads it. A crack too fine to see shows as a visible line on the plate.
Result recorded, plates sorted
We record every plate as we test it. Plates with an indication are set aside and shown to you with the rest of the pack. You then decide: replace the plates, replace the full pack, or replace the unit.
Send Us the Unit Details
To quote dp test we need:
- Make, model and plate count of the unit
- Whether the unit has had a cross-contamination event
- How old the pack is, if you know
- Whether replacement plates are wanted for any that fail
Workshop & Site
We clean plates, run dye penetrant tests, re-gasket and refurbish frames at our works in Chennai. We install units and service them on site at your plant. Units that come to us go back packed for transport.
We service every brand we supply spares for. Alfa Laval, GEA & Kelvion, Sondex and Tranter plate packs all go through the same cleaning, testing and re-gasketing line.
Turnaround depends on the plate count. It also depends on whether we refurbish the frame with the pack. We confirm the date once we have seen the unit, and again with the order acknowledgement.
- PHE InstallationFrame set out, plate pack built, unit connected and checked on site.
- Plate CleaningChemical cleaning of fouled plate packs, back to a clear channel.
- Assembly of Plate GasketsOld gasket off, groove cleaned, new gasket seated and set.
- PHE ServicingFull overhaul — plates, gaskets and frame, rebuilt and closed.
Frequently Asked Questions
01Will you service a unit you did not supply?
Yes. Most units that come to us were bought from someone else. We service Alfa Laval, GEA & Kelvion, Sondex and Tranter units, and the gasketed units we build ourselves. We hold the plates and gaskets for them.
02Is the work done at our plant or at your works?
We install units and service them on site at your plant. We do plate cleaning, dye penetrant testing, re-gasketing and frame refurbishment at our works in Chennai. The cleaning line and the blast booth are there.
03How long will our unit be out of service?
It depends on the plate count. It also depends on whether we refurbish the frame with the pack. We confirm the date once we have seen the unit, and again with the order acknowledgement. You can then plan the shutdown.
04What happens if some plates fail the DP test?
We set them aside and show you the result before we rebuild anything. You decide: replace the failed plates, replace the full pack, or replace the unit. We quote all three. We do not proceed until you choose.
05Do you collect and return the unit?
We pack serviced units and plate packs carefully before they go back, so nothing is damaged in transit. Tell us where the unit is. We quote collection and delivery with the rest of the job.
06How often should a plate heat exchanger be opened and cleaned?
It depends on the duty and the water. Common signs are a falling outlet temperature, a rising pressure drop across the unit, or a leak at the plate pack. If you see any of these, send us the readings. We tell you what the unit likely needs.
Talk to a Specialist
Message us on WhatsApp or email. We help you choose the right product.