Hydraulics can be simply defined as the science of using fluid, under pressure,to do work. Hydraulic hose assemblies are flexible, fluid power connectors used to convey and direct these fluids. Today, hydraulics hose progressed to where it is used in agriculture, construction, metal working, marine, forestry, mining and practically any other industry you can name.
This section recommends the methods and requirements necessary for the selection, fabrication and testing of hydraulic hose assemblies and pertains to nominal internal diameters 1/8 inch through 4 inch (3.2 mm through 101.6 mm).It is extremely important that the specific instructions of the hose and coupling manufacturers be followed! Therefore, the practice of “mixing and matching” hose and couplings from different manufacturers is strictly prohibited, unless the combination of components has been fully qualified to industry standards and approved by the respective manufacturers. In no instance should the information printed in this section super cede manufacturer’s instructions.
Many hydraulic hose styles are available and are described in detail in the component manufacturer’s catalogs. The most common and popular hose are manufactured to the SAE J517 100R series and EN hose standards addition to these hose types, there are a great many new styles and constructions that have been developed in the last 3 years to meet almost every possible condition imaginable.