Pipe insulation and corrosion protection system

DETAILED DESCRIPTION Referring to FIG.
1 of the drawings, such shows an insulation segment 10 with portions removed to illustrate its contents and illustrate steps involved in its manufacture.
The insulation and corrosion protection system of this invention uses elongated cylindrical tubular units of the insulation segments 10 to cover a pipe by joining the units together to form a continuous cover for an exposed pipe.
Insulation segment 10 includes an inner sleeve 14 at the innermost portion of the segment.
An inner jacket 16 of an elastomeric material surrounds and encloses inner sleeve 14.
Insulating material 18 is formed in a thicker layer around the exterior of inner jacket 16.
An outer jacket 20 of elastomeric material surrounds the exterior of the insulating material 18 and forms the outer weather resistant covering of the insulation segment 10.
In manufacture of insulation segment 10, it is formed on a mandrel 22 with inner sleeve 14 being formed directly on the mandrel.
Inner sleeve 14 is formed from a thin sheet of metallic material or scrim that is spirally wound around the mandrel to closely conform thereto and extend the length of the segment to be made.
Inner sleeve 14 is temporarily secured to a mandrel for holding it in place prior to application of inner jacket 16.
Inner jacket 16 is a layer of elastomeric material that is sprayed or otherwise coated on the exterior of inner sleeve 14 to completely enclose the exposed surface thereof and provide the inner most seal surface of the insulation segment.
Next, the insulating material layer 18 is applied to the exterior of inner jacket 16.
As mandrel 22 is rotated the insulating material is sprayed onto the exterior of inner jacket 16.
This material is preferably a liquid material that when aerated or sprayed expands or foams to form the insulating blanket.
The foam may be a synthetic insulating material of either the open cell or closed cell type depending on the desire of the user.
This material may be applied in one or more layers depending upon the characteristics of the specific material used and thickness of the insulation layer that is desired