MIL-HDBK-1005/7A
scattered customers, and future development is not expected, the
valve spacing should not exceed one mile.
(1) Lay out sections so that most of the design
flow can be maintained if any one section is cut out of the
system. Refer to MIL-HDBK- 1008C for fire flow requirements.
(2) Place valves in each branch at the point of
connection to an arterial main.
(3)
At intersections, valves should be provided
at all branches.
c)
Fire Hydrant Location. Refer to MIL-HDBK-1008C
and Construction and Recommended Standards for Water Works , 1997
edition.
7.1.2
Size of Mains. Compute quantity requirements in
accordance with Section 2.
7.1.2.1
Pressure Requirements Ashore
a)
Flowing water pressure should not be less than 20
psi, higher pressures are required for ship berthing and drydock
facilities in accordance with MIL-HDBK-1025 and MIL-HDBK-1029
series.
b)
Residual pressure should meet the requirements of
automatic fire extinguishing systems while providing 50 percent
of the average domestic and industrial flows, and the fire flow.
(Refer to MIL-HDBK-1008C.)
7.1.2.2
Computations . Analyze extensive systems using the
Hardy-Cross method of successive approximations. Computer
software such as H20NET, EPANET and Cybernet should be used.
7.1.3
Materials of Construction . Refer to AWWA manuals and
standards for detailed information on pipeline material
information. Listed below are AWWA manuals and standards for
detailed information.
AWWA
Manuals
M9
Concrete Pressure Pipe
M11
Steel Pipe - A Guide for Desig n and Installation
M23
PVC Pipe - Design and Installation
87
Previous Page
