Following is the formula used to derive the minimum hose length given hose bend radius and degree of bend required:
Angle of Bend/360° x 2 π r = Minimum length of hose to make bend.
r = Given bend radius of hose.

Example: To make a 90° bend with 2” I.D. hose.
Given r = 4.5 inches.

90/360° x 2 x 3.14 x 4.5
i.e. .25 x 2 x 3.14 x 4.5 = 7” minimum length of hose to make bend without damage to hose.


The bend radius should always be equal to or greater than the rated minimum bend radius. In case the hose is bent in a smaller radius than the minimum rated radius, it may lead to damage to the hose and result in premature failure.