Established in 1993, Guanfa Valve Manufacture Co., Ltd. is specialized China concrete pipe manufacturer and distributor of valves, hoses, tubes and pipes. Our oem concrete pipes are suitable for acid, alkali, water, steam, seawater, coal gas and natural gas. They are widely used in petroleum, chemical, paper making, fertilizer, brewing and metallurgy. The use of specialized software of Pro/E and CAD has shorted the P&D and trial manufacture cycle, and greatly improved the service life and dependability of products. Our high-quality products have been exported to the North Amercia, UK, USA, Germany, Italy, India, France, Australia, Japan.

Since the beginning of civilization, conduits have been used for the transportation of water, industrial wastes and sewage. Perhaps the most permanent conduits were formed of reinforced concrete pipe. Modern sanitation was made possible in large part through the use of concrete sanitary sewer pipe. Concrete is one of the most versatile, durable and economical conduit materials available for storm sewers, sanitary sewers and irrigation lines.
As a result of advanced technology and design, the use of concrete pipe continues to increase throughout the world. Engineers and specifying agencies have recognized it as a permanent, cost-effective system for transporting liquid and waste materials. Once in place, properly designed underground pipelines require no upkeep or operational expense and retain their serviceability for many years.

Today, there are three commonly used processes for producing precast concrete pipe: dry cast, packerhead, and wet cast. The first two, dry cast and packerhead (conventional or bi-directional) are classified as immediate strip methods. (The word "strip" refers to the removal of the form from the pipe.) "Immediate strip" is characterized by the use of no-slump concrete, which is sufficiently compacted during the pipe-making cycle to permit removal of the inner core or outer form as soon as the pipe has been produced. Thus, the form is available for re-use any number of times during the day.
Open trench, embankment or trenchless installation
Trunk sewers and storm and sanitary sewer outfalls
Treatment plant piping, utility tunnels and tunnel liner
Storm drains, culverts and sanitary sewers
All fill ranges and live load conditions
Underwater stormwater runoff retention
Impoundment overflow conduits
Irrigation distribution systems

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