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Maximum service temperature is a measure indicating the maximum continuous temperature at which an insulation material can operate without any degradation in thermal insulation performance.MST is either measured according to:aximum Service Temperature (MST) under 500Pa â a guarantee that can be used for design. To estimate the highest continuous operating temperature at which a product can be used, a variety of methods exists.
Background. The maximum continuous operating temperature can be measured in two categories (a) short time exposure (a few hours) and (b) continuous use over a period of 5000 / 20,000 hours.ur index compares material performance in category (b). after these periods there is a decrease in tensile strength compared to original value. As with all thermoplastics the maximum service temperature also depends on the duration and magnitude of mechanical stresses on the material in application.