MIL-HDBK-1005/9A
other hazards by placement in a specially designed utility
trench. For buried lines, apply general sewer pipe selection
guidelines.
c) Cathodic protection.
Refer to MIL-HDBK-1004/6,
Lighting and Cathodic Protection.
3.8.2.4
Special Considerations
a) Freeze protection. For design criteria in cold
regions, refer to MIL-HDBK-1025/2.
b) Cleanouts. Provide cleanouts at junctions,
directional changes, end of pipe run, and every 400 feet (122 m)
of continuous runs.
c) For thrust support, hanger sizing, and spacing,
consult manufacturer's design manual. Install pipelines inboard
of pier fendering systems or preferably in utility tunnels.
Protect pipelines from damage from below due to tide-carried
debris. Consider composite type hanger system for increased
durability in the marine environment.
d) Piping, manholes, and pump wells need not be
double-walled or have secondary containment unless required by
local regulations. Check local regulatory agencies for
requirements.
3.8.3
Pressurized Pier Collection System. Use pumping only
when a gravity system cannot serve hydraulically, such as for
wastewater collection lines at piers. For those pumping systems:
a) Locate pumps as close to oily wastewater source as
possible to maximize detention time between pumping and
treatment and minimize impact of mechanical emulsification; or,
as an alternative, use equalization facility. If equalization
is employed, avoid detention times that may result in odor and
gas production. Use vapor controls as required by applicable
environmental regulations.
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