Designed as a fast and safe way to seal leaking heat exchanger and condenser tubes. Pop-A-Plug CPI/Perma tube plugs are resistant to thermal cycling and are able to provide a seal that is helium leak tight. Pop-A-Plug CPI/Perma tube plugs install using a controlled force. This protects against damage to tubesheet ligaments and adjacent tubesheet joints, extending the life of your heat exchanger and reducing total operating cost. Operating pressures to 1000 PsiG (68.9 BarG). Tube sizes for 0.472” to 2.067” (11.99mm to 52.50mm) I.D. tubes. Helium leak tight to 1 x 10-6 cc/sec. Larger sizes available. Removable for retubing. Compliant with quality assurance systems including; ANSI N45.2, 10 CFR 50 Appx. B, 10 CFR 21.