Which of the following is the most widely used insulating material for steam carrying pipelines ?
Correct answer: D. Glass wool and 85% magnesia
- A. Ceramic fibre blanket
- B. Slag wool
- C. Vermiculite
- D. Glass wool and 85% magnesia
Explanation
85% magnesia is a traditional, widely used insulation for steam pipes because it has low heat conductivity and remains effective at elevated temperatures. Glass wool and ceramic fibre are also useful, but are not the standard answer for this general service question.
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