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A
Abrasion
Damage caused to the hose assembly, externally by being rubbed on another object or internally from the flow of media through the hoseAmbient Conditions
Surrounding conditions the hose assembly is exposed to such as pressure, temperature and corrosionAmplitude of Vibration or Lateral Movement
The distance a hose moves to one side from its installed positionAngular Offset
Bending the hose so the ends are no longer parallelAnnular Corrugation
A series of rings or convulsions at right angle to the centre line of the hoseArmor/Casing
Used to protect the hose and/or to limit bend radiusAttachment
The method used for attaching end fittings on to the hose, eg weldingAxial Motion
Compression or extension along the length of the hose (absorption of movement) -
B
Basket Weave Braid
Wire Strands that are alternately crossed two over and two underBend Radius
The radius of a bend measured from the centre lineBraid
Flexible wire that is weaved together to form a sleeve over the flexible hose, this is done to protect the hose from elongation when under internal pressure, a second layer of braid can be used for higher pressure assembliesBraid Angle
The angle formed by the braid strands along the axis of the hoseBraid Sleeve or Ferrule
A metal ring that goes over the end of the hose and braid that end fittings can be attached toBraid Wear
Friction between braid and hose which can cause wearBraided Braid
Wire strands are firstly braided togetherButt Weld
A form of welding where the ends to be joined are butted up against each other and a joined by a weld -
C
Constant Flexing
Continuous or regular movement, for example if the hose is connected to moving partsCorrosion
Chemical attack of media on a hoseCorrugation/Convolution
Annular or helical flexing member in corrugated hoseCycle Life
How many cycles a hose can go through before it failsCycle Motion
The movement from neutral to extreme position and then back again -
D
Developed Length
The overall length of the assembly including hose and end fittings required for a specific applicationDiamond Weave Braid
Wire strands alternately crossed one over and one underDye Penetrate Test
A non destructive test used to check for surface imperfections such as cracksDynamic Motion
Non continuous controlled motion e.g. thermal expansion -
E
Erosion
The wearing away of convolutions due to the flow of media -
F
Fatigue
Structural failure associated with flexing of the hoseFerrule
A metal ring that goes over the end of the hose and braid that end fittings can be attached toFlat Braid
Has a braid angle greater than 45°Flow Rate
Volume of media passing through the hose in a specific time e.g. gallons per minuteFrequency of Vibration
The rate of vibration or flexure of a hose in a specific time e.g. cycles per minute -
H
Helical Corrugation
A convolution on a hose that is one continuous spiral -
I
Inside Diameter
The distance measured at the closest point either side of the centreline of the hose -
L
Lap Weld
A weld were the edges of the material overlap and are then welded togetherLateral Offset
Bending the hose so the ends are parallelLinear
A sleeve inserted into the hose to protect the corrugations of the hose from abrasion or used for high velocity mediaLive Length
The section of the hose assembly which is able to flexLoop Installation
An installation where the hose is installed in a loop or U shape, this often done where there is movement -
M
Media/Medium
The substance that passes through the hoseMinimum Bend Radius
The smallest radius that a hose can be bent to without suffering permanent damage -
N
Nominal Diameter
Approximate inside diameter -
O
Operating Conditions
Conditions a hose assembly is subjected to such as temperature, pressure and movementOutside Diameter
The distance measured at the furthest point either side of the centreline of the hose -
P
Permanent Bend/Static Bend
A fixed radius bend in a hose assemblyPitch
The distance between the peaks of the convolutionsPly
The number of layers metal used to construct the wallPressure, Atmospheric
The pressure of the atmosphere a sea level which is 14.7 PSIPressure, Deformation
The pressure that the convolutions of a hose become permanently deformedPressure, Maximum Test
The maximum pressure a hose should be subjected to for test purposes without permanently deforming the hosePressure, Maximum Working
The maximum pressure that the hose should work at on a day to day basisPressure, Pulsating
Rapid change in pressure above and below the normal base pressurePressure, Shock
A sudden increase of pressure that can cause a shockwave through the hose permanently damaging itPressure, Static
A constant pressure that does not changePressure, Working
Internal or external pressure imposed on a hose during normal operating conditionsPSIA
Pounds per square inch absolutePSIG
Pounds per square inch gauge -
R
Radial Motion
When a hose is bent in a 180° arc like what is used in vertical and horizontal traveling loopsRandom Motion
Uncontrolled movement of a hose such as what occurs during manual handling -
S
Safety Factor
The relationship between working pressure and burst pressureScale
Refers to oxide or thin coating of media bought on by surface conditions or weldingSeamless
Refers to corrugated metal hose does not have a weld seam down theSquirm
Hose failure where the hose is deformed into a S or U shape as a result of excessive internal pressure on un-braided hose where the ends or restrained, or un-braided hose where the hose has been axially compressed loosening the braid while the hose is pressurisedStatic Bend
A fixed radius bendSteep Braid
Braid with an angle of less than 45°Strand
Individual strands of wire that make up the braidStress Corrosion
A form of corrosion in stainless steel usually associated with chlorides -
T
Temperature Correction Factor
Corrects the pressure rating in higher temperature applications- Torque/Torsion
A force that produces rotation along the longitudinal axis of a hose assembly where one end is fixed
- Torque/Torsion
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V
Vacuum
Negative pressure of suction- Velocity
Speed at which the media flows through the hose - Velocity Resonance
Vibrations of convolutions due to the buffeting of high velocity gas or air flow
- Velocity