Set up in 1995, Tonglu Valves Manufactring Co.,Ltd. is one of the leading China concrete pipe manufacturer and supplier in Yongjia County of Zhejiang Province. We manufacture all products strictly conforming to the API, JIS, ANSI, BS, GB, NF and DIN standards. Our oem concrete pipes are available to users on request and are used for municipal works, petroleum, chemical industry, power station, metallurgy, national defense, and scientific research fields.

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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© 1995-2009 China Tonglu Valves Manufactring Co.,Ltd. All Rights Reserved.