February 28th, 2018
In a previous blog, we discussed the common industry acronym S.T.A.M.P.E.D. This acronym is short for Size, Temperature, Application, Material/Media, Pressure, Ends, Delivery.
Today we will touch on the first one, Size.
In a custom made hose assembly, either hydraulic or industrial, size is one of the most critical pieces of information we need to gather as hose professionals. Many people might think of one or two dimensions being important, but I will share a couple of other insights to ensure you get the correct hose assembly for your specific application.
Typically customers are familiar with the following two measurements, the inside diameter (i.d.) and the outside diameter (o.d.). The inside diameter is the size of the interior tube of a hose. This can range from something as small as ⅛” i.d. up to large transfer hoses that could be 10” i.d. or larger.
In many applications, it is critical to have the i.d. match up exactly with the i.d. of the size of hose that came off of a piece of equipment originally. I won’t bore you with the science of it all, but it deals with physics, flow rates, gallons per minute, and ensuring your equipment has the proper amount of fluid it needs to run efficiently (in the case of a hydraulic assembly).
The second measurement would be the outside diameter. The o.d. is the exterior profile measurement, and is critical in applications where hoses are routed through an engine block, bundled together in a hose protection sleeve, or anywhere that space is limited. We make sure to ask walk-in customers if the outside diameter is critical to their job at hand, ensuring they leave with the exact hose they need. A good example of this is the over the sheave hydraulic hose assemblies that go over a pulley on forklifts or aerial lifts. These pulleys are designed to route hoses in a groove and fitting that groove is of utmost importance.
The final dimension I will discuss today is the overall length (o.a.l.). When asking a customer about the length of a hose assembly, it is important to differentiate hose length (h.l.) vs. the overall length (o.a.l.). This might sound like a trivial dimension, but not accounting for the added length of fittings can render that hose assembly useless. For a small hydraulic hose, the addition of fittings can add 2-3” of length to the assembly, whereas a larger industrial assembly, that addition could be as much as 3-10”.
I hope that this blog has given you a bit more information in regards to the importance of paying attention to these critical measurements. If you have any questions or need help finding the right hose for your application Cross Company is here to help!