I need to provide freeze protection at a few remote oil pipeline valve stations. These would be at above-grade pig launcher/receivers and tie-in locations where we have drain valves. No utility power is readily available or cost-effective to bring into the area, we are in NE Colorado where we can experience cold snaps that last 2-5 days at or below -0degF, and will experience freezing issues if we don't apply some sort of heat trace freeze protection.
Has anyone designed for a similar installation? We have a vendor pushing us hard on their solar-powered, dc heat trace packaged system, but I'm concerned of it's serial number of 0001. Has anyone else utilized DC heat trace? Experience with it?
I know this can't be a unique situation and would really appreciate some feedback, tips/tricks, outside the box thinking, etc.
Thanks in advance!