Could this tube insulation be asbestos
The inner section is definitely fiberglass, however the outer covering could be asbestos. I have worked on some industrial jobs where steam pipes were very similar. It should be tested to be sure. In 1 case they just painted the outer asbestos casing, in 2 others we removed all of it, big job and lots of safety gear and regulations.

With residential, in my area a homeowner can do the work but with commercial or industrial facilities, pros have to be hired, so it would be best to have it tested to know for sure so that safety or encapsulated processes can be taken to make it safe.