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Smooth Cor™ consists of a standard corrugated steel pipe as its structural exterior shell and includes a hydraulically smooth steel liner. Both the interior liner and exterior shell are coated on both sides with a polymer coating. This combination makes Smooth Cor Pipe the economical and performance alternative to concrete in difficult situations such as weak soils, poor subsurface drainage conditions, steep slopes, and high fills.
Smooth Cor can be fabricated into any type of structure including tees, elbows, laterals, catch basins, manifolds and reducers. Pre-fabricated fittings are more economical and have superior hydraulic characteristics when compared to concrete structures.
Smooth Cor should be specified as an alternative under normal site conditions and specified exclusively under very difficult situations that demand the strength of CMP with positive joints and a hydraulically efficient smooth liner.
| FEATURES | BENEFITS |
|---|---|
|
Smooth steel liner |
Manning’s “n” of 0.012, outperforms reinforced concrete pipe |
|
Corrugated steel shell |
Provides structural strength to outperform rigid pipe |
|
Polymer coating |
Protects against abrasion and corrosion to provide a service life of 100 + years |
|
High beam strength |
Superior to concrete pipe in many difficult situations such as weak soils, poor subsurface drainage conditions, steep slopes and high fills |
|
Lightweight |
Easier and less expensive to install than concrete pipe |
The rugged, corrugated steel shell of Smooth Cor pipe supplies the structural strength to outperform rigid pipe, while a smooth interior steel liner provides a Manning’s “n” of 0.012. This combination makes Smooth Cor pipe both the economical and performance alternate to concrete in many difficult situations such as weak soils, poor subsurface drainage conditions, steep slopes, and high fills.
Smooth Cor™ is Contech’s double wall corrugated metal pipe (CMP) that combines a corrugated steel exterior shell with a hydraulically smooth steel liner. Both the liner and shell are polymer coated to provide enhanced durability, hydraulic performance, and corrosion resistance.
Unlike conventional corrugated metal pipe, Smooth Cor™ features a smooth interior liner that delivers a Manning’s “n” value of 0.012 for improved hydraulic efficiency. The corrugated outer shell provides the structural strength associated with corrugated steel pipe while maintaining smooth-wall hydraulic performance.
Smooth Cor™ is commonly used for:
It is especially effective in difficult site conditions such as weak soils, steep slopes, high fills, and poor subsurface drainage areas.
Smooth Cor™ combines the hydraulic efficiency of smooth-wall pipe with the flexibility and strength of corrugated steel. Compared to reinforced concrete pipe (RCP), it offers:
These advantages make it both an economical and performance alternative to concrete in many drainage applications, particularly in large pipe diameters.
Smooth Cor™ is available in:
Standard pipe lengths range from 20’ feet to 50’.
Smooth Cor™ is available in:
Pipe-arch shapes are commonly used where headroom is limited because the wider profile maintains hydraulic capacity without lowering the invert elevation.
Smooth Cor™ has a Manning’s “n” value of 0.012, comparable to reinforced concrete pipe and other smooth interior drainage systems. This smooth interior helps improve flow capacity and hydraulic efficiency.
Smooth Cor™ utilizes polymer coatings on both the interior liner and exterior shell to help protect against corrosion and abrasion. Some configurations also incorporate Aluminized Steel Type 2 (ALT2) shells depending on project requirements.
Smooth Cor™ systems are designed for long-term durability and can provide a service life exceeding 75 years when properly specified for the site environment and installation conditions.
Smooth Cor™ combines high beam strength with the flexibility of corrugated steel pipe. Unlike rigid concrete structures, it can better accommodate soil movement, settlement, and varying subsurface conditions without compromising structural performance.
Yes. Smooth Cor’s™ lightweight steel construction and long pipe lengths simplify transportation, handling, and installation. Fewer joints and reduced equipment requirements can significantly decrease installation time and overall project costs.
Yes. Smooth Cor™ is an excellent relining solution for deteriorating culverts and storm sewers. Its smooth interior, long lengths, high stiffness, and relatively small outside diameter help preserve hydraulic capacity while extending service life.
Smooth Cor™ can be fabricated into a variety of structures and fittings including:
These prefabricated components often provide improved hydraulics and lower installation costs compared to cast-in-place concrete structures.
Smooth Cor™ is manufactured to applicable ASTM and AASHTO standards including:
It is also designed in accordance with AASHTO LRFD Bridge Design specifications and AISI structural standards.
Key advantages of Smooth Cor™ include:
These benefits make Smooth Cor™ a reliable and cost-effective solution for demanding stormwater infrastructure projects.
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