PVC braided hoses are widely used in industries, agriculture, and homes due to their lightweight, flexibility, and cost-effectiveness. However, during actual use, some users have reported issues such as expansion or bursting of the hoses, which not only affect normal usage but can also pose potential safety risks.

There are several reasons behind this phenomenon in PVC braided hoses. First, excessive working pressure is a major factor. PVC braided hoses have rated working pressure and burst pressure, and if the actual operating pressure exceeds the hose's rated value, the hose wall and braid may not withstand it, leading to expansion or even bursting. Pressure fluctuations, such as water hammer effects, can also cause instantaneous high-pressure shocks that exceed the hose's tolerance. If mismatched or loose fittings are used during installation, abnormal localized pressure can develop, leading to swelling at the connection point and increasing the risk of rupture. Additionally, excessive bending during storage can lead to localized stress concentration, reducing the hose's pressure capacity and lifespan. Prolonged exposure to sunlight can also accelerate PVC material aging, making it hard and brittle.

Secondly, manufacturing defects can also contribute to hose issues. Low-quality PVC materials, uneven braid distribution, or inconsistent wall thickness can all affect product quality. Inferior PVC materials may lack sufficient strength to withstand higher pressures. If there are holes in the braid or insufficient weaving density, pressure will concentrate at weak points. Uneven wall thickness can make the thinner areas more vulnerable to pressure damage.

So, how can we avoid these issues in practical use? The key to ensuring stable performance of PVC braided hoses lies in selecting the right product and conducting proper maintenance. During the selection process, it's important to compare hose parameters and ensure that the rated pressure is higher than the maximum working pressure in use. For scenarios involving high temperatures or the transport of corrosive liquids, choose specially modified PVC hoses or hoses made from stronger materials. During installation, choose fittings that match the hose diameter and material, and ensure a tight, leak-free connection. After use, store hoses in a cool, dry environment. Avoid prolonged exposure to sunlight, and do not store hoses under pressure or in a bent position to prevent permanent deformation. Regularly inspect hoses for signs of aging, cracks, or swelling, and replace them promptly when issues are found.

For manufacturers, adding UV stabilizers to PVC materials can slow down aging, extend hose lifespan, and improve UV resistance. Optimizing the weaving process and using uniformly high-density fiber braiding can also improve the overall pressure resistance.