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2.6 Permeation: Permeation (that is, seepage through the hose) will occur from inside the hose to the outside environment when hose is used with gases, liquid and gas fuels, and refrigerants (including but not limited to such materials such as helium, fuel, oil, natural gas or freon). This permeation may result in high concentrations of vapours which are potentially flammable, explosive, or toxic, and in loss of fluid. You must take into account the fact that permeation will occur and could be hazardous.
Permeation of moisture from the outside environment to inside the hose will also occur. If this moisture permeation would have detrimental effects (particularly for, but not limited to, refrigeration and air conditioning systems), incorporation of appropriate system safeguards should be selected and used. Rubber hoses should not be painted without consulting RYCO first.
2.7 Size: Transmission of power by means of pressurised fluid varies with pressure and rate flow. The size of the components must be adequate to keep pressure losses to a minimum and avoid damage due to heat generation of excessive fluid velocity.
2.8 Routing: Attention must be given to optimum routing to minimise inherent problems.
2.9 Environment: Care must be taken to ensure that the hose and fittings are either compatible with or protected from the environment to which they are exposed including but not limited to ultraviolet radiation, sunlight, heat, ozone, moisture, water, salt water, chemicals and air pollutants.
2.10 Mechanical Loads: Consideration must be given to excessive flexing, twist, kinking, tensile or side loads, bend radius, and vibration. Use of swivel type fittings or adaptors may be required.
2.11 Physical Damage: Care must be taken to protect hose from wear, snagging and cuts.
2.12 Proper End Fittings: See instructions 3.2 through 3.5. These recommendations may be substantiated by testing to
industry standards.
2.13 Length: When establishing a proper hose length; motion absorption, hose length changes due to pressure, and hose and machine tolerances must be considered.
2.14 Specifications and Standards: When selecting hose and fittings; government, industry, and RYCO 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 ensure that the assembly selected has an adequate level of cleanliness for the application.
2.16 Fire Resistant Fluids: Some fire resistant fluids require the same hose as used with petroleum oil. Some use a special hose, while a few fluids will not work with any hose at all. See General Instructions 1.5 and Hose and Fitting Selection Instructions 2.5.
2.17 Radiant Heat: Hose can be heated to destruction without contact by nearby items such as hot manifolds or molten metal.
2.18 Welding and Brazing: Heating of plated parts, including hose fittings and adaptors, above 232°C (450°F) such as
during welding, brazing, or soldering may emit deadly gases.
2.19 Atomic Radiation: Atomic radiation affects all materials used in hose assemblies. Do not expose hose assemblies to atomic radiation.
3.1 Pre-Installation Inspection: Prior to installation, a careful examination of the hose assembly must be performed. All components must be checked for correct style, size, and length. The hose must be examined for cleanliness, obstructions, blisters, cover looseness, or any other visible defects.
3.2 Hose and Fitting Assembly: Do not assemble a RYCO fitting on a RYCO hose that is not specifically listed for
that fitting by RYCO. Do not assemble RYCO fittings on another manufacturer’s hose or a RYCO hose on another manufacturer’s fitting unless RYCO approves the assembly in writing, and the user verifies the assembly and the application through analysis and testing. See instruction 1.4. The RYCO published instructions must be followed for assembling the fittings on the hose. These instructions are provided in the RYCO catalogue.
3.3 Related Accessories: Do not crimp or swage any RYCO hose or fitting with anything but the proper RYCO swage machine or crimp machine and in accordance with RYCO published instructions. Do not crimp or swage another manufacturer’s hose fitting with a RYCO crimp machine or swage machine unless authorised in writing by RYCO.
3.4 Safety Equipment: During fabrication, use proper safety equipment, including eye protection, respiratory protection, and adequate ventilation.
3.5 Reuse of Hose and Fittings: Damaged hoses or hose fittings shall not be used.
3.6 Assembly inspection: After assembly, hose assemblies shall be inspected for visible defects and interior obstructions,
such as tube bulges, etc.
3.7 Marking: Hose assemblies shall be marked in accordance with any relevant standards.
3.8 Parts: Do not use any RYCO hose or fitting part unless used with the correct RYCO mating parts, in accordance with published instructions, unless authorised in writing by RYCO.
3.9 Field Attachable/Permanent: Field Attachable couplings may be reattached once only after their first use, provided that they have not been part of a hose assembly that has failed, and are in a fit condition for reuse. Do not reuse any field attachable hose coupling that has blown or pulled off a hose. Do not reuse any permanent (that is, crimped or swaged) hose fittings or any part thereof.

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