The steam line should be insulated. It should not be in direct contact with the material. This is for two reasons: to keep the line hot possibly making the surface dangerously hot to occupants, and to preserve the material. A steam line run in direct contact with any surface that is tiled could put some really bad stresses on the ceramic or stone tile on the surface - especially in a commercial steam room that may run extended hours. It could get hot enough to burn someone and be a safety hazard as well.
Steam is the vapor created by boiling water. Water boils at 212 at sea level. Steam CAN be significantly hotter. Since it originated from boiling water, which was 212, on the outlet to only be 110, most of it would have condensed, and you won't have much steam...saturated air, certainly, but not steam. So, you could have lots of heated mist at 110, but not steam. The mist is liquid droplets of water, steam is a colorless vapor. The mist forms when the steam hits the cooler air of the steam room. So, how does a steam generator making at least 212-degree steam vapor at the source, ensure it is only 110 at the outlet?
The foam won't melt at 212, but the rest of the structure might have problems. I did find in the spec sheet a maximum of 158-degrees F - missed that the first time through.
No idea how hot the actual steam pipe got, but it wouldn't surprise me if it exceeded that if ran uninsulated against the back. Depending on where the steam generator is located, it's likely to exceed that for at least some of the run, if not all.
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