HDPE DWC Pipes are future of underground Sewer, Drainage & Electrical Cable pipelines. This pipe has excellent load bearing capacity & smoothness to perform better than other corrugated pipes.
Why Only DWC Pipes?
Detailed studies have been conducted worldwide on the life factor by various agencies. Plastic pipe organization is one of the premier institutes in Europe which has declared that the life is at least 50 years. Provided the pipes are properly produced - used and well installed.
HDPE corrugated pipe is double layer pipe which has corrugated shape in outer & plain & smother surface inner which has high C factor than other conventional pipes. This surface provide it minimum friction loss & maintain the velocity of solid waste or storm water
HDPE corrugated pipe is a exible pipe system that performs well in both high cover and low cover applications. Its unique ability to support and distribute live and dead load enables it to meet almost every installation condition.
Silt tight and water tight joints mean that what's inside the pipe stays inside the pipe, and what's outside stays outside. All the types of joints i.e.. Sockets, Elbows, Bends, End Caps are available.
High-density polyethylene is one of the most chemically inert of all plastics and therefore is extremely chemical and corrosion resistant.
HDPE is very resistant to abrasion. These two characteristics give corrugated polyethylene pipe a signicant long-term advantage over concrete and metal pipe
HDPE pipe is light, tough and is manufactured in long lengths. This adds up to signicant potential for installation cost savings.
It has been proved by various authorities that the use of HDPE DWC pipes as ducting material have not only reduced the damages to the cables but also reduced the revenue losses and there by contributing to prot generation of the user organizations
Comparison of DWC HDPE Vis-à-Vis Non Pressure RCC Pipes
|Pipe Property||HDPE Double Wall Corrugated Pipe||Concrete Pipes|
|Metallurgical Property||Flexible pipe - good flexural strength, high tenacity, not brittle||Rigid Pipe - No Flexibility, high density, low tenacity, very brittle|
|Structural Property||Flexible Joints - allows deformation and movement that won't damage structure under external load. No additional structural protections in the form of bedding reinforcements are necessary||When bearing external load, even very small deformation will damage the structure of pipe. Provision of additional structural bedding is almost imperative.|
|Hydraulic Properties||The glass smooth inner surface has Manning's 'N' in the range of 0.009-0.011 which virtually doesn't deteriorate during the entire life expectancy.||The flow resistance factor for NP RC Pipes is much higher (0.011 - 0. 015) which also deteriorates very fast in 5 year ageing intervals as well.|
|Jointing System||Online Integrated Coupling system with electrometric seal ring for leak tight joints||Spigot & socket joints & sealing by cement mortar, additional coupling material required|
|Water Tightness||Very good connection tightness, no leakage of sewage & no infiltration of ground water even in unfavourable bedding contour. Environmentally friendly since no chance of water & soil pollution.||Poor tightness, susceptible to leakage at joints, no flexibility for bending compatibility with bed contour. Possibility of environmental pollution due to sewage leakage|
|Chemical Inertness||Immune to all corrosive chemicals and biological ingredients. No possibility of 'Crown Corrosion’||Deteriorates rapidly in contact with mild chemicals and biological contents. 'Crown Corrosion' is a chronic problem resulting in frequent system maintenance problems.|
|Life Expectancy||Designed Life Time expected up to 75 - 100 years. Time tested up to 40 years in various parts of world||Maximum life not more than 30 years|
|Installation time||Good flexibility, minimal requirement of foundation, no seasonal or temporal constraints in installations, good bending & flexural property, light weight, ease in transportation, handling and installation & results in a favourably low installation time||High rigidity, imperative requirement for structural bedding, cumbersome and intensive labour oriented transportation handling, extensive requirement of equipments for lowering & installation|
|Plant Root Formation||HDPE DWC Pipe - Plant root can not be entered due to it physical property, tensile strength and proper joining||RCC Hume Pipe - It has been observed that after some years root develop into the RCC pipe in corrode part, poor joints & low quality of pipes which block the complete system.|