May I ask whether it is the piping department responsible for installing the pressure guide tubes of instruments, such as those of pressure transmitters, or is it the instrument control team that handles this task?

The Instrumentation and Automation specialty is responsible for providing the atlas

But to determine exactly how the gas supply pipes should be routed, specific diagrams are needed, right? The atlas only shows the methods; does piping still require instrument control?

The piping is responsible for providing pressure taps. Instrumentation for the pressure guiding tube behind the pressure tapping.

For pressure tapping points and instrumentation points in general design units, the piping department handles the primary valves located before the instruments; the design of everything behind those valves is carried out by the instrument control department. It seems the poster is wondering who is responsible for the construction. Under normal circumstances, the person whose unit the drawings belong to is responsible for carrying out the construction work. Given that some instruments have high-pressure pressure transfer pipes with small diameters, which require high standards of quality, it is best to have professional pipe welders with the appropriate qualifications to carry out the welding tasks. These welders can be provided by the instrument team itself or borrowed from those specialized in piping work. But whether to borrow and how to borrow is a matter of coordination among the teams.

The instrumentation team is responsible for the installation of pressure guiding pipes, with the interface located at the root valve

The gas supply pipe layout diagram was prepared by the instrumentation and electrical engineering team, right?