MIL-HDBK-1003/8A
Change 2, 30 December 1991
EXTERIOR DISTRIBUTION OF STEAM, HIGH TEMPERATURE WATER,
CHILLED WATER, NATURAL GAS, AND COMPRESSED AIR
CONTENTS
Page
1.1
Scope . . . . . . . . . . . . . . . . . . . . . . . . .
1
1.2
Cancellation. . . . . . . . . . . . . . . . . . . . . .
1
1.3
Related Criteria. . . . . . . . . . . . . . . . . . . .
1
2.1
Types of Exterior Distribution Systems. . . . . . . . .
2
2.1.1
Steam and Condensate. . . . . . . . . . . . . . . . . .
2
2.1.2
Hot Water . . . . . . . . . . . . . . . . . . . . . . .
2
2.1.3
Compressed Air. . . . . . . . . . . . . . . . . . . . .
2
2.1.4
Chilled Water . . . . . . . . . . . . . . . . . . . . .
2
2.1.5
Cooling or Condensing Water . . . . . . . . . . . . . .
2
2.1.6
Natural Gas . . . . . . . . . . . . . . . . . . . . . .
2
2.2
Naval Facilities Guide Specifications (NFGS) Related to
Distribution Systems. . . . . . . . . . . . . . . . .
3
2.2.1
NFGS-02685, Exterior Buried Natural Gas
Distribution Systems. . . . . . . . . . . . . . . . .
3
2.2.2
NFGS-02693, Exterior Shallow Trench Heat
Distribution System . . . . . . . . . . . . . . . . .
3
2.2.3
NFGS-02694, Exterior Underground Heat Distribution
Systems . . . . . . . . . . . . . . . . . . . . . . .
3
2.2.4
NFGS-02695, Exterior Aboveground Steam Distribution
System. . . . . . . . . . . . . . . . . . . . . . . .
3
2.2.5
NFGS-02696, Exterior Piping Insulation. . . . . . . . .
4
2.2.6
NFGS-02697, Exterior Buried Pumped Condensate
Return System . . . . . . . . . . . . . . . . . . . .
4
2.2.7
NFGS-02698, Exterior Buried Preinsulated Water
Piping. . . . . . . . . . . . . . . . . . . . . . . .
4
2.2.8
Exterior Compressed Air Piping System . . . . . . . . .
4
2.3
Loads and Distribution System Locations . . . . . . . .
4
2.3.1
Requirements for Individual Facilities. . . . . . . . .
5
2.3.2
System Load Demand Factors. . . . . . . . . . . . . . .
5
2.3.3
Aboveground and Underground Systems . . . . . . . . . .
5
2.3.4
Distribution Routes . . . . . . . . . . . . . . . . . .
5
2.3.4.1
Aboveground Piping Routes . . . . . . . . . . . . . . .
5
2.3.4.2
Buried Piping Routes. . . . . . . . . . . . . . . . . .
8
2.3.5
Economic Studies. . . . . . . . . . . . . . . . . . . .
8
2.3.5.1
Annual Owning, Operating, and Maintenance Costs . . . .
8
2.3.5.2
Steam Versus High Temperature Water Distribution. . . .
8
2.3.5.3
High-Pressure (above 50 psig) (344.5 kPa) Steam
Versus Low-Pressure (0 to 14 psig) (0 to 103.4 kPa)
Steam Distribution. . . . . . . . . . . . . . . . . .
8
2.3.6
Insulation for Shallow Trench Systems Which Exceed
500 Feet. . . . . . . . . . . . . . . . . . . . . . .
8
ix
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