Yes.
Assuming your reference to "earthing" is grounding (Grounding Electrode Conductor), a pipe is, as it sounds, a pipe (i.e. water pipe). A plate would be, as it sounds, a square (or rectangular) copper plate which would be buried in the ground.
Because the mains pipe is buried in the ground where it takes longer for the cold to reach.
Pipe flanges are protected from corrosion by means of electrolysis,with dielectric flanges. The piping system is electricaly insulated by what is called a sacrificial anode. A bag of readily corrodable metal is buried in the ground with a wire running from the pipe to the bag so that the sacrificial anode will corrode first. If any electrical current charges the pipe it also serves as a ground.
he was buried in the ground
Yes it should be
It is not advisable to bury a galvanized gas lineMost civilized codes will not allow galvanized piping to be buried under ground even for waste or venting it is against good plumbing practices. I have seen quite a bit of buried galvanized pipe, both for water and gas. It does rust out eventually. Interestingly enough, it usually rusts through at point at which it comes up out of the ground.
Pic pipe under ground
He was Buried Under ground.
24 inches.
24 inches.
Duplex is two arpartments Triplex is three apartments