Mechanical Pipe Shields Manufacturing was established in 1998, recognizing the need for insulated pipe supports in the Seattle area. Originally, these inserts were encased with calcium silicate and a two-piece 360-degree galvanized jacket. However, complaints from installers about the calcium silicate spurred further research, ultimately altering the design to a one-piece 360-degree PVC jacket with a living hinge and locking seam.
To replace the calcium silicate, Dow Chemical was asked to research polyisocyanurate insulation to see if there was a product that would better support load bearing weight at hanger points from ½ inch to 12 inch pipe. See Saddles and Hanger Compressive Strength Tables—Tables—for the chart created by Dow Chemical based on its research.
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