Hardware:

A loose term used to describe parts of a hose assembly other than the hose and braid, such as fittings, collars and valves.

Helical:

A type of corrugated hose having one continuous convolution resembling a screw thread.

Helical Wire Armor:

To provide additional protection against abrasion under rough operating conditions, metal hoses can be supplied with an external round or oval section wire spiral.

Inside Diameter:

This refers to the free cross section of the hose and (in most cases) is identical to the nominal diameter.

Installation:

The installed geometry of a hose assembly.

Interlocked Hose:
Formed from profiled strip and wound into flexible metal tubing with no subsequent welding, brazing, or soldering, may be made pressure-tight by winding in strands of packing.

Intermittent Bend Radius:

The designation for a radius used for non-continuous operation, usually an elastic radius.

Lap Weld (LW):

Type of weld in which the ends or edges of the metal overlap each other and are welded together.

Liner:

Flexible sleeve used to line the I.D. of hose when the velocity of gaseous media is in excess of 180 ft. per second.

Loop Installation:

The assembly is installed in a loop or “U” shape, and is most often used when frequent and/or large amounts of motion are involved.

Mechanical Fitting or Reusable Fitting:

A fitting not permanently attached to a hose which can be disassembled and used again.

Medium (Singular)/Media (Plural):

The substance(s) being conveyed through a piping system.

Minimum Bend Radius:

The smallest radius to which a hose can be bent without suffering permanent deformation of its convolutions.

Misalignment:

A condition in which two points, intended to be connected, will not mate due to their being laterally out of line with each other.

Nominal Diameter:

The dimensions of a component, it indicates the approximate inside diameter.

Offset – Lateral, Parallel, & Shear:

The amount that the ends of a hose assembly are displaced laterally in relation to each other as the result of connecting two misaligned terminations in a piping system, or intermittent flexure required in a hose application.

Operating Conditions:

The pressure, temperature, motion, media, and environment that a hose assembly is subjected.

Outside Diameter:

The external diameter of a metal hose, measured from the top of the corrugation or braiding.