REDWIRE How to measure metal hose assemblies, according to Hose Master

March 4, 2021 REDWIRE is news you can use from leading suppliers. Powered by FRASERS.

Posted by Sudbury International Engineered Products Limited


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metal hose assemblies

Measurement of metal hose assemblies is crucial.

Hose Master metal hose assemblies are available in Canada via Sudbury International Engineered Products Limited. Hose length is a crucial factor in many industrial applications, but one often neglected. Using an incorrect length can shorten a hose’s operational lifespan, and it can also result in failure in a hose assembly.

To avoid needless failures, the Hose Master team offers the following advice on properly measuring its metal hoses from Sudbury International.

Verifying the installation design

When metal hose assemblies are too short, it could deform the corrugation geometry when they are stretched between connecting points. But if an assembly is too long, it could become over-bent when the hose tries to get out of its own way. So it is vital to get the length right.

The first step in length calculation is to verify that the existing installation was designed properly. Torsion, over-bending, and assembly compression are signs of poor design and can result in premature failure. Then the user must measure the overall end-to-end length of the assembly. The points from which measurement should be taken should vary between fitting types; going from an incorrect point leads to inaccurate measurement.

Measurement points for different fitting types:

  • JIC/SAE: measure from the seat
  • Elbows: measure to the centre line
  • Fixed flanges: to the flange face
  • Floating flanges: to the face of the stub end
  • Threaded fittings: to the fitting end

There must be sufficient live length to accommodate the required movement during service. This refers to the portions of metal hose assemblies that can flex during operation. Different formulas are available to calculate these length requirements. If the existing live length is not enough, engineers can offer expertise in adjusting the overall length appropriately.

Following measurement and design, the assembly must meet certain tolerance requirements. NAHAD sets proper guidelines for length tolerances, and Sudbury International hoses can hold to them – and to tighter specifications when necessary. Adhering to these tolerances enables solutions for strict circumstances and boosts reliability, safety, and longevity.

Following these guidelines will result in assemblies that last and perform best.

To learn more, contact Sudbury International.


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Posted by Sudbury International Engineered Products Limited


Expansion Joints, (fabric, metal, rubber, dog-bone), Automatic Recirculation Valves For Pumps, Specialty Sootblowers, Se... Read more

Contact supplier