Gray cast iron pipe has low strength and toughness, no elongation, can not withstand higher internal pressure and external load, and is easy to break. It is a pipe on the verge of being eliminated in gas engineering.
Grey-mouth cast iron pipe strength and toughness is low, no elongity, can not withstand high internal pressure and external load, easy to crack, in the gas project belongs to the near-elimination of the pipe.
Gray cast iron pipe has low strength and toughness, no elongation, can not bear high internal pressure and external load, and is easy to fracture, so it is a kind of pipe which is on the verge of being eliminated in gas engineering.