MIL-HDBK-1003/3
Page
7.2.1.1
Exterior Water Piping Design............... 69
7.2.1.2
Water Velocity............................. 69
7.2.1.3
Water Treatment............................ 69
7.2.1.4
Pipe Sizing................................ 70
7.2.1.5
Valve and Fitting Pressure Drops........... 70
7.2.1.6
Return Arrangements........................ 70
7.2.1.7
Air Vents.................................. 70
7.2.2
Hot Water Heating Systems.................. 70
7.2.2.1
Hot Water Piping........................... 70
7.2.2.2
Hot Water Coils............................ 70
7.2.2.3
Expansion Tanks and Air Separator.......... 73
7.2.2.4
Domestic Hot Water Generator............... 74
7.2.2.5
Heat Exchangers............................ 74
7.2.2.6
Pumps...................................... 79
7.2.3
Chilled Water.............................. 80
7.2.3.1
Pipe Size.................................. 80
7.2.3.2
Coils...................................... 80
7.2.3.3
Expansion Tanks............................ 80
7.2.3.4
Pumps...................................... 80
7.3
Steam...................................... 81
7.3.1
General.................................... 81
7.3.2
Low Pressure Steam Systems................. 81
7.3.2.1
Pipe Sizing................................ 81
7.3.3
High Pressure Steam Systems................ 81
7.3.3.1
Pipe Sizing................................ 81
7.3.3.2
Boiler..................................... 89
7.3.3.3
Heat Exchanger............................. 89
7.3.3.4
Steam Pressure Regulating Valves........... 89
7.3.3.5
Condensate Pumps and Flash Tank.............92
7.3.3.6
Steam Coils - General...................... 92
7.3.3.7
Steam Traps................................ 92
7.3.4
Boilers.................................... 92
7.3.5
Freezing of Steam Coils - General.......... 97
7.3.5.1
Freezing Due to Air Stratification......... 97
7.3.5.2
Freezing Due to Build-up of Condensate in
the Coil................................... 98
7.3.6
Refrigerant Piping.........................101
7.3.6.1
General....................................101
7.3.6.2
Sizing.....................................101
7.3.6.3
Arrangement................................101
8.1
General Requirements.......................104
8.1.1
Choice of Controls.........................104
8.1.1.1
A Guide to Choose Control Systems..........104
8.1.1.2
Factors to Select Control Systems..........104
8.1.2
Designing DDC Systems......................105
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