Corrugated Steel Pipe has been used successfully in storm sewer applications since the early 1900s. Countless miles of CSP provide reliable service throughout the highway system and in all sizes of cities and municipalities.
As the need for cost-effective, durable infrastructure has grown over the years, the corrugated pipe industry has responded.
Technological advancements provide more hydraulically efficient profiles and highly durable coatings, such as spiral rib pipe, polymer coatings, aluminized Type 2 steel and 4-ounce galvanized.
These improvements have dramatically increased the usage of CSP in storm sewer applications.
Strength of Steel
CSP storm sewers maintain the advantage of the strength of steel with a variety of coatings providing long service life. With allowable fill heights over 100 feet and minimum covers as low as 12 inches, CSP can be matched to the strength required. Established long-term materials properties ensure product performance throughout the design life.
Durability of Coatings
Storm sewer systems, in general, have an environment with little or no abrasion and limited time of wetness. These factors, along with a variety of coating systems, mean CSP can meet any service life requirement. Galvanized, aluminized and polymer-coated CSP are just a few of the coating options. Expected service life can be determined using the NCSPA Service Life Guidelines.
Cost and Installation Advantages
CSP provides the lowest installed cost compared to other materials. This is due to the low up-front material costs plus the added advantages of reduced installation costs, especially in large diameters. CSP is one-tenth the weight of reinforced concrete pipe (RCP) and comes in lengths of 20 feet or longer. Add this to fewer joints and easy, positive connections and it equals an installation cost advantage.
|Table of Weights (lbs/ft)|
|Dia||2-2/3 x 1/2|