General applications of a composite hose
Appearance
The surface of the gas hose should be smooth and flat, without defects such as bubbles, cracks, lack of glue, impurities, etc. In addition, the color should be uniform, without obvious color difference, and the marking should be clear and not easy to erase.
Dimension tolerance
The tolerance of the inner diameter and the thickness of the glue layer, etc., must meet the range specified by the standard. This can ensure the tightness and adaptability of the connection with the gas equipment.
Air tightness
Under the specified test pressure, the gas hose must not have gas leakage. This can ensure that the gas will not leak during use and ensure safety.
Pressure resistance
Can withstand a certain pressure without breaking or leaking. Usually it is tested at a certain multiple of the working pressure. If it is kept at the specified pressure test pressure for a period of time, the hose will not be damaged or deformed.
Flame retardant test
It has a certain flame retardant performance to reduce the risk of fire in unexpected situations. If tested according to the specified test method, the hose should have a certain flame retardancy. It should not be easy to ignite or can quickly self-extinguish after ignition.
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