Pipe insulation foam (Polyisocyanurate foam)

The most important feature of a thermal insulating material is its low thermal conductivity or, in other words, high thermal resistance. The use of polyurethane foam as an insulating layer around pipes not only maintains the heat inside the pipes and insulates them but also effectively prevents the penetration of moisture, water, and other corrosive fluids and gases into the insulation, as well as the growth and spread of microorganisms. In fact, these materials provide a seamless, integrated insulation that also protects pipes from mechanical damage.
Typically, polyurethane foam-insulated pipes have a dual-layer coating where the foam is applied to the pipe surface and protected by an outer layer, usually made of high-density polyethylene or aluminum foil. These insulations are lightweight and show good stability against abrasion and temperature changes.