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Hose Coupling: Selecting the Material for Hydraulic Fittings

There are numerous industrial systems that are designed to utilise hydraulic energy in their functions. Basically, these types of machinery and equipment have resilient hoses to hold the hydraulic fluid and transfer the power through the systems. The installed hoses are connected to tubes, pipes and cylinders using couplings for efficient fluid flow. These are fittings that are designed to elongate a hose, form bends or join the hose to another part of the equipment.

The connectors form tight seals that ensure that there are no leaks and that the pressure of the hydraulic fluid is maintained. If you have this type of industrial equipment, you will need to replace worn and damaged house couplings. It is crucial to identify fittings that can withstand heavy usage and provide prolonged service. Here are the advantageous fabrication materials that you should consider for your hydraulic hose couplings.

Carbon Steel

Carbon steel coupling products are suitable for hydraulic systems in general purpose industrial machinery. The material is resilient and can withstand high compression, so the fittings can be used in high pressure hydraulic applications. In addition, steel has a high tolerance for extreme temperatures, which makes it an ideal choice for conveying high temperature fluids. You should note that carbon steel is prone to rusting when exposed to moisture, saline and acidic environments. Therefore, you should select couplings that are plated with corrosion-resistant layers.

Stainless Steel

Stainless steel is essentially carbon steel which is alloyed with a significantly high content of chromium. This metal increases resistance to corrosion, prevents rusting and increases the lifespan of the hose fittings. You should purchase stainless steel couplings if your operation is set in corrosive conditions like the oceanic environment. There are different grades of this material, so you should explain your exact requirements to the industrial supplier. For example, if you want fittings for a boating vessel, it is prudent to select marine grade stainless steel. This can withstand saline water better than most of the other steel alternatives.


Brass couplings are manufactured using an alloy of copper and zinc. This material will not rust under adverse environments since it does not contain copper. Moreover, brass provides good hydraulic fluid characteristics and suitable strength and ductility. You should select these fittings for low pressure applications because the alloy is relatively soft and might break under high stress. In addition, check the temperature rating of the brass couplings and compare with your hydraulic machine operating temperature. The material has a considerably low melting point, so extreme heat is unfavourable.

For more information, contact Hose Mania or a similar company.