Hi
As per industry practice the following are special process
Welding, painting, PWHT, NDE, GRE bonding, Concreting, grouting, HDPE fusion bonding, FBE coating, cable jointing, roto-lining, glass flake lining.,A special process is considered to be executed in accordance with documented and Qualified procedure and personnel who executing the activity shall be requiring qualification to demonstrate their skill to execute the activity.
I don't see any document stating which are special processes or not.
Regards
Vaithiyanathan