Whoops,
A copper strap welded to the flow and return header at the top and bottom of the coil exist for structural reasons , so I am told by the supplier.
The coil was rated at 138/115 degC only, also according to the supplier. But with current low load conditions we have return water temps at...
Mr. Kenrad is right I think about the return water temp being lower than 115 Deg C at part load, the explaination makes perfect sence, but how do I prove that with the equation technically with the formula Q= U x A x LMTD. When on part load the U value decreases, how do I prove that the LMTD...
Lilliput,
Do not now if it was internal or external steress. The fracture was only a pin hole. It failed where the support strap connects to the hot pipe and happened at the back of the strap. The hot pipe header is supported off the ground at low level but it was at the strap at high level...
I have a heating coil 138/115 Deg C flow & return temperatures, design conditions. It is only 2 weeks old and recently burst at a support strap connecting the the flow and return header.
Before the incident under low load condition the return temperature was going back at 40 deg C. Is this...
