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The Hydrostatic Pressure Method
2019/05/30
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Hydrostatic Pressure is the pressure of fluids present in a hydrocarbon reservoir. This pressure is usually exerted by a column of water on sea level from the depth of a hydrocarbon reservoir inside the earth's surface. The data collected from hydrocarbon and hydrostatic pressure is helpful in volumetric calculations. Hydrostatic pressure is also known as formation pressure or reservoir pressure.
Hydrostatic pressure refers to the water permeability of fabrics under a certain water pressure. It is suitable for all kinds of fabrics, including those treated with waterproofing. Hydrostatic pressure method is used to measure the waterproofing of fabric, there are static pressure method and dynamic pressure method. Static pressure is used for water-conducting fabrics, and dynamic pressure is used for coated or compact fabrics.
In the AATCC 127 test method, cut at least three samples with an area of 200mm*200mm along the diagonal direction of the tested sample. The waterproofing of the two sides of the sample is different, which should be marked. Test with distilled water at (21±2)℃ and the test area is 100cm². The water pressure is increasing at a constant rate, if there are 3 water droplets in different places on the sample, the test will be finished (however, if the water droplets exudated within the 3mm of the sample clip, it is ineffective). The results are the average values of three samples under the same conditions. The larger the test value, the greater pressure required for the water seepage, and the better its waterproofing. The hydrostatic pressure tester was used in the test.
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