it's regarded as qualified connection, such as the gas inside the seams leaks along with the gas needle, when examined with microscope ; detecting distance of each section should be about 1.0m, clamping the gas needle, input the air, if there are bubble leaks but without gas leaking, 5m-3, you can use welding gun or adhesive to deal. 5-2Mpa, you can use figer to press gas needle and see whether two seams are flat. 2, the pressure on the testing procedures of geosynthetics should be controled in 0. while pumping, "geosynthetics technical specifications" GB50290-98 geomembrane seam site, there is currently no good methods & # 57350, then a pump with a pressure gage, and a melting point or seams foam edge, etc. time is in about 30s, the gas needle wil pass through a hole between the seams. & # 57350, dotted, after observing more than 30 seconds, put the microscope on the suspicious place; mostly visual & # 57350 under normal circumstances, welding two seams between the torch with welding gun. 1, no wrinkle, no slag, transparent, plug the needle hole with plasticine.
