Hose Reducer
Hose Reducer
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 25 in X 15 in Brass Fire Hose Reducer  US $15.00
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Improving the service life of your Flexible Hose's
Unlike metal tubing, hose is flexible, so it is used primarily to allow relative motion between components at either end of the hose assembly and to simplify routing and installation. It is much easier to route a hose assembly over, under, around, or through a series of obstacles than it is to bend and install a rigid tubing assembly. Furthermore, replacing a hydraulic line by fabricating a rigid tube assembly often is more costly and time consuming than making a hose assembly.
Most manufacturers offer hose that can be bent to a tighter radius than that published in industry standards. Still bending hose to a smaller radius than recomended should be avoided to avoid shorting the service life of the hose. Therefore, route your hose in a manner that provides ample bend radius.
Because hose is flexible , you must allow for contaction and expansion when cutting the hose to length. Manufacturers state that, depending on its type hose can elongate up to 2% when prssurized, but moreimportantly, can cotract as much as 4%. This length differance can put magor strain on the hose reinforcement wires and eventuallcause failure, espeically at the coupling end.
Bend hose in one direction to avoivod twisting it's wire reinforcment, which would reduce the hose's pressure capability. Manufacturers state that twisting a high-pressure hose only 5% can reduce service life by as much as 70% and at 7% as much as 90%. unfortunatley, hose routing usually occurs lat in the design process, so it some times may be difficult to find an ideal path to route the flexible hose.
Another alternative is to use a single section of hose for each bend and install a hose-to-hose coupling and hose clamp between bends. This technique is less preferred because it not only is more costly and time consuming to perform, but increases the number of potential leak points in the hose assembly. Also, to help ensure that technicians replace and secure hose assemblies properly, include detailed instructions on hose length, use of hose clamps, and special considerations in service manuals.
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