I wanted to add one of Peter's stainless steel element enclosures to my RIMS tube so I disassembled it after 5 years of continuous use.
It has had probably 60 batches through the tube, and have never had it apart.
Aside from some corrosion on the element threads, I was surprised how clean the tube and the rest of element were.
I clean in place by circulating PBW solution through the pump and RIMS after finished brewing.
This is a 4500 watt 240 volt element running on 120 volts with a PID controlling temperatures.