Slide 1

FLUID LINES AND FITTINGSFlexible Fluid lines: JEPP GEN Chap 10 section B10/28/141CLAUDIO J.MARTINAACM NV

9/17/20142CLAUDIO J.MARTINAFlexible Fluid Lines9/17/2014CLAUDIO J.MARTINA3Flexible Fluid Lines are used to connect parts to movable Areas of high Vibration

Flexible Fluid Lines9/17/2014CLAUDIO J.MARTINA4Types of Flexible Hoses Depend on their designDepends on their applicationDepends on the different fluids used.Depends on the pressure rangeDepends on the fitting used.Flexible Fluid Lines9/17/2014CLAUDIO J.MARTINA5Flexible Hoses constructionInner liners covered with layers of reinforcement to provide strengthOuter cover to protect for physical damage.Material and manufacturing process determine suitability of specific hoseFlexible Fluid Lines9/17/2014CLAUDIO J.MARTINA6

Mil specManf. NoHose size I.D in 1/16 Quarter and year of manuf.laylineFlexible Fluid Lines9/17/2014CLAUDIO J.MARTINA7INNER LINERCarries the fluidMUST HAVE :Minimum porosityChemically compatibility with the material.Flexible Fluid Lines9/17/2014CLAUDIO J.MARTINA8 LINER must offerLeast resistance to flowRemain flexible throughout full range of operating temperature.Flexible Fluid Lines9/17/2014CLAUDIO J.MARTINA9 MATERIAL USED FOR INNER LINERSSYNTHETIC COMPOUNDSNEOPRENEBUTA-NBUTYLTEFLON

Flexible Fluid Lines9/17/2014CLAUDIO J.MARTINA10

Flexible Fluid Lines9/17/2014CLAUDIO J.MARTINA11NEOPRENE

Sort of synthetic rubber that is abrasion resistantUsed with petroleum based fluid.Flexible Fluid Lines9/17/2014CLAUDIO J.MARTINA12BUNA-N

Synthetic rubber compound used to carry petroleum based products BUNA-N is better for petroleum products than Neoprene

Flexible Fluid Lines9/17/2014CLAUDIO J.MARTINA13BUTYL

Synthetic rubber compound made from petroleum raw materials .Will brake down if used with petroleum products.Butyl is excellent for inner liners for fluid lines carrying phosphate ester Base hydraulic fluids ( such as Skydroll)

Flexible Fluid Lines9/17/2014CLAUDIO J.MARTINA14TEFLON = TRADENAME

Has a broad operating temperature range( -65degrees f to + 450 degrees f)Is compatible with nearly every fluid

TEFLON Lines9/17/2014CLAUDIO J.MARTINA15WARNINGWHEN ISTALLING TEFLON HOSES ALWAYS OBSERVE MINIMUM BEND RADIUS RESTRICTIONSTEFLON WILL TAKE A SET AFTER IN SERVICE TIME AND BECOMES SOMEWHAT RIGID.DO NOT BEND AGAINST SET AFTER REMOVAL

TEFLON Lines9/17/2014CLAUDIO J.MARTINA16WARNINGSOME HOSES ARE SHIPPED WITH A PRE-SET SHAPE.A WIRE IS HOLDING THE ASSEMBLY IN THE PRESET SHAPE.KEEP THE ASSEMBLY IN THAT POSITION UNTIL IT ASSEMBLED.

Flexible Fluid Lines9/17/2014CLAUDIO J.MARTINA17REINFORCEMENT LAYER

IT DETERMINES THE STRENGTH OF THE HOSE.

Flexible Fluid Lines9/17/2014CLAUDIO J.MARTINA18COMMON REINFORCEMENT LAYER MATERIALCOTTONRAYONPOLYESTER FABRICCARBON STEEL WIRESTAINLESS STEEL WIRE BRAID

Flexible Fluid Lines9/17/2014CLAUDIO J.MARTINA19 REINFORCEMENT LAYER

ALL HOSES HAVE TEDENCY TO INCREASE IN DIAMETER AND DECREASE IN LENGTH WHEN PRESSURE IS APPLIED.THE DESIGN OF REINFORCEMENT LAYER IS CRITICAL AS IT CAN INFLUENCE THIS CHARACTERISTIC.

Flexible Fluid Lines9/17/2014CLAUDIO J.MARTINA20OUTER COVERPROTECTIVE COVER MADE OF IMPREGNATED RUBBER

IT IS PUT OVER THE REINFORCEMENT TO PROTECT THE HOSE FROM PHYSICAL DMAGE.

Flexible Fluid Lines9/17/2014CLAUDIO J.MARTINA21ALL OUTER COVERS OF FLEXIBLE LINES MARKED WITH A LAY LINE.YELLOW-RED OR WHITE STRIPE ; RUNNING THE LENGTH OF THE HOSE.ALSO IDENTIFICATION OF THE HOSE:MIL SPEC NOMANUFACTURERS NAMESYMBOLDASH NO. = HOSE SIZEALSO : Manufacturers part no , year and quarter the hose was manufactured..

Flexible Fluid Lines9/17/2014CLAUDIO J.MARTINA22LAY LINE SHOWS:

IF A HOSE IS TWISTED WHEN IT IS INSTALLED .IF A HOSE IS PROPERLY INSTALLED , THE LAY LINE RUNS STRENGTH , WITH NO TWIST.A TWIST PUT STRESS ON THE HOSE.

Flexible Fluid Lines9/17/2014CLAUDIO J.MARTINA23TYPES OF FLEXIBLE HOSES

CLASSIFIED BY AMOUNTH OF PRESSURE TO WITHSTAND.LOW PRESSUREMEDIUM PRESSUREHIGH PRESSURE

Flexible Fluid Lines9/17/2014CLAUDIO J.MARTINA24LOW PRESSURE HOSEAIRVACUUM HOSES

SEAMLESS INNER TUBESREINFORCED WITH SINGLE LAYER OF COTTON.

Flexible Fluid Lines9/17/2014CLAUDIO J.MARTINA25MEDIUM PRESSURE HOSESFLUID PRESSURES UP TO 3000 PSIMAXIMUM OPERATING PRESSUE VARIES WITH DIAMETERSmaller sizes carry up to 3000 psiLarger sizes are restricted to lower pressure.If the hose is used with petroleum based fluid, inner liner is made of sysnthetic rubber and outer braid is grey blackIf Phosphate ester base (skydrol) is used the inner liner is made of synthetic butyl rubber

Flexible Fluid Lines9/17/2014CLAUDIO J.MARTINA26HIGH PRESSURE HOSES

MAX OPERATING PRESSURE 3000 PSISYNTHETIC RUBBER LINER FOR PETROLEUM PRODUCTSTO DESTINGUISH MEDIUM PRESSURE HOSE FROM HIGH PRESSURE HOSE:HIGH PRESSURE HOSE IS BLACK WITH YELLOW LAY LINE.HOSE DESIGNED FOR SKYDROLL HAS BUTYL RUBBER INNER LINE AND A GREEN COVER WITH A WHITE LAYER LINE.

Flexible Fluid Lines9/17/2014CLAUDIO J.MARTINA27REPLACING FLEXIBLE HOSEEVERY REGULAR INSPECTION INTERVAL HOSE ASSEMBLIES SHOULD BE CHECKED FOR DETORIATIAN.INDICATIONS OF LEAKAGEMECHANICAL DAMAGESEPARATION OF BRAID FRO, COVERAGEBROKEN WIRE BRAID

Flexible Fluid Lines9/17/2014CLAUDIO J.MARTINA28SIZE DESIGNATIONFLEXIBLE SIZE DETERMINED BY INSIDE DIAMETER IN INCREAMENTS OF 1/16 DASH NUMBER INDICATES TUBE DIAMETER

-10 = 10/16 = 5/8 DIAMETER HOSE.

Flexible Fluid Lines9/17/2014CLAUDIO J.MARTINA29

Flexible Fluid Lines9/17/2014CLAUDIO J.MARTINA30FITTINGS ARE CLASSIFIED

THE WAY THEY ARE ATTACHEDTHE AMOUNT OF PRESSURE THEY CAN WITHSTAND

Flexible Fluid Lines9/17/2014CLAUDIO J.MARTINA31SWAGED FITTINGS

CANNOT BE REMOVED AND RE-USEDMUST BE OBTAINED FROM MANUFACTURER OR A PROPERLY HOSE ASSEMBLY SHOP

Flexible Fluid Lines9/17/2014CLAUDIO J.MARTINA32REUSABLE FITTINGS

SOCKETNIPPLENUT

Flexible Fluid LinesFlexible hose installation :Check in manual if a flexible hose can be used.On hose Idenfication Plate :Check the cure date assembly datePart noCure date Assembly date9/17/2014CLAUDIO J.MARTINA33Flexible Fluid Lines

9/17/2014CLAUDIO J.MARTINA34Flexible Fluid Lines

9/17/2014CLAUDIO J.MARTINA35Flexible Fluid Lines

9/17/2014CLAUDIO J.MARTINA36Flexible Fluid Lines

9/17/2014CLAUDIO J.MARTINA37Flexible Fluid Lines

9/17/2014CLAUDIO J.MARTINA38Flexible Fluid Lines9/17/2014CLAUDIO J.MARTINA39

Flexible Fluid Lines9/17/2014CLAUDIO J.MARTINA40

Flexible Fluid LinesLAY LINE

TWISTING OF TE LAYLINE IS AN INDICATION OF STRAIN ON THE LINE.THE HOSE MUST BE SUPPORTED EVERY 24 INCHESFLEXIBLE LINES MUST NEVER BE STRETCHED TIGHTLY BETWEEN TWO FITTINGS.

9/17/2014CLAUDIO J.MARTINA41Flexible Fluid LinesSUITABLE FIRE SHIELD:USED WHERE FLEXIBLE HOSE MUST BE PROTECTED FOR WEAR, CAUSED BY ABRASION OR EXTREME HEAT.PROTECTIVE SLEEVES HEATSHRINKNYLON SPIRAL WRAPTEFLON9/17/2014CLAUDIO J.MARTINA42Flexible Fluid LinesREF : Jeppeson general chap 10 BBook 7 module 7 page 189Book 2 of module 6 ; fastening devices pipelines

Recommendation: Google aircraft fluid line : read fliid line and fitting practise quiz9/17/2014CLAUDIO J.MARTINA43EASA REQUIREMENT9/17/2014CLAUDIO J.MARTINA44

EASA REQUIREMENT9/17/2014CLAUDIO J.MARTINA45

Flexible Fluid LinesThank You

9/17/2014CLAUDIO J.MARTINA46