The Peak Hole inspection port / insulation plug is a liner for an access hole cut through an insulation material enclosing or placed upon a pipe vessel or tank (sometimes called “cheese holes”), especially of the type used in cryogenic or high temperature systems, such as found in petrochemical refineries, chemical processing equipment, power generation facilities and the like.

It makes for easy access for Non-Destructive Testing, NDT for Ultrasonic UT and Vibration testing equipment in process piping, steam piping, and vessels used in various industrial processing industries.

The detection of erosion or corrosion of the metal wall in process piping is essential to the safe operation and maintenance schedule of any industrial process facility. The Peak Hole is an essential aid to access the process pipe’s surface for NDT UT testing and failure prediction and aversion.

Many other access plugs and inspection ports have been tried, but de-mountable plugs are easily lost and provide no internal integrity for the insulation material surrounding the removed plug causing potential exposure to workers. Whenever the insulating material contains ceramics or other hazards, there exists the possibility of contamination of workers and nearby areas.

The Peak Hole inspection port / insulation plug provides the preferred type of insulation aperture liner and means of access which can be easily opened to permit necessary measurement of wall thickness, yet seals off the insulation material from exposure to workers.