Meeting The Standards Of ASTM C610 For Expanded Perlite Pipe And Block Insulation

The ASTM 610 specification covers molded expanded perlite block, fittings, and thermal pipe insulation intended for use on surfaces with temperatures between 80 to 1200°F (27 to 649°C). It specifies that certain test methods shall be performed in order to determine the properties of the block, fitting, and pipe insulations: density, apparent thermal conductivity, linear shrinkage after heat soaking, flexural strength, compressive strength, weight loss by tumbling, moisture content, water absorption after heat aging, surface bearing characteristics, hot-surface performance, and stress corrosion cracking of austenitic stainless steel.

 Sproule WR-1200 made by Johns Manville Industrial Insulation Group is a pre-formed, high-temperature, non-wicking pipe and block insulation that meets or exceeds the physical property requirements  of ASTM C610. Sproule WR-1200 has compressive strength, low thermal conductivity and corrosion inhibiting properties that are ideal for piping that is susceptible to stress corrosion cracking at operating temperatures above 140°F (60°C). The XOX corrosion inhibitor that is implemented during the Sproule WR-1200 manufacturing process prevents corrosion where moisture and chlorides may become trapped between the insulation and stainless steel.