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BULK HOSE |
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Proper selection of metal hose type, its pressure rating and material is crucial to the proper life and function of the hose assembly for your application.
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MDC corrugated hose is a high quality general purpose industrial hose. It is produced in T304 SS, T321 SS, T316L Bronze and Monel.
Custom runs in Hasteloy, Titanium and other formable alloys.
Corrugated hose is manufactured from a cylindrical, thin walled tube formed from rolled strip and joined at the seam by butt welding.
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Impressed into this tube is a corrugated annular profile. Annular corrugated hose has several advantages over helical hose.
It is not subject to damaging torsional stress due to longitudinal expansion resulting from pressure rises. |
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Helical hose is formed in one continuous machine motion. It is generally less flexible than the annular hose, due to lower convolutions profile, but since less material
is used in its fabrication and the manufacturing process is much faster, the cost is generally lower. MDC does not offer helical hose from stock. |
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When the corrugations are closely spaced, the hose is referred to as "standard pitch" hose. When the corrugations are more widely spaced,
the hose is referred to as "open pitch" hose. All information in this section is relevant to standard pitch, annular corrugated hose.
Data on open pitch hose is available upon request.
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The thickness of the metal strip, the height of the corrugations, and the number of corrugations per foot all affect the performance characteristics of metal hose.
Flexibility in corrugated hose is the result of the bending of the metal corrugations. Service life varies depending upon the severity of the flexing, the temperature,
corrosive conditions, pressure, and vibration to which the hose is subjected. |
Unless restrained, corrugated hose will elongate when subjected to increasing internal pressure. This restraint is provided by a braided covering, consisting of a
tubular sheath of woven metal wires fitted tightly over the corrugated hose and secured at each end. Flexibility of the corrugated hose is not appreciably affected by
this wire braid covering. In addition, the braid provides squirm support and dampens vibration.
In higher pressure applications, the use of additional braid covers will provide additional working pressure. Unbraided hose is satisfactory for vacuum and low
pressure applications.
Corrugated hose is recommended for applications involving permanent bends, and in situations where flexing is predictable, that is, machine controlled.
Also, whenever absolute leak prevention is essential, corrugated hose should be selected.
Information concerning assembly nomenclature, selection, installation precautions, lateral offset, angular rotation, pressure and temperature considerations is found in the
ENGINEERING / DESIGN section of this site
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