Ductile iron pipe fittings are capable of withstanding high water pressure.,Can withstand external loads and adapt to changes in geological conditions,High strength, good toughness, corrosion resistance, easy installation of flexible joints, strong seismic resistance, and low labor intensity.,Suitable for poor geological areas and crossing highways,Steel pipes, no additional processing required, In addition to excellent corrosion resistance.,Suitable for coastal and saline-alkaline areas. Widely used in underground pipeline projects. Large-scale pipeline installation projects highlight its ease of installation.,Low labor intensity advantages.