What type of gas piping would require the removal of permanent construction to access?

Concealed piping refers to gas lines that are installed within walls, ceilings, or other structural components of a building, making them not visible or easily accessible. In situations where this type of piping is used, accessing it for inspection, maintenance, or repairs often requires the removal of permanent construction elements, such as drywall or paneling.

This is significant because it highlights the safety and regulatory considerations in gas installations, as concealed pipes need to be installed properly to mitigate risks associated with gas leaks. The piping must adhere to local codes, ensuring appropriate materials and installation methods are used. On the other hand, external piping, flexible piping, and temporary piping are generally designed to be accessible without the need for altering built structures, thus making them easier to inspect and service when necessary.