Ageing of thermal insulation materials. Determination of the long-term change in thermal resistance of closed-cell plastics (accelerated laboratory test methods) Ingestion-build-78747 BS 188 provides users with

BS 188 provides users with a test method for measuring the kinematic viscosity and for the calculation of dynamic viscosity from a knowledge of the kinematic viscosity and the density determined at the same temperature

BS EN 60156 guideline specifies the method for determining the dielectric breakdown voltage of insulating liquids at power frequency

this document is applicable to both internal and external energy savings evaluators

While EN 474 is still the principal standard for the EU

BS EN ISO 11737 Part 1 specifies the requirements to be met in the determination of bioburden

Ageing of thermal insulation materials. Determination of the long-term change in thermal resistance of closed-cell plastics (accelerated laboratory test methods) Ingestion-build-78747 BS 188 provides users with1 Scope This International Standard specifies two laboratory test methods, based on slicing and scaling techniques, to determine the long term changes in the thermal resistance of closed cell (normally 90 %) cellular plastic materials that contain gases which, through diffusion processes, affect the properties of a foam with time. Using standard methods for the measurement of thermal resistance, method A consists of periodic measurements performed