Emergency plate heat exchanger repair
Emergency plate heat exchanger repair restarts production stopped by a failed pack. Tell us what has stopped and whether the plant is down now. A specialist who works on that type of unit will come back to you.
Tell us about your emergency plate heat exchanger repair
Five answers, all from memory. The detail comes next, and it is optional.
See the privacy notice for how these details are handled.
Common plate heat exchanger problems
Weeping at the pack
A leak along the edge of the plate pack, usually the gaskets rather than the plates.
Regasketing →Cross contaminationThe two fluids are mixing
Product or utility appearing on the wrong side, which normally means a cracked plate.
Repair options →Losing dutyPressure drop up, duty down
Fouling between the plates, widening the approach temperature and restricting flow.
Cleaning options →UnsureNot sure what is wrong
Send the nameplate and what you have noticed. That is enough to get an answer.
Send the details →Emergency plate repairs cover
Emergency plate heat exchanger repair is for a pack that has failed with the plant down. A gasket failure and a cracked plate look similar from outside and take very different amounts of time, which is the first thing to establish.
- A pack leaking badly enough to stop production
- Fluids mixing between the circuits, contaminating product or the system
- A unit that will not hold pressure after a rebuild
- A pack tightened to its limit and still weeping
- A spare pack that was supposed to be ready and is not
What happens next
Send the details
Nameplate, what has happened, and whether the plant is down. Two minutes, and it decides the approach before anyone travels.
A specialist makes contact
To confirm whether the fault is a gasket or a cracked plate. A gasket weeps at the edge of the pack, a cracked plate lets the two fluids mix, and they are different jobs on different timescales.
Fast repair or full rebuild
A regasket on site can return a unit quickly. A strip, clean, dye penetrant inspection and rebuild takes longer and establishes the condition of every plate instead of assuming it.
Tested, then back in service
Each side is pressure tested on its own before the pack returns to service. Testing both together hides a cracked plate, because the pressure is equal either side of the crack.
What affects how quickly a unit is back
Gasket or plate
A gasket failure weeps at the edge of the pack and is the quicker repair. Fluids mixing means a cracked plate, and dye penetrant testing has to find which of a hundred plates it is before the pack can be rebuilt to its dimension.
Gasket and plate availability
Both are model specific, and on older or discontinued units this is usually the constraint rather than the labour.
Whether a spare pack exists
A spare pack turns a breakdown into a changeover measured in hours. Without one, the repair time is the downtime, whatever the repair turns out to be.
On site or workshop
A regasket can be done in place with room to work. Tank cleaning and inspection under ultraviolet light cannot, and without them the plate condition stays unproven.
Emergency plate heat exchanger repair questions
Can a plate heat exchanger be repaired on site?
A regasket can often be done in place where there is access. Proper cleaning and plate inspection need a workshop, so an on site repair returns the unit to service without establishing the condition of the plates.
Fluids are mixing. Is that a gasket?
Usually not. Fluids crossing between circuits normally means a cracked or perforated plate, and no amount of tightening or regasketing addresses that.
Can we tighten it to get through the shift?
Sometimes it stops a weep, and every time it does the pack gets closer to the dimension below which it cannot seal at all, at which point the plates begin to deform.