Curved pipes are thermally insulated by wedge-shaped annular elements of resin-bonded glass or other mineral fiber in which the fibers are perpendicular to the axes of the elements, so that these are axially compressible. The elements are pressed together into face-to-face contact along the pipe. They may be made by stamping cylinders out of fiberboards and cutting each cylinder along a plane inclined to the axis.
There is disclosed fiberglass insulation for use in insulating a pipe elbow, the insulation comprises a continuous strand of a plurality of removably connected fiberglass wraps, each of said wraps comprises a pair of opposed ends having essentially the same width and a mid-section between the opposed ends having opposed arcuate sides wherein the width of the mid-section measured at any point along the opposed arcuate sides is greater than the width of the opposed ends. Also included as part of the present invention are the individual wraps which comprise the continuous strand of fiberglass insulation.
A protective cover for an insulated pipe bend. A corrugated band-form material is spirally wound into a tube and the adjoining tube edges are secured, such as by lapping, to form a non-slipping joint. The corrugated tube thus provided can be readily shaped to conform to an existing tube bend. The corrugated tube is cut lengthwise into two or more parts which are then placed over the insulated pipe bend. The cut edges are re-joined to form the protective cover.
Pipe insulation is disclosed made up of right cylindrical elements, or washers, held together by a flexible coating and in which the fibres are aligned in planes perpendicular to the cylindrical axis. The elements have central bores to receive pipes to be lagged. The elements have excellent axial compressibility and can therefore be used around bends in pipes without cutting.
A tubular member defining a shield is formed of a pliable yet resilient plastic split along one side of its length. The cross section of at least one end is selectively tapered to provide an extended end portion at the extreme end of the tapered cross section. The extended end portion facilitates the pressing of the split tubular member onto a selected length of a graphite shaft of a golf club, to prevent wear on the graphite shaft by the divider sections of a golf bag when the clubs are being carried in the bag.
A thermal insulation structure of fibrous material is described. The insulation comprises alternating and abutting parallel strips of fibrous material wherein the fiber orientations in alternate strips are at right angles to each other. This structure preserves the insulating properties of the fibrous material while permitting it to be readily curved around a pipe without creating stresses in the material which would cause it to tend to straighten out. The fibrous material may be glass fiber, mineral wool or the like, preferably glass fiber. The density of the individual insulating batt strips may be as low as 0.5 pcf, but is preferably at least 1.5 pcf. Both pipes and curved vessels may be advantageously insulated by this invention.
