They are commonly used for culverts, stormwater management, drainage systems, and other applications where strength and longevity are crucial. In this article, we will explore the different sizes of corrugated steel pipes, their specifications, and a general price guide to help you choose the right CSP for your project.
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Corrugated steel pipes come in various diameters, thicknesses, and lengths to suit different project requirements. The most common sizes range from small diameters of 6 inches to large diameters of up to 144 inches or more. Here’s a detailed breakdown of the standard sizes and their specifications:
Small Diameter CSP: 6 inches (150 mm) to 24 inches (600 mm)
Medium Diameter CSP: 30 inches (750 mm) to 72 inches ( mm)
Large Diameter CSP: 78 inches ( mm) to 144 inches ( mm) or larger
Corrugation profiles refer to the pattern of ridges and grooves on the pipe, which provide structural strength. Common corrugation profiles include:
2 2/3” x 1/2” (68 mm x 13 mm): Suitable for smaller pipes and light-duty applications.
3” x 1” (76 mm x 25 mm): Standard for most medium-sized pipes.
5” x 1” (125 mm x 25 mm): Used for larger pipes that require additional strength.
9” x 2.5” (229 mm x 64 mm): For extra-large pipes used in heavy-duty applications.
The wall thickness of corrugated steel pipes is measured in gauge. The thickness you choose depends on the load-bearing requirements of your project. Common gauges include:
16 Gauge (1.52 mm): Light-duty applications.
14 Gauge (1.91 mm): Standard for most medium-duty applications.
12 Gauge (2.66 mm): Heavy-duty applications.
10 Gauge (3.51 mm): Extra heavy-duty applications, such as culverts under highways.
CSP is typically available in standard lengths of 20 feet (6 meters) or 24 feet (7.3 meters), but custom lengths can be manufactured based on project requirements.
To enhance durability and resist corrosion, CSP can be coated or lined with various materials:
Galvanized Steel: Standard zinc coating for moderate corrosion resistance.
Aluminized Type 2: Offers better corrosion resistance than galvanized.
Polymer Coating: Provides superior protection against corrosion and abrasion.
Asphalt Lining: Improves hydraulic performance and resistance to corrosion.
Here’s a table showcasing the typical sizes of corrugated steel pipes along with their specifications:
Diameter (inches)Diameter (mm)Corrugation ProfileThickness (Gauge)Standard Length (feet) 2/3" x 1/2", 2/3" x 1/2", " x 1", " x 1", " x 1", " x 1", " x 1", " x 2.5", 24The price of corrugated steel pipes varies based on size, thickness, coating, and other factors. Below is a general price guide:
Galvanized: $10 to $20 per linear foot
Aluminized: $15 to $25 per linear foot
Polymer Coated: $20 to $30 per linear foot
Galvanized: $25 to $50 per linear foot
Aluminized: $30 to $60 per linear foot
Polymer Coated: $35 to $70 per linear foot
Galvanized: $50 to $100+ per linear foot
Aluminized: $60 to $120+ per linear foot
Polymer Coated: $70 to $140+ per linear foot
Material Costs: Steel prices fluctuate, impacting the overall cost of CSP.
For more information, please visit Corrugated Steel Culvert Pipe.
Coating and Lining: Additional coatings, such as polymer or asphalt lining, increase the cost.
Transportation: Shipping large-diameter pipes can be expensive due to their size and weight.
Custom Sizes: Non-standard sizes or lengths may result in higher costs due to special manufacturing processes.
When selecting a corrugated steel pipe for your project, consider the following:
Load Requirements: Determine the weight and pressure the pipe will need to withstand.
Environmental Conditions: Consider the potential for corrosion, abrasion, and exposure to chemicals.
Hydraulic Needs: Choose a size and lining that provide the necessary flow capacity.
Budget: Balance the specifications with your project budget to find the best solution.
Corrugated steel pipes are versatile and durable solutions for many infrastructure projects. Understanding the various sizes, specifications, and pricing will help you make an informed decision for your next project. Whether you need a small diameter pipe for drainage or a large diameter pipe for a culvert, there is a CSP option that meets your requirements. Always consult with a trusted supplier to ensure you choose the right corrugated steel pipe for your specific needs.
Corrugated metal pipes (CMPs) are some of the most commonly used materials for underground stormwater infrastructure. They go largely unnoticed, but are necessary to support the daily functions of our lives by properly moving water to avoid issues like water ponding, standing water on roadways, and localized flooding.
CMPs are used for various underground infrastructure projects such as culverts, stormwater detention/retention systems, storm sewers, small bridge replacements, aeration pipes, material conduits, and more.
CMPs can require frequent maintenance and repairs if they aren't given adequate protection through the use of things like structural polymeric linings. Keep reading to learn about CMPs, 3 common issues they face, and how to fix them!
Corrugated metal pipes
A corrugated metal pipe (CMP) is a pipe—used for culverts and other underground infrastructure—that has a distinct set of parallel grooves and ridges.
As mentioned, they're most commonly used for drainage culverts, storm sewers, material conduits, and other underground stormwater conveyance infrastructure pieces.
CMPs are commonly manufactured out of aluminum and steel, with different metallic coatings and alloys designed for different applications.
Aluminum alloy CMPs are designed to resist the effects of corrosion and abrasion underground. The surface of the core is coated with a higher-grade aluminum alloy.
Aluminized steel CMPs are manufactured by hot-dipping steel CMPs in commercially pure aluminum. These pipes can be effective at combating corrosion, in particular for culverts and drainage systems that involve acidic water.
Galvanized steel pipes are manufactured using a process called—you guessed it—galvanizing. Galvanizing involves applying a zinc coating to the pipe, thus protecting the base layer of steel from corrosion. Typically less effective than aluminized steel, the zinc helps protect from corrosion by acting as a barrier between water and the steel, reducing the effects of rusting and deterioration for the short term.
Asphalt-coated galvanized steel pipes are similar to galvanized steel pipes, but they're coated on the interior and exterior with asphalt to delay corrosion and deterioration for a longer period. The asphalt, in combination with the zinc coating, provides additional abrasion resistance and helps to prevent water, debris, and abrasive run-off from reaching the base layer of steel.
Polymeric coatings and structural linings are emerging as great options in the industry to help CMPs stay sealed and strong. Polymeric coatings protect against abrasion from acids, salts, alkalis, and other materials that threaten CMPS in culverts and sewers.
CMPs
Corrugated metal pipe joints are the areas/pieces that connect different adjacent sections of pipe. These areas can be a source of problems if they are opened due to misalignment. In these scenarios, backfill material can erode into the pipe, causing structural deterioration and eventually failure if left untreated.
To fix open joints, a process called joint sealing is carried out. It's as simple as it sounds—the joint is sealed off to prevent unwanted material from entering. Polymeric linings are great for joint sealing, providing structural rigidity against soil intrusion and hydrostatic pressure
Voids are unwanted gaps/spaces between the CMP and the soil. They're addressed by using polyurethane grouting to fill the void and using polymeric linings to seal/strengthen the CMP.
The invert of a corrugated metal pipe is the lowest point within the pipe that water flows across.
Since this is where the water makes the most contact with the pipe, it's especially susceptible to abrasion during peak stormwater events and corrosion over time if left unprotected. Deteriorated CMP inverts are likely the most common and frustrating corrugated metal pipe problems that underground infrastructure professionals face. If the pipe doesn't have a long-lasting, abrasion-resistant corrosive protective agent like a polymeric lining, it can rust through.
Once the invert rusts through, other serious problems can occur like voids or even total structural failure.
While there may be numerous approaches available in the market, many professionals are starting to see the advantages of trenchless pipe repair.
Trenchless pipe repair means fixing underground pipes from the inside. These projects can be carried out to completion within a few working days, far shorter than digging from the surface and ripping up roadways to get to the pipes.
Polymeric linings—as mentioned in the Corrugated Metal Pipe problems section before—are a great trenchless solution for CMP repair and rehabilitation.
Underground infrastructure—supported by things like CMPs—is vital to our society, so it's important that we keep it protected.
Trenchless repair methods for corrugated metal pipes are proving to be the superior solutions when applicable, as they save communities time and money through long-lasting solutions and minimal disruptions.