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Heat Transfer - Engineering

Q1:

Which of the following is the most widely used heat insulating material for pipelines carrying steam ?

A Tar dolomite bricks followed by asbestos.

B Fireclay refractory followed by aluminium sheet.

C Cotton followed by aluminium foil.

D 85% magnesia cement and glass wool.

ANS:D - 85% magnesia cement and glass wool.

The most widely used heat insulating material for pipelines carrying steam is typically 85% magnesia cement and glass wool. This combination provides effective insulation against heat transfer and is commonly used in industrial applications to minimize heat loss in steam pipelines. Therefore, the correct option is: 85% magnesia cement and glass wool.