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<br />SEAM TESTING PROCEDURE <br />The hot wedge seaming machine creates two distinct seams. These rivo seams aze <br />separated by a void or air space. This seam design is intentional for two primary reasons. <br />First, it allows a very positive test for leak inteerity, and second, the double weld seam <br />offers both a primary and a secondary seal for the seam. <br />Test Procedure: <br />1. Seal one end of the seam by applying heat to the end of seam by applying heat to <br />the end of the seam, via hand leister, until "flow temperature" is achieved. <br />2. Clamp off end using hand vise gripper. <br />3. A pressure gauge/needle assembly is inserted into void or air chamber. <br />4. Air pressure is then applied into the air chamber with the use of an air pump per <br />the following schedule: <br />Initial Pressure Schedule <br />Material <br />Field Testing <br />Minimum PSI Maximum PSI <br />30 mil 2~ 30 <br />40 mil 2l 30 <br />60 mil 27 30 <br />80 mil 27 30 <br />100 mil 30 30 <br />~. After initial start of air pressure, the air should be allowed to reach ambient liner <br />temperature. <br />6. Pressure test FMI, seam according to the initial pressure test schedule. Hold test <br />for five minutes. If no pressure drop is greater than the maximum allowable <br />pressure drop, the seam is judged leak &ee. <br />51 <br />