Air Testing - Geomembrane Liner Fabrication EPI The ...
Pressure used in each test varies with the temperature of the PVC geomembrane. Air channel testing is performed according to EPI QC Standards based ASTM D7177 . "T" Seams: ALL field seams must be tested and T-seams can be difficult to air channel test if not welded properly. T-seams are defined as a point in the seam where three layers of material overlap each other.
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