UTILITIES














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-UTILITIES:  COMMON SPECIFICATIONS

1                 Steam: 15-30 psig, 250-275°F; 150 psig, 366°F; 400 psig, 448°F; 600 psig, 488°F or with 100-150°F superheat.

2                 Cooling water: Supply at 80-90°F from cooling tower, return at 115-125°F; return seawater at 110°F, return tempered water or steam condensate above 125°F.

3                 Cooling air supply at 85-95°F; temperature approach to process, 40°F.

4                 Compressed air at 45, 150, 300, or 450 psig levels.

5                 Instrument air at 45 psig, 0°F dewpoint.

6                 Fuels: gas of 1000 Btu/SCF at 5-10 psig, or up to 25 psig for some types of burners; liquid at 6 million Btu/barrel.

7                 Heat transfer fluids: petroleum oils below 600°F, Dowtherms below 750°F, fused salts below 1100°F, direct fire or electricity above 450°F.

8                 Electricity:  1-100Hp, 220-550V; 200-2500Hp, 2300-4000V.
















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