TEV on long liquid line, liquid hammer

[mad fridgie]

Practically pressure from liquid would be approx 10barg at 20C ambient, so pressure pulses would less.
What Chef calcs did prove was pressure spikes sure can be a problem (breaking of piping) a common problem!
I would hope the client has installed an Alarm system, surely he did not loose product a second time?
There are thousands of system with long pipes runs as you have described.
(I remember Littlewoods systems were always like this 25 years ago, much longer pipe runs)
In court, I do not know how you can prove negligence. It may not be a perfect design, but what is!
On the original call the tech, added 60Kgs of refrigerant (seems like alot), was it removed. maybe there was a leak, some moisture had been drawn in causing the valves to block. No reduction it temp.
Was a leak found, were driers replaced at each service call (technical should always be done)
this you can find on the service invoices.
You can not blame the tech for the first lot of product lose, as already unfrozen before he arrived.

[Peter_1]

I have 1 week time to give my report and I will add this as an additional advice. Thanks for you ongoing support you both.