Spiral Welded Pipe

chinacoal07 Ductile Cast Iron Pipe is one of kinds of iron pipe.Quality requirements of spheroidal graphite cast iron pipe grade control for grade 1~3.Thus got better improvement on the mechanical properties of the material itself.possess an essence of iron,performance of the steel.ductile iron pipes after annealing,the microstructure of ferrite plus a small amount of pearlite,mechanically sound ,anticorrosion performance,ductility can be good,Good sealing effect,ease of installation ,mainly used for municipal, industrial and mining enterprises, water supply, gas, oil, etc.