(1)The main gas pipelines shall be sectionalised so that in the event of rapture in the pipe line the methane gas in the general body of the air gets diluted within the permissible limit.(2)Sectionalisation shall be accomplished with automatic control valves which shall be of spring loaded type and pneumatic valves that fail close.(3)The tracer tubing shall be connected to pneumatic valve on each degasification hole. Which shall be activated (fail close) whenever pressure is lost in tracer tubing and also when the automatic control valves on the pipeline are actuated.
