Pop-A-Plug® Cpi/Perma Medium Pressure Tube Plugs




0.472” to 2.067” (11.99mm to 52.5mm) Tube I.D.

Permanent sealing solution for leaking heat exchanger, condenser and boiler tubes.

Pop-A-Plug CPI/Perma Medium Pressure Tube Plugs feature internally and externally serrated sealing rings designed to maintain a helium leak-tight seal under extreme thermal and pressure cycling.

EST Group’s mechanical tube plugs install hydraulically in minutes with a unique engineered breakaway.

Controlled installation force limits operator fatigue and prevents damage to the tube, tube sheet and surrounding tubes.

Pop-A-Plug Tube Plugs accommodate a broad range of tube sizes and materials, with full material traceability documentation available to support fossil, nuclear, refining, petrochemical and chemical industry requirements.

Pop-A-Plug® CPI/Perma Literature – PDF

Operational Benefits

  • Eliminates welded or explosive plugging methods
  • Resistant to thermal and pressure cycling
  • Lowest lifecycle cost compared to alternative plugging methods available
  • Maintains helium leak tight seal to 1 x 10-6 cc/sec
  • Plug material matches tube material mitigating thermal expansion, contraction issues, and undesirable galvanic corrosion
  • Accommodates Through-the-Tube Plugging applications
  • Meets ASME PCC-2* recommendations and EPRI** criteria
  • Large inventory available with 24/7 emergency manufacturing capability



Pop-A-Plug® Cpi/Perma Medium Pressure Tube Plugs

0.472” to 2.067” (11.99mm to 52.5mm) Tube I.D.

Larger/smaller sizes available upon request

Up to 1,000 PsiG (68.9 BarG)

Brass, Carbon Steel, 316 Stainless Steel, 304 Stainless Steel, 4142 Alloy, 70/30 CuNi, 90/10 CuNi, Monel, Duplex 2205, Chromoly Grade 11, Chromoly Grade 22, Titanium.

Additional alloys available, contact Customer Service for full list

Pop-A-Plug® CPI/Perma Literature
Condensed Plug Change Out Brochure
Don’t Compromise Onsite Safety

Pop-A-Plug® Tube Plugging System

Product Information Request Form
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Pop-A-Plug® System Ram Packages

Installs Pop-A-Plug® Tube Plugs Quickly, Safely and Easily


Pop-A-Plug® Manual Installation Tools

For Fast, Reliable Installations – No Air Or Electricity Needed


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For Fast, Reliable Removals – No Air Or Electricity Needed


Hydra-Loc® Tube Sleeving

Repairing Tubes… For A Fraction Of The Cost Of Retubing


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It’s Time To Change Out Your Old Rubber Condenser Plugs To Pop-A-Plugs®! Minimize Plant Downtime!