Test procedure for spiral pressurizer for impermeability meter
Test procedure for spiral pressurizer for impermeability meter
1. Maintenance to D before the test, the surface is dried and wiped dry, then the sealing material used (the ratio of paraffin to varnish is 4:1, the ratio of paraffin to rosin is 5:1 or asphalt) The flat iron plate is heated and melted. After being completely melted, place the test piece on the side of the melted iron pan to evenly roll the rabbit layer.
2. The test piece coated with the sealing material is flattened with the bottom of the test piece by a screw press or a press, and the pressure is released after the test piece is slightly cooled.
3. The air in the permeator piping system is removed and the sealed practice is installed on the permeameter.
4. Starting from a water pressure of 0.1MPA, increase the water pressure by 0.1Mpa every 8H, and pay attention to the water seepage at the end of the test piece.
5. When the end faces of the three test pieces are seepage, the test can be stopped, and the water pressure at that time can be recorded. If the pressure is added to the specified pressure, the test piece with water seepage on the six test pieces within 8 hours does not exceed At 2 hours or after pressurizing to 12Mpa and after 8h holding water for more than 2 hours, stop the test and record the water pressure at this time.
6. During the test, if water is found to seep out from the periphery of the test piece, it is re-sealed.
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