Discuss properties that may be considered in the choice of materials used as insulators
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The owner, engineer, general contractor, insulation contractor and insulation and accessories manufacturers must communicate with each other from the very beginning of a project in order to minimize problems in the stages of design, specification preparation, construction, operations, and maintenance. Open and frank discussion between all parties is critical to helping the engineer establish the proper design criteria, define pipe and duct dimensions, select the insulation materials types and thicknesses, facings or jackets, and define the installation procedures to be followed. Ambiguities and omissions diminish when communications is encouraged. Such a discourse, along with knowledge of the most important insulation criteria as detailed below, will aid the engineer in calculating the thicknesses required for the intended service.
Characteristics of Insulation
Insulations have different properties and limitations depending upon the service, location, and required longevity of the application. These are taken into account by engineers when considering the insulation needs of an industrial or commercial application.
Thermal Resistance
The quantity determined by the temperature difference, at steady state, between two defined surfaces of a material or construction that induces a unit heat flow rate through a unit area. A resistance associated with a material shall be specified as a material R. A resistance associated with a system or construction shall be specified as a system R.