Steam Pipe insulation. Any gain for insulating return pipes?
When we insulated HW, CW, Steam, Chilled Water, Pipes we always insulated the straight pipes to the ells then install a fitting called zeston fitting what it is a piece of fiberglass wrap with a plastic cover that conformed to the ells with little pins holding them on.
Real nice looking job.
Probably hard to find for homeowners though this was commercial and industrial.