Material: It is required to use unplasticized polyvinyl chloride (PVC) or improved PVC compounds with the required electrical and mechanical properties.

Fire and smoke prevention: Ducts and fittings must meet strict flame retardant testing requirements (such as UL's vertical combustion test), and the toxicity of smoke generated during combustion must be controlled within a certain range.

Electrical insulation: As a non-metallic conduit, it is an excellent insulator that can prevent current leakage.

Corrosion resistance: PVC material is naturally resistant to acid, alkali, salt, and various chemicals, and will not rust like metal conduits.

Mechanical properties:

Compressive strength: Schedule 80>Schedule 40.

Impact resistance: The catheter must pass a drop hammer impact test at low temperatures (-18 ° C or specified temperature).

Bending performance: It is allowed to use bent pipe springs for cold bending at room temperature (small pipe diameter), and prefabricated elbows are required for large pipe diameters or specific situations.

Weather resistance: The product needs to pass a UV exposure test (such as a 720 hour QUV test) to ensure that its performance will not significantly decrease when used outdoors.