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INSULATION














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-INSULATION

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

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

3                 Ceramic refractories at higher temperatures.

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

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

                    1.25 in. at 600F.

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
















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