Aeroflex

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Technicals

Metal Hose Terminology

Annular – A hose profile that is designed so each convolution is a separate circle or ring.

Braid – Woven wire cover placed over hose which prevents elongation of the hose and permits higher working pressure.

Close Pitch – More corrugations per foot, which renders the longest fatigue life and minimum bend radius.

Constant Flexing Bend Radius– The minimum radius to which a hose can be repeatedly bent and render satisfactory flexure life.

Constant Motion – Motion that occurn a regular cyclic basis at a constant travel.

Fittings – Parts attached to the ends of metal hose so that it can be connected to other components. Such as flanges, unions, nipples etc.

Flow Velocity – When the flow velocity exceeds 75 ft./second liquid, 150 ft./second gas in braided hose, as flexible metal liner should be used.

Intermittent Motion – Motion that occurs on a regular or irregular cyclic basis.

Maximum Test Pressure – Maximum pressure hose assemble should be subject to for testing purpose. Based on 150% of the Maximum Working Pressure.

Media – Convey ant in a hose assembly such as gases, liquids, etc.

Operating Conditions – Temperature, Pressure, Media, Motion and Application involved.

Random Motion – Uncontrolled motion that occurs usually from manual handling of hose.

Rated Burst Pressure – Pressure at which hose can be expected to fail. Braid will normally fail before or burst.

Safety Factor – Difference between working pressure and rated burst pressure.

Shock or Pulsating Pressure – Shock, pulsating or surge pressure can cause premature failure of hose.

Static Bend – Minimum centre bend radius to which flexible metal hose may be bent for installation.

Vibration – High frequency, low amplitude motion.

Working Temperature – Temperature to which hose will be subjected during operation.