Accelerated life test : A method designed to approximate in a short time the deteriorating effects obtained under normal service conditions.
Acid resistant : Having the ability to withstand the action of identified acids within specified limits of concentration and temperature.
Adapter : Fittings of various sizes and materials used to change an end fitting from one type to another type or one size to another.
Adhesion : The strength of bond between cured rubber surfaces or between a cured rubber surface and a non-rubber surface.
Adhesion failure : (1) the separation of two bonded surfaces at an interface by a force less than specified in a test method; (2) the separation of two adjoining surfaces due to service conditions.
Adhesive : A material which, when applied, will cause two surfaces to adhere.
Ambient temperature : The temperature of the atmosphere or medium surrounding an object under consideration.
Ambient/atmospheric conditions : The surrounding conditions, such as temperature, pressure, and corrosion, to which a hose assembly is exposed.
Application : The service conditions that determine how a hose assembly will be used.
Assembly : A general term referring to any hose coupled with end fittings of any style attached to one or both ends.
ASTM : American Society for Testing and Materials.
Attachment : The method of securing an end fitting to a hose (e.g., banding, crimping, swaging, or screw-together-2 piece or 3 piece-style-reusable fittings).
Autoclave : An apparatus using superheated high pressure steam for sterilization, vulcanization and other processes.
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Bend radius : The radius of the bent section of hose measured the the innermost surface of the curved portion.
Braid : The woven portion of a hose used as reinforcement to increase pressure rating and add hoop strength. Various materials such as polyester, cotton or metal are used. A hose may have one or more braids, outside or between layers of hose material.
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C of C : Certificate on conformance or certificate of compliance; a document, typically signed and dated pertaining to a particular lot of purchase order on item(s), which describes any standards, specifications, tests, materials and/or performance attributes to which the referenced item(s) have met or will meet.
Cam & Groove : A type of fitting that allows connection and disconnection by means of arm(s) or cam(s) on the female fitting. The seal is accomplished by means of a gasket, available in various materials. These fittings are frequently used on product transfer hose assemblies.
Cemented end : A hose end sealed with the application of a liquid coating.
Chemical compatibility : The relative degree to which a material may contact another without corrosion, degradation or adverse change of properties.
Chemical resistance : The ability of a particular polymer, rubber compound, or metal to exhibit minimal physical and/or chemical property changes when in contact with one or more chemicals for a specified length of time, at specified concentrations, pressure and temperature.
Clamp : A device used to hold a hose onto a fitting.
Compound : The mixture of rubber or plastic and other materials, which are combined to give the desired properties when, used int he manufacturing of a product.
Conductive : The ability to transfer electrical potential.
Convolution count : The number of ridges or corrugations per inch of a hose.
Convolution/corrugation : The annular or helical flexing member in corrugated or strip wound hose/corrugation.
Corrosion : The process of material degradation by chemical or electrochemical means.
Corrugated hose : Hose with a carcass fluted, radially or helically, to enhance its flexibility or reduce its weight.
Coupler : The female portion of the cam & groove connection with the cam arms.
Coupling : A frequently used alternative term for fitting.
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Durometer : An instrument for measuring the hardness of rubber and plastic compounds.
Durometer hardness : A numerical value, which indicates the resistance to indentation of the blunt indentor of the durometer.
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Elastomer : Any one of a group of polymeric materials, usually designated thermoset, such as natural rubber, or thermoplastic, which will soften the application of heat.
Electrostatic discharge : The sudden discharge of static electricity form an area of buildup to a grounding point.
Elongation : The increase in length expressed numerically as a percentage of the initial length.
Enlarged end : An end having a bore diameter greater than that of the main body of the hose, in order to accommodate a larger fitting.
EPDM : Ethylene Propylene Diene Monomer; an elastomer.
Extrude/extruded/extrusion : Forced through the shaping die of an extruder; extrusion may have a solid or hollow cross section.
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Fatigue : The weakening or deterioration of a material occurring when a repetitious or continuous application of stress causes strain, which could lead to failure.
Oil resistance : The ability of the materials to withstand exposure to oil.
Operating conditions : The pressure, temperature, motion, and environment to which a hose assembly is subjected.
Overall length (OAL) : The total length of a hose assembly, which consists of the free hose length plus the length of the coupling(s).
Ozone resistance : The ability to withstand the deteriorating effects of ozone (generally cracking).
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Permeation : The process of migration of a substance into and through another, usually the movement of a gas into and through a hose material; the rate of permeation is specific to the substance, temperature, pressure and the material being permeated.
Pitch : 1) The distance from one point on a helix to the corresponding point on the next turn of the helix, measured parallel to the axis.
2) The distance between the two peaks of adjacent corrugation or convolution.
Plain ends : Fitting ends without threads, groove, or a bevel typically used for welding, as in a flange.
Profile : Used in reference to the contour rolled into strip during the process of manufacturing strip wound hose, or the finished shape of a corrugation/convolution.
PVC : Polyvinyl chloride. A low cost thermoplastic material typically used in the manufacturing of industrial hoses.
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Reinforcement : The strengthening members, consisting of either fabric, cord, and/or metal, of a hose.
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Smooth bore : A term used to describe the type of innercore in a hose.
Soft end : A hose end in which the rigid reinforcement of the body, usually wire, is omitted.
Specification : A document setting forth pertinent details of a product.
Spiral : A method of applying reinforcement in which there is not interlacing between individual strands of the reinforcement.
Static conductive : Having the capability of furnishing a path for a flow of static electricity.
Static wire : Wire incorporated in a hose to conduct static electricity.
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Tape wrapped convoluted : A type of flexible hose incorporating layers of tape to form helical ridges and grooves.
Tear resistance : The property of a rubber tube or cover of a hose to resist tearing forces.
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Vacuum formed convoluted : Smooth bore hose that is made flexible by the formation of ridges and grooves during a process that utilizes heat and vacuum to mechanically form convolutions.
Vacuum resistance : The measure of a hoses ability to resist negative gauge pressure.
Vulcanization : A process during which a rubber compound, through a change in its chemical structure, improves or extends elastic properties over a greater range of temperature.
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Weathering : The surface deterioration of a hose cover during outdoor exposure, as shown by checking, cracking, crazing and chalking.
Wire reinforced : A hose containing wires to give added strength, increased dimensional stability; crush resistance.
Working temperature : The temperature range of the application, may include the temperature of the fluid conveyed of the environmental conditions the assembly in exposed to in use.