Set up in 1995, Tonglu Valves Manufactring Co.,Ltd. is one of the leading China corrugated 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 corrugated 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.

Our hdpe corrugated pipe is a recognized, reliable, affordable and safe solution for all your drainage needs. It is ideal for storm water retention and detention systems, culverts, storm sewers, wastewater, subsurface and subdrain systems, ditch enclosures and field drainage. In each and every case, corrugated pipe serves a single overriding purpose, to effectively control the gravity flow movement of water and waste in any environment. Its unique qualities make it the pipe of choice for water and waste management experts.
Hdpe corrugated pipe is an ideal blend of structural strength and flexibility that serves well in buried or unburied conditions. While our single wall pipe has perforations installed in it to let the water in, our dual wall wall pipe comes with gasket couplers making it water tight so that whatever is inside stays there and whatever is outside stays outside. This gives communities and citizens a sense of security about their water supply. Chemically inertness, and abrasion resistance makes corrugated pipe impervious to all sorts of corrosive and harsh conditions. Durable and lightweight, our corrugated pipe is also easy and cheap to install and promises an uninterrupted service life of a 100 years or more.

Large diameter steel reinforced polyethylene spiral corrugated pipe is developedby Goldstone based on the normal polyethylene corrugated pipe.The innovation reinforced corrugated pipe provide the steel reinforced structureto definitely increase the ring stiffness of the corrugated pipe, in the mean time,the weight of the pipe has been obviously reduced.The pipe diameter could be ranged from 600mm to 2000mm, which gives the large diameterpipe the better ring stiffness more than SN8.The pipe has innovated three layers wall structure. The steel reinforced layer isin the middle structure to provide the high stiffness, and either the inner layeror outer layer is formed by high-density polyethylene that protects the pipeout of the corrosive. And there is a super bond medium between steel and polyethylenewhich integrate them into one piece.

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