Parker Hannifin Corporation
| Parflex
®
Division | Ravenna, Ohio
|
parker.com/pfd
For detailed ordering information, please consult price list or contact Parflex
®
Division.
Hose
A
Tubing
B
Coiled Air Hose
&
Fittings
C
Transportation
D
Fittings
E
Tooling, Equipment
&
Accessories
F
General Technical
G
G-62
Use” on its layline and packaging. This Hose must be properly connected to
the appropriate Parker Fittings and properly grounded in order to dissipate
dangerous static charge buildup, which occurs in, for example, high velocity
CNG dispensing or transfer. Do not use any other Hose for CNG applications
where static charge buildup may occur, even if electrically conductive. Use
of other Hoses in CNG applications or failure to properly connect or ground
this Hose can cause a fire or an explosion resulting in death, personal injury,
and property damage. Care must also be taken to protect against CNG
permeation through the Hose wall. See section 2.6, Permeation, for more
information. Parker CNG Hose is intended for dispenser and vehicle use at a
maximum temperature of 180°F (82°C). Parker CNG Hose should not be used
in confined spaces or unventilated areas or areas exceeding 180°F (82°C).
Final assemblies must be tested for leaks. CNG Hose Assemblies should be
tested on a monthly basis for conductivity per ANSI/IAS NGV 4.2-1999; CSA
12.52-
M99.
Parker manufactures special Hose for aerospace in-flight applications.
Aerospace in-flight applications employing Hose to transmit fuel, lubricating
fluids and hydraulic fluids require a special Hose with a conductive inner tube.
This Hose for in-flight applications is available only from Parker’s Stratoflex
Products Division. Do not use any other Parker Hose for in-flight applications,
even if electrically conductive. Use of other Hoses for in-flight applications
or failure to properly connect or ground this Hose can cause a fire or an
explosion resulting in death, personal injury and property damage. These
Hose assemblies for in-flight applications must meet all applicable aerospace
industry, aircraft engine and aircraft requirements.
2.2
Pressure:
Hose selection must be made so that the published
maximum working pressure of the Hose and Fittings are equal to or greater
than the maximum system pressure. The maximum working pressure of a
Hose Assembly is the lower of the respective published maximum working
pressures of the Hose and the Fittings used. Surge pressures or peak
transient pressures in the system must be below the published maximum
working pressure for the Hose. Surge pressures and peak pressures can
usually only be determined by sensitive electrical instrumentation that
measures and indicates pressures at millisecond intervals. Mechanical
pressure gauges indicate only average pressures and cannot be used to
determine surge pressures or peak transient pressures. Published burst
pressure ratings for Hose is for manufacturing test purposes only and is no
indication that the Product can be used in applications at the burst pressure or
otherwise above the published maximum recommended working pressure.
2.3
Suction:
Hoses used for suction applications must be selected to
insure that the Hose will withstand the vacuum and pressure of the system.
Improperly selected Hose may collapse in suction application.
2.4
Temperature:
Be certain that fluid and ambient temperatures, both
steady and transient, do not exceed the limitations of the Hose. Temperatures
below and above the recommended limit can degrade Hose to a point where
a failure may occur and release fluid. Properly insulate and protect the Hose
Assembly when routing near hot objects (e.g. manifolds). Do not use any
Hose in any application where failure of th
e Hose could resul
t in the conveyed
fluids (or vapors or mist from the conveye
d fluids) contacting
any open flame,
molten metal, or other potential fire ignition source that could cause burning
or explosion of the conveyed fluids or vapors.
2.5
Fluid Compatibility:
Hose Assembly selection must assure
compatibility of the Hose tube, cover, reinforcement, and Fittings with the
fluid media used. See the fluid compatibility chart in the Parker publication
for the product being considered or used. This information is offered only as
a guide. Actual service life can only be determined by the end user by testing
under all extreme conditions and other analysis.
Hose that is chemically compatible with a particular fluid must be assembled
using Fittings and adapters containing likewise compatible seals.
2.6
Permeation:
Permeation (that is, seepage through the Hose) will occur
from inside the Hose to outside when Hose is used with gases, liquid and gas
fuels, and refrigerants (including but not limited to such materials as helium,
diesel fuel, gasoline, natural gas, or LPG). This permeation may result in
high concentrations of vapors which are potentially flammable, explosive, or
toxic, and in loss of fluid. Dangerous explosions, fires, and other hazards can
result when using the wrong Hose for such applications. The system designer
must take into account the fact that this permeation will take place and must
not use Hose if this permeation could be hazardous. The system designer
must take into account all legal, government, insurance, or any other special
regulations which govern the use of fuels and refrigerants. Never use a Hose
even though the fluid compatibility is acceptable without considering the
potential hazardous effects that can result from permeation through the Hose
Assembly.
Permeation of moisture from outside the Hose to inside the Hose will also
occur in Hose assemblies, regardless of internal pressure. If this moisture
permeation would have detrimental effects (particularly, but not limited to
refrigeration and air conditioning systems), incorporation of sufficient drying
capacity in the system or other appropriate system safeguards should be
selected and used.
2.7
Size:
Transmission of power by means of pressurized fluid varies with
pressure and rate of flow. The size of the components must be adequate to
keep pressure losses to a minimum and avoid damage due to heat generation
or excessive fluid velocity.
2.8
Routing:
Attention must be given to optimum routing to minimize
inherent problems (kinking or flow restriction due to Hose collapse, twisting
of the Hose, proximity to hot objects or heat sources). For additional routing
recommendations see SAE J1273 and ISO 17165-2. Hose Assemblies have a
finite life and if possible, should be installed in a manner that allows for ease
of inspection and future replacement. Rubber Hose because of its relative
short life, should not be used in residential and commercial buildings for HVAC
(
heating, ventilating and air conditioning) applications.
2.9
Environment:
Care must be taken to insure that the Hose and
Fittings are either compatible with or protected from the environment (that
is, surrounding conditions) to which they are exposed. Environmental
conditions including but not limited to ultraviolet radiation, sunlight, heat,
ozone, moisture, water, salt water, chemicals and air pollutants can cause
degradation and premature failure.
2.10
Mechanical Loads:
External forces can significantly reduce Hose
life or cause failure. Mechanical loads which must be considered include
excessive flexing, twist, kinking, tensile or side loads, bend radius, and
vibration. Use of swivel type Fittings or adapters may be required to insure no
twist is put into the Hose. Unusual applications may require special testing
prior to Hose selection.
2.11
Physical Damage:
Care must be taken to protect Hose from wear,
snagging, kinking, bending smaller that minimu
m bend radius
and cutting,
any of which can cause premature Hose failure. Any Hose that has been
kinked or bent to a radius smaller than the minimum bend radius, and any
Hose that has been cut or is cracked or is otherwise damaged should be
removed and discarded.
2.12
Proper End Fitting:
See instructions 3.2 through 3.5. These
recommendations may be substantiated by testing to industry standards
such as SAE J517 for hydraulic applications, or MIL-A-5070, AS1339, or
AS3517 for Hoses from Parker’s Stratoflex Products Division for aerospace
applications.
2.13
Length:
When establishing a proper Hose length, motion absorption,
Hose length changes due to pressure, and Hose and machine tolerances and
movement must be considered.
2.14
Specifications and Standards:
When selecting Hose and Fittings,
government, industry, and Parker specifications and recommendations must
be reviewed and followed as applicable.
2.15
Hose Cleanliness:
Hose components may vary in cleanliness levels.
Care must be taken to insure that the Hose Assembly selected has an
adequate level of cleanliness for the application.
2.16
Fire Resistant Fluids:
Some fire resistant fluids that are to be
conveyed by Hose require use of the same type of Hose as used with
petroleum base fluids. Some such fluids require a special Hose, while a few
fluids will not work with any Hose at all. See instructions 2.5 and 1.5. The
wrong Hose may fail after a very short service. In addition, all liquids but
pure water may burn fiercely under certain conditions, and even pure water
leakage may be hazardous.
2.17
Radiant Heat:
Hose can be heated to destruction without contact by
such nearby items as hot manifolds or molten metal. The same heat source
may then initiate a fire. This can occur despite the presence of cool air
around the Hose.
2.18
Welding or Brazing:
When using a torch or arc welder in close
proximity to hydraulic lines, the hydraulic lines should be removed or shielded