Prelite insulation sectionals in the form of pipe covers and boards consist of expended Perlite powder bound together by an inorganic binder ( sodium silicate ) and reinforcing fiber .Completely non-flammable, they are widely use as insulation for heated equipment , vessel and piping.
The major advantages that Perlite insulation sectional have over 2 main competitors calcium silicate and rock wool are :-
Corrosion ResistancePerlite insulation sectional have a high sodium silicate-to-chloride ratio . Sodium silicate is a corrosion-inhibitor , which limits the corrosive effects of soluble chlorides . The water-repellent nature of Perlite prevent the entry of soluble chloride into the system . Thus it helps avoid unnecessary shutdowns and loss of production hours at refineries , petrochemical and power plant cause by corrosion of piping , fittings and vessels .
Water repellenceThe extremely water repellent nature of Perlite insulation sectional means that they retain their low thermal conductivity factor even when there is water ingress into the system . Calcium silicate and rock wool on the other hand have very high water absorption factor resulting in loss of their insulation properties and an increase in the operational cost of plant .
Acid/Alkali ResistantBecause of its very low acid and alkali absorption factors , Perlite does not deteriorate when in contact with either of these corrosive substances .http://www.pj-energy.com/CorroShield.asp#Detail1
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