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.
- B -
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.
- C -
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.
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).
- P -
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.