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Catalog 3501E 2.8 Routing: Attention must be given to optimum routing to minimize inherent problems (kinking or3.9 Securement: In many applications, it may be necessary to restrain, protect, or guide the Hose to flow restriction dueto Hose collapse, twisting of the Hose, proximity to hot objects or heatprotect it from damage by unnecessary flexing, pressure surges, and contact with other sources). mechanicalcomponents. Care must be taken to insure such restraints do not introduce additional 2.9 Environment: Care must be taken to insure that the Hose and Fittings are either compatible withstress or wear points. or protected from the environment (that is, surrounding conditions) to whichtheyare exposed.3.10 ProperConnection of Ports: Proper physical installationof the Hose Assembly requires a Environmental conditions including but not limited to ultraviolet radiation, sunlight, heat, ozone,correctlyinstalled portconnection insuring that no twist or torqueistransferred to theHose when moisture, water, salt water, chemicals, and air pollutants can cause degradation and prematurethe Fittings are beingtightened orotherwiseduring use. failure. 3.11 External Damage: Proper installation is not complete without insuring thattensile loads, side 2.10 Mechanical Loads: External forces can significantly reduce Hose life or causefailure.loads, kinking, flattening, potential abrasion, thread damage, or damage to sealing surfaces are Mechanicalloads which must be considered include excessive flexing, twist, kinking, tensile orcorrected or eliminated. See instruction 2.10. side loads, bend radius, andvibration. Use of swivel type Fittings or adapters maybe required to3.12 System Checkout: All air entrapment must beeliminated and the system pressurized to the insure no twist is put into theHose. Unusual applications may require special testing prior to Hosemaximum systempressure (at or below the Hose maximum working pressure)and checked for selection. proper function andfreedom from leaks. Personnel must stay outof potential hazardousareas 2.11 Physical Damage: Care must be taken toprotect Hose from wear, snagging, kinking, bendingwhile testing and using. smaller that minimumbend radius, andcutting, any of which can cause prematureHose failure.3.13 Routing: The Hose Assembly should be routed insuch a manner so if a failure doesoccur, the Any Hose that has been kinked or bent toa radius smaller thanthe minimumbend radius, andescaping media will not cause personal injury or property damage. In addition, iffluid media any Hose that hasbeen cut or is cracked or is otherwise damaged, should be removed andcomes in contact with hot surfaces, openflame, or sparks, a fire or explosion may occur. See discarded. section 2.4. 2.12 ProperEnd Fitting: See instructions 3.2 through 3.5. These recommendations may be4.0 HOSE AND FITTING MAINTENANCE ANDREPLACEMENT INSTRUCTIONS substantiated by testing to industry standards such as SAE J517 for hydraulic applications, or MIL-4.1 Even with properselection and installation, Hose life may be significantly reduced without a A-5070, AS1339,or AS3517 forHoses from Parker's Stratoflex Products Division for aerospacecontinuing maintenance program. The severity of theapplication, risk potential from a possible applications. Hose failure, and experience with anyHose failures in the application or in similar applications 2.13 Length: When establishing a properHose length, motion absorption, Hose length changesdue toshould determine the frequencyof the inspection and the replacementfor the Products so that pressure, and Hose and machine tolerances and movement must be considered.Products are replaced before any failure occurs. A maintenance program must be established and 2.14 Specifications and Standards: When selecting Hose and Fittings, government, industry, andfollowed by the user and,at minimum, must include instructions 4.2 through 4.7. Parker specificationsand recommendations must be reviewed and followed as applicable.4.2 Visual Inspection Hose/Fitting: Any of the following conditions require immediate shutdown and 2.15 Hose Cleanliness: Hose components may vary in cleanliness levels. Care must be taken toreplacement of the HoseAssembly: insure that theHose Assembly selected has an adequate level of cleanliness for the application.� Fitting slippage on Hose, 2.16 Fire Resistant Fluids: Some fire resistantfluids thatare to be conveyed by Hose require use of� Damaged, cracked,cut or abradedcover (any reinforcement exposed); the same type of Hose as used with petroleum base fluids. Some such fluids require a special� Hard, stiff, heat cracked, or charred Hose; Hose, while a fewfluids willnot work with any Hose at all. See instructions 2.5 and1.5. The� Cracked, damaged, or badly corroded Fittings; wrong Hosemayfail after a very short service. In addition, all liquids but pure water may burn� Leaks atFitting or in Hose; fiercely under certain conditions, and even pure water leakage may behazardous.� Kinked, crushed, flattened or twisted Hose; and 2.17 Radiant Heat: Hose can be heated to destruction without contact by suchnearby items as hot� Blistered, soft, degraded, or loose cover. manifolds or molten metal. The same heat source may then initiate a fire. This can occur despite4.3 Visual Inspection All Other: The following items must betightened, repaired, corrected or the presence of cool air around theHose. replaced as required: 2.18 Welding or Brazing: When using atorch or arc-welder in close proximity to hydraulic lines, the� Leaking port conditions; hydraulic lines should be removed or shielded with appropriate fire resistant materials. Flame or� Excess dirt buildup; weld spatter could burnthrough the Hose and possibly ignite escaping fluid resulting in a� Worn clamps, guards or shields; and catastrophic failure. Heating of plated parts, including Hose Fittings and adapters, above 450�F� System fluid level, fluid type, andany air entrapment. (232�C) such as during welding, brazing,or soldering may emit deadly gases.4.4 FunctionalTest: Operate the system at maximum operating pressure and check for possible 2.19 Atomic Radiation: Atomic radiation affects all materials used in Hose assemblies. Since themalfunctions and leaks. Personnel must avoidpotential hazardous areas while testing andusing long-term effects may be unknown, do not expose Hose assemblies to atomic radiation.the system. See section 2.2. 2.20 Aerospace Applications: Theonly Hose and Fittings that may be usedfor in flightaerospace4.5 Replacement Intervals: Hose assemblies and elastomeric seals used on Hose Fittingsand applications are tHose availablefromParker'sStratoflex ProductsDivision. Do not use any otheradapters will eventually age, harden, wear and deteriorate under thermal cycling and compression Hose or Fittings for in flight applications. Do not use anyHose or Fittings from Parker's Stratoflexset. Hose Assemblies and elastomeric seals should be inspected and replaced atspecific Products Division with any other Hose or Fittings, unless expressly approved in writing by thereplacement intervals,based on previous service life,government or industry recommendations, engineering manager orchief engineer of Stratoflex Products Division andverified by the user'sor when failures could result inunacceptable downtime, damage, or injury risk. See section 1.2. own testing and inspection to aerospace industry standards. 4.6 Hose Inspection and Failure: Hydraulic powerisaccomplished by utilizing high-pressure fluids 2.21 Unlocking Couplings: Ball lockingcouplings or other couplings with disconnectsleeves canto transfer energy and do work. Hoses, Fittings,and HoseAssemblies all contribute to thisby unintentionally disconnect if they are dragged over obstructions or if the sleeve is bumped ortransmitting fluids at highpressures. Fluids under pressurecan bedangerous and potentially moved enough to cause disconnect. Threaded couplings should be considered where there is alethal and, therefore, extreme caution must beexercised when working with fluids under pressure potentialfor accidentialuncoupling. and handling the Hoses transporting the fluids. From time to time, Hose Assemblies will fail if they 3.0 HOSE AND FITTING ASSEMBLYAND INSTALLATION INSTRUCTIONS are not replaced atproper time intervals. Usually thesefailures are the result ofsome form of 3.1 Component Inspection: Prior to assembly, a careful examination of the Hose and Fittings mustmisapplication, abuse, wear, or failure to perform proper maintenance. When Hoses fail, generally be performed. All components must be checkedfor correct style, size, catalognumber, and length.the high-pressure fluids inside escape in a stream which may or may not bevisible to the user. The Hose mustbe examinedfor cleanliness, obstructions, blisters, cover looseness, kinks, cracks,Under no circumstances should the user attempt to locatethe leak by "feeling" with their hands or cuts or any other visible defects. Inspect the Fittingand sealing surfaces for burrs, nicks, corrosionany other part of their body. High-pressure fluids can and will penetrate the skin and cause severe or other imperfections. Do NOT use any component that displays any signs of nonconformance.tissue damage and possibly loss of limb. Even seemingly minorhydraulic fluid injection injuries 3.2 Hose and Fitting Assembly: Do not assemble a Parker Fitting on a Parker Hose that is notmust be treated immediately by a physician with knowledge of thetissue damaging properties of specifically listed by Parker for that Fitting, unless authorized in writing by the engineeringhydraulic fluid. manager or chief engineer of the appropriate Parker division. Do not assemble a Parker Fitting onIf a Hose failure occurs, immediately shut down the equipment and leave the area until pressure another manufacturers Hose or a Parker Hose on another manufacturers Fittingunless (i) thehas been completely released from the Hose Assembly. Simply shutting down the hydraulic pump engineering manager or chief engineer of the appropriate Parker division approves the Assemblymay or may not eliminate the pressure in the Hose Assembly. Manytimes check valves, etc., are in writing or that combination is expressly approved in the appropriate Parker literature for theemployed in a systemand can cause pressure to remain in a Hose Assembly even when pumps specific Parker product, and (ii) the user verifies the Assembly and the applicationthrough analysisor equipment are not operating. Tiny holes in the Hose, commonly known as pinholes,can eject and testing. For Parker Hose that does not specify a Parker Fitting, the userissolely responsiblesmall, dangerouslypowerful but hard to see streams of hydraulic fluid. It may take several minutes for the selection of the proper Fitting and Hose Assembly procedures. See instruction 1.4.or even hoursfor the pressure to be relieved so that the Hose Assembly may be examined safely. The Parker published instructions must be followed for assembling the Fittings on the Hose. TheseOnce thepressure has been reduced to zero, the Hose Assembly may be taken off the equipment instructions are provided in the Parker Fitting catalog for the specific Parker Fitting being used, orand examined. It must always be replaced ifa failure has occurred. Never attempt to patch or by calling 1-800-CPARKER, or at www.parker.com. repair a Hose Assembly that has failed. Consult the nearest Parker distributor or the appropriate 3.3 Related Accessories: Do not crimp or swage any Parker Hose or Fitting with anything but theParker division for Hose Assembly replacement information. listed swage or crimp machine and dies in accordance with Parker published instructions. Do notNever touchor examine a failed Hose Assembly unless itisobviousthat the Hose no longer crimp or swage another manufacturers Fitting with a Parker crimp or swage die unless authorizedcontains fluid under pressure. The high-pressure fluid is extremely dangerous and can cause in writing by the engineering manager of chief engineer of theappropriate Parker division.serious and potentially fatal injury. 3.4 Parts: Do not useany Parker Fitting part (including but not limited to socket, shell,nipple, or4.7 Elastomeric seals: Elastomeric seals will eventually age, harden, wear and deteriorateunder insert) except with the correct Parker mating parts, in accordance with Parker publishedthermal cycling and compression set. Elastomeric seals should be inspected and replaced. instructions, unless authorized in writing by the engineering manager or chief engineer ofthe4.8 Refrigerant gases: Special care should be taken when working with refrigeration systems. appropriate Parker division. Sudden escape of refrigerant gases cancause blindness if the escaping gases contact the eye 3.5 Reusable/Permanent: Do not reuseany field attachable(reusable) Hose Fitting that has blown orand can cause freezing or other severe injuriesif it contactsany other portion of the body. pulled off a Hose. Do not reuse a Parker permanent Hose Fitting (crimped or swaged) or any part4.9 Compressednatural gas (CNG): Parker CNG HoseAssemblies should betestedafter thereof. Complete Hose Assemblies may only bereused after proper inspection undersection 4.0.installation and before use,and at least ona monthly basis per AGA 1-93 Section 4.2 "Visual Do not assembleFittings to any previously used hydraulic Hose that was in service, for use in aInspection Hose/Fitting". The recommended procedure is to pressurize the Hose and check for fluid power application. leaks and to visually inspect the Hose for damage. 3.6 Pre-Installation Inspection: Prior toinstallation, a careful examination ofthe HoseAssemblyCaution: Matches, candles, open flame or other sourcesof ignition shall notbe used for Hose must be performed. Inspect the Hose Assembly for any damage or defects. Do NOT use anyinspection. Leak check solutions should be rinsed off after use. Hose Assembly that displays any signs of nonconformance. N 3.7 Minimum Bend Radius: Installation of a Hose at less than theminimum listed bend radius may significantly reduce the Hose life. Particular attention must be given to preclude sharp bending at the Hose to Fitting juncture. Any bending during installation atless thanthe minimum bend radius must be avoided. If any Hose is kinked during installation, the Hose must bediscarded. 3.8 TwistAngle and Orientation: Hose Assembly installation mustbe such that relative motion of machine components does not produce twisting. Parker Hannifin Corporation N11 Parker Brass Products Division Otsego, Michigan
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