Page 27 - CorrugatedCatalog110913Rev8LR

Testing
Standard Leak Testing
Every corrugated hose assembly is leak tested prior to
shipment. Standard testing consists of pressurizing the
assembly with air and then submerging the entire assembly
under water. This method is reliable and suffcient for the
majority of applications.
Hydrostatic Testing
While the standard test is designed to detect leaks, hydrostatic
testing is designed to test the assembly’s strength. Testing of
an assembly to its full permissible test pressure can be
economically and accurately accomplished by flling the
assembly with liquid while concurrently evacuating all air. The
assembly is then hydrostatically pressurized using high-
pressure pumps and the test pressure is maintained for a
predetermined period of time.
High-Pressure Gas
Testing with air under water, at pressures of up to 2500 psi, is
available for specialized applications. For a more sensitive test,
the use of gases, such as nitrogen or helium, can be requested.
Dye Penetrant
Dye penetrant testing is available for both leak and weld bead
inspection, in accordance with Hose Master procedures or to
customer-specifed standards.
Helium Mass Spectrometer
This is the most sensitive leak detection method generally
available. The standard test method is to attach the assembly
to a mass spectrometer and generate a very high vacuum in
the assembly. The exterior of the assembly is then fooded
with helium. The relatively tiny helium atoms penetrate even
very small openings and are drawn into the mass spectrometer
where they are detected and the leak size is quantifed. Helium
Mass Spetrometer testing can be modifed to satisfy customer
or regulatory agency requirements.
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800 - 221 - 2319 • www. hosemas t e r. com
Note: Always test an assembly with a medium that has a smaller molecular size than the service
required.