I am very interested in knowing how to inspect a prpane & Butane line that are delivering the prodact at -45 &25 Deg f respectively.
The piping length is about 10 miles that are going from our plant to the sea island.
I wonder if someone can help me with the techniques to inspect the piping under cold insulation. Basically, we have a piping to transfer prpane & BUtane at -45 DEG F & 25 Deg F to the sea island. We dont know thier condition and the piping are not equiped with Instrument scraping indications...