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Three Key Words in Hydraulic Hose Sizing: I.D., Dash Size and Nomogram

Views:24     Author:Site Editor     Publish Time: 2021-06-18      Origin:Site

Three Key Words in Hydraulic Hose Sizing: I.D., Dash Size and Nomogram

Sizing is the most basic and essential factor in hydraulic hose selection. Sizing specifications for hydraulic hose include inner diameter, outer diameter, and length.

Outer diameter (O.D.) measures the entire span of the hose cross-section, including the tube, reinforcement, and cover. The difference between the O.D. and I.D. is the thickness of the hose wall. Outer diameter is important for sizing industrial hose to appropriate fittings and system components.

Inner diameter (I.D.) is the span of the empty space in a circular hose cross-section that affects the flow velocity of the fluid within the hose. A hose with an oversized I.D. will result in sluggish system performance, while an undersized I.D. can cause excessive pressure drops, leaks, and system damage.

The length of the hydraulic hose defines its maximum reach between end-points. Increasing length can also increase the pressure drop in the system because hose length is a function of head loss due to friction.

 


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