Explanation of "Class 1" Building Materials

ASTM International (ASTM), originally known as the American Society for Testing and Materials, is an international standards organization that develops and publishes voluntary consensus technical standards for a wide range of materials, products, systems, and services. 

A Closer Look At The Class 1 Fire Rating And ASTM E-84 Results of PSP^® Fume Exhaust Duct

Prior to the appearance of 300 series fluoropolymer coated stainless steel, the most common materials for process ventilation were galvanized steel, polyvinyl chloride, polypropylene and FRP duct.

In today's high-cost high-tech process facilities, strong regulations and higher standards for fire-safety are turning the attention of facility owners, engineers, and underwriting insurers alike toward PSP^® fluoropolymer coated fume exhaust duct. 

To understand why, let's take a look at how PSP^® gets its superior Class 1 fire rating.