With a pipe cutter or cutting torch or a chop saw
It can't be done without cutting the pipe
diagonal cutting pliers
responsibilities of pipeters are, check n ticknes of pipe, know how to read the blue prent, cutting pipe by cutting torches, granding, veveling of pipe, check n measurement
The cold cut procedure for cutting a pipe is the omission of gas lines. It is cutting without the hazards of sparks and flames.
Possibly if there is little pressure in the pipe -(ie if it's a drain pipe) . For a pressure carrying pipe,I would cut out the hole and replace with a long coupling, or a short piece of pipe and 2 couplings.
The hawze pipe.
6"4"dummy cutting
This is hard to answer with out knowing what type of metal. what the pipe is being used for, the amount of pressure that may be not the pipe.
Copper you can. Treat it as you would any other connection, clean the area, surface and hole, get the moisture out and solder a patch over it. Small hole, you can just use solder or you can cut a small piece of pipe in half, clean and flux it and put it over the hole. Steel pipe, you can braze over the hole, same basic process as soldering, clean and fill with braze.
when tripping pipe in the hole do you close elavaters before running them up to the derrikman
Radiators do not have exhaust.