CAS magnesium insulation: parameters and where it fits
A magnesium-based inorganic insulation supplied as flexible roll, board and pipe section, aimed at petrochemical duties inside the GB/T 4272 temperature range.
Insulation selection on petrochemical plant starts from four conditions: thermal conductivity, environment, water resistance and corrosion behaviour. Material categories overlap, so there is no single correct answer for a given temperature; the choice depends on which of those conditions dominates.
CAS magnesium insulation is an inorganic product based on brucite with other inorganic high-temperature raw materials, supplied as flexible roll, board, semi-rigid board and pipe section. The internal structure is microporous, which is where the low conductivity comes from.
The governing standard
GB/T 4272 covers general requirements, material performance, design, structure, installation and acceptance for insulation of equipment and pipework with surface temperatures from -196 C to 850 C. Product data sheets should be read against that range: a figure quoted at one mean temperature does not describe behaviour across the whole envelope.
Reference note. Figures and standard references are indicative and do not replace the project specification, the current edition of the standard, or product test reports for the specific supply.