15 August 2002
Accessibility to all outlets along the dock.
Outlets. Locate service outlets in accordance with criteria in MIL-HDBK-
1025/2 Dockside Utilities.
Looped Pipelines. Sectionalize and valve all liquid, steam, and gas lines
to provide service with a minimum of interruption of work should a break occur along
Fresh Water. For industrial use, and with an abundant supply, it may be
used to fill fire protection, flushing and cooling requirements. In cold climates,
waterlines must be protected from freezing. Provide meters to record water
consumption. All fresh water outlets must have a backflow preventive device, and be
painted as specified in MIL-HDBK-1025/2 Dockside Utilities, for services on piers.
Potable Water. Provide one 63.5 mm (2-1/2 in) valved outlet at each
service gallery, and size the mains to adequately provide the required quantity of
distilled or potable water at a residual pressure of 275.79 to 551.58 kPa (40 to 80 psi) at
any outlet. The quantity of water required by drydocks is contained in MIL-HDBK-
1025/2 Dockside Utilities
Flushing and Cooling. Flushing/cooling systems are be part of the fire
protection systems where high pressure fire protection systems are provided, including
If a graving dock is provided with fire hydrants only outside the dock, as
fire protection, install the flushing/cooling systems separately.
Provide one 63.5 mm (2-1/2 in) valved outlet in each service gallery.
Supply the quantity of water required for flushing and cooling to the most
remote flushing/cooling outlets at not less than 276 kPa (40 psi) residual
pressure. Connect systems either to station pumps or to separate graving
dock pumps having a minimum discharge pressure of 1034.21 kPa (150
psi). The required quantities for combined flushing, cooling and fire
protection are contained in contained in MIL-HDBK-1025/2 Dockside
Salt or Nonpotable Water Supply. When fresh water is not abundant,
use salt or nonpotable water system for flushing, cooling and fire protection.
Station System Connection. Where a graving dock fire protection
system is connected to station fire protection and flushing/cooling systems, make
connection through a valved check valve and a valved pressure reducing valve in a
bypass permitting the station system to supply flushing/cooling water to the dock
system. This arrangement also permits the graving dock fire protection pumps to
augment the station system in emergencies.