TM 10-4320-317-13
(13) Using formula provided below, determine point at which pressure-reducing valve must be installed in hoseline:
Altitude at hill crest - Allowed additional vertical footage = Pressure-reducing valve installation point
m.
Second Pressure-Reducing Valve. If elevation continues to drop excessively beyond first pressure-reducing valve
installation point, a second pressure-reducing valve must be installed in hoseline. Using formula provided below,
determine point at which second pressure-reducing valve must be installed in hoseline:
Altitude at first pressure-reducing - 346.5 = Second pressure-reducing valve installation point
(346.5 = allowed additional vertical footage before reaching safety limit)
2-7. TWDS Packing.
a.
Save all packing materials and store them in their opened containers after removal of contents.
b.
Return unused components to crates.
c.
Return all fiberboard and plywood boxes to original crates.
d.
Retain all packing materials at installation site. This will speed repacking when moving to a new site or
returning to storage.
2-8. Assembly and Preparation For Use.
a.
General. This paragraph provides general instructions for assembly of the 10-mile hoseline segment.
(1) Use enough hoseline to provide slack so that connections to pumping stations and storage assemblies are
easily made.
(2) Hoseline is installed by flaking hose from rear of truck and manually positioning hose. The lengths of hose
are connected together using grooved pipe couplings. Every 1000 ft (305 m), a swivel joint is installed.
(3) As truck moves forward along route, hose flakes out and is manually laid out behind the truck. Any bends,
twists, or kinks in hoseline must be straightened.
CAUTION
Hose lengths should be snaked slightly to allow at least 3 ft (0.92 m) of
slack for each hoseline length. Contraction of taut hoseline during
startup will damage equipment.
(4) A minimum of two trucks with crews of five men each is recommended for hose-laying operations. Crews
alternate between laying hose and reloading trucks. Individual task assignments for each crew member
are as follows:
(a)
One supervisor (1, Figure 2-6) is needed per truck (2) to oversee hose-laying operations. Should a
problem develop during hose-laying operations, the supervisor (1) is responsible for contacting
operators at pumping stations who are packing the hoseline.
(b)
One driver (3) is needed to operate each truck (2).
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