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UTILITIES














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-UTILITIES:  COMMON SPECIFICATIONS

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

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

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

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

5                 Instrument air at 45 psig, 0F 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 600F, Dowtherms below 750F, fused salts below 1100F, direct fire or electricity above 450F.

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
















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