Common Hose Application Terms

As application experts, we have listed some common industry terminology to help you determine the right product for your specific application.

Bend Radius Definitions

Bend radius (silicone hose and all rubber hose)

The radius of a bent section of hose measured to the innermost surface of the curved portion.

Minimum bend radius

The smallest radius at which a hose can be used. Dynamic bend radius The radius at which constant or continuous flexing occurs.

Static bend radius

The smallest fixed radius at which a hose can be subjected.

Force to bend
The amount of stress required to induce bending around a specified radius. Hence, a measure of stiffness.

Silicone tube bend radius.

Bend Radius (all, except metal hose) = R1

Pressure Definitions

Maximum rated working pressure
The maximum pressure that the hose should be subjected to on a continuous basis.

Nominal rated burst pressure
The average pressure at which the core or braid will rupture at ambient temperature. This is usually tested at 68"F.

Pulsating or shock pressure
The performance of hose can be greatly reduced under pulsating working pressure. Pressures are normally reduced by 50% in pulsating or shock pressure applications.

Pressure/temperature correction
Silicone and rubber hose pressure capabilities decrease as the temperature increases.

Pressure drop
The measure of pressure reduction or loss over a specific length of hose.

Measuring Hose Assemblies

Straight sanitary x straight sanitary

Length face to face.
Hose length face to face.

Straight sanitary x 45° elbow sanitary

Face of straight sanitary to centerline of 45° elbow sanitary.
Face of straight sanitary to centerline of 45° elbow sanitary.

Straight sanitary x 90° elbow

Face of straight sanitary to centerline of 90° elbow sanitary.
Face of straight sanitary to centerline of 90° elbow sanitary.

90° sanitary elbow x 90° sanitary elbow

90' elbow centerline to 90° elbow centerline (see rotation notes).
90' elbow centerline to 90° elbow centerline.

45° sanitary elbow x 45° sanitary elbow

45° elbow centerline to 45° elbow centerline (see rotation notes).
45° elbow centerline to 45° elbow centerline.

45° sanitary elbow x 90° sanitary elbow

45° elbow centerline to 90° elbow centerline (see rotation notes).
45° elbow centerline to 90° elbow centerline.

Rotation Notes

When ordering double elbow hose assemblies, angular orientation between the elbows is expressed in a decimal. The angle is measured counter-clockwise from the centerline of the nearest fitting when the fitting is positioned at 6 o'clock to the centerline of the other fitting as shown.
90 double elbow detail.