Test methods

Several test types are employed:

• Fire hazard test: The device is subjected to an abnormal heat source similar to one that would be produced during an electrical fault, and must report a given inflammability. The test method is governed by IEC 60695-2-11, glow wire flammability test method.
• Fire propagation: The objective of this test is to define the ability of a system to ignite, and if it does, if limited spread of fire takes place. The test method is governed by IEC 60695-11-2 by means of which a 1 kW flame is applied on an assembled set of the product.
• Reaction to fire: This test measures the halogen content in the gases emitted during a fire in accordance with IEC 60754-2.
  

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Test methods

The methodology is based on introducing the test sample in a furnace for a set period of time. After heat treatment, a load is applied to the pipe in accordance with its rating. When the load is removed, it must be possible to pass a specific calibre through the inside of the pipe.

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Test methods

Depending on the mechanical property to be tested, different methods are applied:

• Compression test: The pipe system is subjected to compression forces according to its rating over the wireframe shell of the circumference over a given period of time.
• Impact test: Sudden bangs are applied to the pipe system using a pendulum hammer, whose weight and height of impact are defined by the pipe rating.
• Curving test: This test is only applicable to bendable and rigid pipes, and it is based on consecutively bending the pipe to a given radius using a rotating transmission system, to ensure that the product does not undergo significant deterioration after the test.
• Tensile test: The pipe system is subjected to tensile forces according to the rating over the wireframe shell of the circumference over a given period of time.
• Flexion test: This test is only applicable to flexible pipes. The test sample is subjected to 5000 alternate flexures using an oscillating arm with a given cadence to ensure that the product does not suffer significant deterioration after the test.
• Pinch test: This test consists of attaching a set of clips to the system that apply a given force of stricture to it. After subjecting the pipe to a certain temperature, it must allow a given calibre to pass through. Applicable to rigid or bendable pipes.
• Suspended load: This is defined for specifically rated pipes. The system to be tested is suspended from a horizontal surface and a given working load is applied following the instructions defined by the manufacturer over a given period of time.

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Test methods

The test method depends on the type of material the ducting system consists of.

• Metal pipe systems: For this type of product the continuity is measured to ensure it guarantees equipotential connection and a possible earth connection between sections of the product and the joints.

• Insulating or compound insulating material pipe systems: Both the pipe and its accessories must ensure that no electrical currents run through it as a result of housing the cable. The following items are measured:
  • Voltage supported at industrial frequency.
  • Resistance of the continuous voltage insulation.

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Test methods

Several test methods are employed:

• Degree of protection of the enclosure: The IP rating of the pipe system in regard to liquids and solids entering according to IEC 60529 is determined.
• Resistance to corrosion: This is applicable to metal and compound pipes according to the manufacturer’s rating, consisting of applying different acidic solutions and solvents to it.
  

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