Sanhuali B-type flange drainage pipe and W-type drainage pipe and accessories have special safety and environmental protection functions such as large displacement, earthquake resistance, noise reduction, fire prevention, and antifreeze. Among them, spiral silencers, high-rise dedicated anti-odor floor drains, airbag inspection ports and other products have reached the international advanced level. They have been used in large-scale construction projects at home and abroad and have been praised by users. They have won the third prize of scientific and technological progress in the field of China's building materials circulation. Products are exported to overseas regions such as the United States, Germany, Japan, and South Korea. Sanhuali quick-connect ductile iron pipes and fittings have the characteristics of anti-vibration, high pressure bearing, corrosion resistance and convenient installation. There are currently 14 specifications from DN100 to DN800. There are more than 260 specifications of special clamp-type quick-connecting fittings for fire-fighting piping systems, and high-tech products such as multifunctional fire hydrants exert extremely high functional effects after large-scale high-end real estate applications. Various cast iron manhole covers with anti-theft and anti-drop functions, such as smart sewage manhole covers and water meter manhole covers, and manhole covers of conforming materials are widely used in municipal construction and real estate construction, and play an excellent function in ensuring the safety of municipal roads. Special specifications can be customized. Sanhuali products meet the relevant national technical standards and construction specifications, and some of the product technologies have reached the international advanced level. They have been applied in the "Luban Award" high-quality projects many times and are the first choice for high-end real estate and benchmarking construction.