Water seepage performance of PE pipe
Release time:
Aug 25,2019
The seepage performance of PE water supply pipe has important theoretical significance and practical value, and the commonly used test methods to study PE seepage performance are immersion weighing method and differential pressure osmosis method. The soaking weighing method is to soak PE in a water container with controllable temperature until it is saturated, then place the saturated sample in an oven with the same temperature for desorption, weigh once at intervals during the whole process, and then obtain the weight and time data of the whole process to evaluate the water permeability of PE water supply pipe. This method is the basic method to determine the water permeability, the equipment is simple, low cost, so it is widely used in practice. The differential pressure osmosis method is the benefit.
The seepage performance of PE pipe has important theoretical significance and practical value, and the commonly used test methods to study PE seepage performance are immersion weighing method and differential pressure osmosis method.
The soaking weighing method is to soak the PE pipe in a water container with controllable temperature until it is saturated, and then place the saturated sample in an oven with the same temperature to desorb, weigh once at intervals during the whole process, and then obtain the weight and time data of the whole process to evaluate the water permeability of the PE pipe. This method is the basic method to determine the water permeability, the equipment is simple, low cost, so it is widely used in practice.
The differential pressure permeation method is to isolate the permeation cavity into two independent spaces by using the sample, and then fill one side with water vapor to form a water vapor pressure difference between the two sides of the sample; the water vapor permeates through the sample into the low pressure side under the pressure difference drive to cause the pressure change of the low pressure side, and the pressure change of the water vapor on the low pressure side is measured with a high-precision pressure measuring device to characterize the permeability of the sample. At present, the differential pressure method is mainly used to study the barrier properties of plastic films for food, medicine and other packaging.
In addition, scientific researchers also put forward the capacitance method, infrared measurement method, Coulomb analysis method of nuclear magnetic resonance method and other test methods to study PE pipe, PE water supply pipe seepage performance.
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