Perlite is nontoxic and nonflammable; however, the nature of the material and the large quantities involved require the use of special operations, handling, and safety procedures. This publication provides guidance for reducing the risks of unplanned perlite releases and incidents that could have potential for personal injury, property damage, downtime, and environmental impact.

It covers the use of perlite in cryogenic coldboxes and cryogenic bulk storage vessels and focuses on safety, design considerations, operation, maintenance, perlite handling procedures, and emergency perlite management. This publication is directed to industrial gas plant manufacturers, owners, and operators of facilities that utilize and maintain perlite as an insulation medium for cryogenic equipment. Insulating materials, such as rock wool or vermiculite and other synthetic silicates, are not covered in this publication. This publication does not cover hazards related to toxic and flammable gases.

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