Can PE pipe be pressed repeatedly?

In water supply and drainage projects and rural irrigation projects, PE pipes are widely used because of their corrosion resistance and flexibility. Such as PE hot melt pipes, PE water supply pipes, PE drinking water pipes, PE rural irrigation pipes, etc. are common pipe types. After the pipeline is installed, the pressure test is an important part of testing the sealing and pressure-bearing capacity of the pipeline. But the question that follows is, can PE pipes be pressed repeatedly? The answer is that PE pipes are generally not recommended to be pressed repeatedly, and frequent pressing operations may bring many hidden dangers to the pipeline system.

Although PE pipes have certain pressure resistance and can withstand the load within the design pressure range during normal use, this does not mean that they can withstand repeated pressure shocks. PE pipe is made of polyethylene material, and its molecular structure will gradually change under long-term and frequent pressure changes. Each time it is pressed, the pipe will be slightly deformed by the action of pressure. When the pressure is lifted, although the pipe can return to a certain shape, repeated expansion and contraction deformation will gradually fatigue the molecular chain inside the pipe. Just like a rubber band will lose elasticity after repeated stretching and contraction, the physical properties of PE pipe will decline after repeated pressing, the strength and toughness will be weakened, and it will become more prone to cracking.

repeated pressing may also have a serious impact on the connection of PE pipe. PE pipe is usually connected by hot melt. Under normal circumstances, the interface of hot melt connection can ensure good sealing and connection strength. However, repeated pressure changes can cause the joint to be continuously stressed. Each time the pressure is applied, the pipe at the connection will expand due to the pressure, and then contract after the pressure is withdrawn. This frequent relaxation process will cause the molecular fusion structure at the connection to gradually loosen. For PE drinking water pipes used to transport drinking water, the loosening of the connection may lead to the infiltration of external contaminants, which affects the safety of water quality. For PE rural irrigation pipes used in rural irrigation, the leakage of the connection will reduce the irrigation efficiency and cause water waste.

In addition, repeated pressure may also mask the real pipeline problem. In the first or normal times of pressure testing, if the pipeline has small cracks or the connection is not tight, it can usually be detected. However, after repeated pressure, the original minor damage may be further expanded under the pressure impact, and the short-term stability of the pressure during each pressure may give the illusion of normal pipeline, making potential problems unable to be discovered and repaired in time. When the pipeline resumes normal operation, these neglected problems may suddenly break out, resulting in serious pipeline failures and increasing maintenance costs and difficulties.

In the engineering construction of Qianjiang, Xiantao and other places in Hubei, choosing high-quality PE pipe products and professional PE pipe manufacturers is the key to ensuring the quality of the project. As a professional PE pipe manufacturer, Hubei AD Building Materials Co., Ltd. produces PE hot melt pipes, PE water supply pipes and other products in strict accordance with national standards. From raw material procurement to production and processing, every link is strictly controlled to ensure that the pipes have good pressure resistance and stability. The company is well aware of the harm of repeated pressing on PE pipes. It not only provides customers with high-quality pipes, but also provides customers with professional pipeline installation and testing guidance. It is recommended that construction personnel strictly follow relevant specifications and standards when performing pressing tests to avoid unnecessary repeated pressing. If you have pipe procurement needs or pipeline technical consultation, please call 17399989993, Hubei AD Building Materials Co., Ltd. will provide you with professional services and detailed answers.

PE pipes are generally not recommended to be repeatedly pressed. Reasonable and standardized pressing operations can better ensure the performance of PE pipes and the safe and stable operation of the pipeline system. Hubei AD Building Materials Co., Ltd. helps various projects in Qianjiang, Xiantao and other places in Hubei with high-quality products and professional services, and escorts the reliable operation of urban water supply and drainage and rural irrigation infrastructure.