UFC 3-600-01
17 April 2003
with change 16 January 2004
6-14.1
Petroleum-Based Hydraulic Fluids. The following requirements
must apply:
6-14.1.1
Provide automatic sprinklers directly over, and at least 6.1 m (20 ft)
beyond the hydraulic equipment. Complete sprinkler protection is required if the
structure is of combustible construction. Sprinklers may be omitted near a single
small system or multiple adjacent small systems not exceeding 380 L (100 gal)
aggregate capacity, and if the construction is noncombustible and ignition
sources are not normally present, and provisions exist for automatic or manual
shutdown of the system(s).
6-14.1.2
An automatic switch, activated by sprinkler water flow alarm, fusible
link, or other fire detector, must be provided to shut down the system if there is
380 L (100 gal) or more of hydraulic fluid.
6-14.2
Hydraulic Test Systems. Hydraulic test systems must comply
with the following:
6-14.2.1
For hydraulic systems that use pressures exceeding 1380 kPa (200
psi), SAE 1010 dead-soft, cold-drawn, seamless-steel tubing (or equivalent) must
be used. A factor of safety of eight over normal working pressure must be used.
For systems with working pressures in excess of 17,240 kPa (2,500 psi), a factor
of safety of four over normal working pressure is acceptable. Tubing is
preferable to pipe. Tubing can be bent to fit in restricted spaces with a minimum
number of fittings, reducing the number of possible leakage points. Solderless,
steel fittings of the flareless "locking-sleeve" type or flare type must be used.
6-14.2.2
Use of threaded pipe should be avoided. Where threaded
connections are used, requirements of ANSI B1.20.1 Pipe Thread must be met.
A safety factor of eight over maximum normal pressure must be used.
6-14.2.3
Tubing runs must have as few bends as possible, but should have
at least one bend to provide for thermal expansion and contraction. The
minimum radius of tube bend must be three tube diameters.
6-14.2.4
Where hose must be used for flexible connections, it must be steel
reinforced, designed for the hydraulic fluid being used, and capable of
withstanding five times the actual operating pressure. Hose couplings and
fittings and minimum bending radius must be in accordance with the hose
manufacturer's instructions. Hose must be installed so as not to rub against
objects as a result of machine movement, vibration, or pressure surges.
6-14.2.5
Piping and tubing must be anchored or secured to minimize failure
due to vibration. Pipe supports must not prevent normal thermal expansion.
6-14.2.6
There must be an accessible, well-marked, emergency shutoff
switch for each pump.
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