Abstract: The disclosure relates to a plastic jacket having air spaces formed by spaced walls used to insulate hot and cold piping systems and the fittings for those systems. The jacket is made from multiple segments, which are joined together along their longitudinal joints. The segments are joined to each other by tongue and groove connections. One segment can be cut longitudinally and glued to another segment to make a larger segment to fit various diameters of pipe. In a further embodiment, the plastic jacket is modified to form the duct of a heating, ventilating and air conditioning system. The inner wall of the jacket forms the air duct. In both embodiments, at least some of the segments have hinge portions created by omitting the inner wall at the hinge portions.

Abstract: The disclosure relates to a plastic jacket having air spaces formed by spaced walls used to insulate hot and cold piping systems and the fittings for those systems. The jacket is made from multiple segments, which are joined together along their longitudinal joints. The segments are joined to each other by tongue and groove connections. One segment can be cut longitudinally and glued to another segment to make a larger segment to fit various diameters of pipe. In a further embodiment, the plastic jacket is modified to form the duct of a heating, ventilating and air conditioning system. The inner wall of the jacket forms the air duct. In both embodiments, at least some of the segments have hinge portions created by omitting the inner wall at the hinge portions.

Abstract: An insulating jacket, that is removable and reusable, for insulating a hot or cold fluid distribution system is described. The jacket is made of a plurality of sections which mate and seal together to effectively seal the pipe section and/or fitting from the surrounding ambient atmosphere. Each of the jacket sections can be made of a clear thermoplastic material and the entire assembly is designed to employ the trapped air, between the inside wall of the jacket and the system element, as the insulator. Plural jackets are used to form plural radially spaced trapped air gaps.