Observe whether the PVC hose is colorless and transparent?

  • In most cases, without any testing tools and testing conditions, we can roughly identify the quality of PVC hose based on the senses of sight, smell and touch.

    1. Observe whether the lumen is regular and the wall thickness is uniform. The inner cavity and outer edge of the good quality PVC hose are evenly distributed in the standard circular ring wall. Take the PVC hose with an inner diameter of 89mm and a wall thickness of 7mm as an example. The thickest part of the tube wall of poor quality can reach 7.5mm and the thinnest part is only 5.5mm. It is easy to work under high pressure and uneven force on the tube wall will cause the PVC hose to burst or occur. Deformation affects normal use.

    2. Observe whether there are bubbles on the wall of the PVC hose or whether other visible objects are colorless and transparent. The wall of the high-quality PVC hose is crystal clear without any impurities. The yellowing of the defective PVC hose may be caused by decomposition, aging, or long-term improper storage during the production process due to improper handling.

    3. The high-quality PVC hose has no smell of other petrochemical products except a little plastic smell. The inferior hose has an unpleasant pungent diesel smell, especially in the hot summer, people can not get close.

    4. The inner and outer pipe walls of high-quality PVC hose are smooth and feel good while low-quality pipes are rough.

    5. When measuring the wall thickness, cut off the two ends of the PVC hose and select the middle tube as a sample for testing to prevent some illegal manufacturers from making fuss on both ends of the tube. The actual wall thickness is thinner than the two ends of the tube.

    6. Cut a few centimeters of steel wire at both ends of the PVC hose and fold the steel wire repeatedly to test the strength and toughness of the steel wire. Low-quality steel wires will break after one or two folds, while high-quality PVC hose wires require special tools to cut off. The quality of the steel wire determines the quality of the entire pipe. PVC hoses that cause quality problems due to the steel wire are prone to irreversible deformation.

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