Hose Couplings and Clamps

Hose Couplings and Clamps

A hose coupling is a connector on the end of a hose to connect (or couple) it with another hose or with a tap or a hose appliance, such as an irrigation sprinkler. It is usually made of steel, brass, stainless steel, aluminum or plastic.

Hose couplings are made in different varieties to match load, assembly, and cost specifications. Although there are many modifications within each type, the four major ones are worm-gear drive, latch, ear, and quick-connect straps.

Worm-gear metal hose clamps are available in different sizes for many load conditions. Most have a smooth internal face to avoid damage to hose surfaces. Latch clamps often have a ratchet tooth-locking action to retain clamping load. Typically used for light loads, the clamps are tightened in place with pliers.

Single-use ear clamps are usually applied in light-load situations. The clamp is slipped over a hose or duct and the ears are crimped with special tools. Quick-connect straps are suitable for large-diameter ducts and light loads. The strap is pulled to a loose fit, then tightened by turning the screw.

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Uses and Applications

Hose clamps are typically limited to moderate pressures, such as those found in automotive and home applications. At high pressures, especially with large hose sizes, the clamp would have to be unwieldy to be able to withstand the forces expanding it without allowing the hose to slide off the barb or a leak to form. For these high-pressure applications, compression fittings, thick crimp fittings, or other designs are normally used.

Hose clamps are frequently used for things other than their intended use and are often used as a more permanent version of duct tape wherever a tightening band around something would be useful. The screw band type, in particular, is very strong and is used for non-plumbing purposes far more than the other types. These clamps can be found doing everything from mounting signs to holding together emergency (or otherwise) home repairs.

Worm-drive hose clamps can be made of a long clamp if you have several, shorter than the job requires. Some things seen assembled with hose clamps include the tail boom on a GMP Cricket model helicopter, a homemade gas scooter, makeshift pipe hangers, mounts for rooftop TV and shortwave antennas, and virtually every imaginable automobile body component.

Hose clamps are commonly used in the agriculture industry as well. They are used on Anhydrous Ammonia hoses and are made from a combination of steel and iron. Anhydrous ammonia hose clamps are often cadmium plated to prevent rust and corrosion.

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