Hose and fittings tested to destruction

Hydraulic systems & components

Fourth Quarter 2008 Hydraulic systems & components

According to Genflex director, David Michelle, there is no standard machine available that can test the force needed to rip a hydraulic hose from its fitting, with the hose portion still being retained inside the fitting, except the one manufactured by Genflex Hydraulics in Johannesburg.

Genflex has manufactured a hydraulic hose pressure testing machine, which they have incorporated into their Pressure Testing Laboratory. The machine allows them to test the strength of attachment between the hose and fitting, and the attachment of swivel nuts on hydraulic fittings.

Michelle described the results. “On testing two-braid hose assemblies from sizes ¾” to 1¼” we found that the wire braids become detached from the fittings at between 3 and 5 tonnes force. In all of these instances no portion of the hose which was trapped inside the fittings showed any sign of tear or movement. All of the fittings and swivel nuts remained in good working order and showed no sign of stress.”

Genflex repeated the pressure test on their SP Multi Spiral hoses and the following results were recorded:

* The ¾” hose ripped at the fitting at a force of 5,25 tonnes.

* The 1” multispiral hose ripped at a force of 8,5 tonnes.

* The 1¼” multispiral swivel nut was forced from its body at a force of 10 tonnes.

* A further 1¼” wire trapped design fitting with a solid nut was placed on the machine producing the following results: the hose was ripped from the fitting at a force of 15 tonnes. The swivel nuts remained in good order and the hose portion inside the fitting was intact.

“Although these tests are not specified by any SAE or DIN specifications, they do prove the compatibility of our Genflex brand of hose and fittings which we distribute throughout Africa,” said Michelle.

Genflex staff members involved in the testing process are exposed to the more technical aspects of hydraulic hose and fittings tests, giving them more confidence and greater knowledge of the Genflex brand of hoses. This helps them to more accurately assess the correct hoses for specific applications. Genflex has invested over R¼ million in its Pressure Testing Laboratory.

It is Genflex’ policy to continue to maintain standards and invest time and money in order to enhance the training of its staff which enables the Genflex group of companies continued growth.

The Genflex group includes Singlehurst in KwaZulu-Natal, Interlok in Port Elizabeth as well as Hydraulic Hose and Equipment in Mozambique.

For more information contact David Michelle, Genflex Hydraulics, +27 (0)11 900 3235, [email protected], www.genflex.co.za

Share this article:

Hydraulic connectors with residual pressure
Editor's Choice Hydraulic systems & components
Hydraulic connections are vital in both outdoor and indoor industrial machinery. However, the hydraulics lines frequently require connecting and disconnecting for maintenance or changeover. The goal is to enable quick, easy swaps to enhance machine flexibility and productivity.

Read more...

Sun carries the load
Axiom Hydraulics Hydraulic systems & components
When valuable lives are hoisted in the air, reliable load holding technology is at its utmost importance. That’s why you can count on Sun’s excellent load holding cartridge valves.

Read more...

How to protect against water hammer
SA Gauge Editor's Choice Hydraulic systems & components
Water hammer is a high-pressure surge or wave created by the kinetic energy of moving fluid when it is rapidly forced to stop or change direction, altering the liquid’s velocity. The progression of the water hammer shockwave needs to be detained and slowed before reaching the instrument sensor. SA Gauge manufactures several such devices in order to achieve this.

Read more...

Axiom ups its game
Axiom Hydraulics Editor's Choice Hydraulic systems & components
In today’s competitive market, manufacturers of hydraulic components are constantly challenged to find better, faster and cheaper ways of producing parts. Axiom Hydraulics has met the challenge, and can now deliver a product with superior performance and significant cost savings for its customers.

Read more...

Condition monitoring for critical hydraulic equipment
Hydrasales Hydraulic systems & components
Systems maintenance personnel often classify equipment as critical, based solely on its value. Instead, critical equipment should be determined by its importance to the operation and the objectives of the organisation.

Read more...

Hydraulic bolt tensioning
Bearing Man Group T/A BMG Hydraulic systems & components
BMG’s Nord-Lock bolting solutions include Boltight hydraulic bolt tensioning tools, which can be used to tighten bolts simultaneously, ensuring even preload in industrial applications and extreme environments, ...

Read more...

How to get the best of both worlds with hydraulics and electric
Editor's Choice Hydraulic systems & components
While battery technologies continue to evolve and overcome challenges that have previously restricted more rapid electrification adoption rates, hybrid electric systems are well positioned as an ideal interim solution.

Read more...

Create and recover energy all in one check valve
Axiom Hydraulics Hydraulic systems & components
Energen is a new, high-efficiency check valve from Sun Hydraulics that allows free flow from inlet to outlet, and blocks flow in the opposite direction. Composed of an integrated generator that converts ...

Read more...

Categories

Hydraulic systems & components

Hose and fittings tested to destruction

Further reading:

Publications by Technews