INSULATION

-INSULATION

1 Up to 650°F, 85% magnesia is most used.

2 Up to 1600-1900°F, a mixture of asbestos and diatomaceous earth is used.

3 Ceramic refractories at higher temperatures.

4 Cyrogenic equipment (- 200°F) employs insulants with fine pores in which air is trapped.

5. Optimum thickness varies with temperature: 0.5 in. at 200°F, 1.0in. at 400°F,

1.25 in. at 600°F.

5 Under windy conditions (7.5 miles/hr), 10-20% greater thickness of insulation is justified.


				INSULATION



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		-INSULATION 1 Up to 650°F, 85% magnesia is most used. 2 Up to 1600-1900°F, a mixture of asbestos and diatomaceous earth is used. 3 Ceramic refractories at higher temperatures. 4 Cyrogenic equipment (- 200°F) employs insulants with fine pores in which air is trapped. 5. Optimum thickness varies with temperature: 0.5 in. at 200°F, 1.0in. at 400°F, 1.25 in. at 600°F. 5 Under windy conditions (7.5 miles/hr), 10-20% greater thickness of insulation is justified.



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