Determining maximum working pressure of a hose assembly

The maximum dynamic working pressure of the hose assembly is the lesser of the rated working pressure of the hose and the end connections used.

A hose assembly consists of a hose and hose fittings (or hose ends). Each of these three components is rated independently for its maximum working pressure ratings. The hose assembly inherits its maximum working pressure rating from it’s weakest (lowest rated) component.

Example – A Parker hose assembly made crimping a 1/2” SAE inverted flare fitting on to a 1/2” 451TC hose:

  • A Parker 451TC hose with 1/2 “ inside diameter is rated to 3,000 P.S.I.
  • 1/2” SAE inverted flare fitting is rated to 2,000 P.S.I.
  • The hose assembly maximum working pressure is the lesser of the two values – 2,000 P.S.I.

The pressure rating for each hose at each size is published in catalogs and on our hose product pages.

The pressure rating tables of hose end connections are also published in catalogs and in our technical pages.