OverviewALT2 ApplicationsDOT InformationSuccess StoriesResources
Aluminum Coated Type 2
![corrugated steel pipe detention system large volume detention system](https://ncspa.org/wp-content/uploads/2019/01/DelanoTurf-PDF-003_20190118110238014_compressed-300x180.jpg)
Aluminum coated type 2 CSP has been installed at thousands of sites over the past 50 years and many of these sites have been and are still being monitored for performance. Recent AK Steel research has indicated that 14 gage ALT2 CSP can achieve a 100-year service life when the environmental conditions have a pH of 5 to 9 and a resistivity greater than 1500 ohm-cm.
For more information download our Pipe Selection Guide found here.
ALT2 Applications
DOT Information
The below is a map of the states that currently accept ALT2 coated pipe and plate in their specs.
Success Stories
![rainwater harvesting](https://ncspa.org/wp-content/uploads/2016/05/art1-2.jpg)
CSP Offers Benefits in Rainwater Harvesting
Have you ever considered rainwater harvesting for irrigation, non-potable uses or just for LEED credits? Did you know that corrugated steel pipe (CSP) can be ... Read more
![deep corrugated steel arch](https://ncspa.org/wp-content/uploads/2016/05/art4-1.jpg)
Deep Corrugated Steel Arch Provides Minimal Disruption on New Mexico State Highway
To gain access to a new coal seam, the El Segundo Coal Company (A Peabody Energy Subsidiary) needed to move heavy mining equipment across New ... Read more
![deep corrugated structural plate](https://ncspa.org/wp-content/uploads/2016/05/art2-3.jpg)
Deep Corrugated Structural Plate Offers Innovative Bridge Solutions
Soil Steel Bridges offer an innovative approach with many benefits. These bridge structures are ideal for grade separations or hydraulic applications and are less expensive ... Read more
Studies, Resources & Marketing Materials
- The Measured Performance of Aluminized Type 2 Steel Pipe in Storm Sewer Applications in the North Georgia Region – A research project on the durability of Aluminized Steel Type 2 pipe
installed in the metro Atlanta area has resulted in an outstanding report of the product’s performance.
- Durability of Aluminized Type 2 Corrugated Steel Pipe Exposed Throughout the United States – A report by Elzly Technology Corporation documenting the performance and environmental conditions of aluminized type 2 coated CSP in 11 states and parts of Canada.
- Service Life – ALT2 Field Reports
- EFFECTS OF GAGE ON PIPE DURABILITY: Based on 75 Years Minimum Service Life at 16 Gage – For Worst-Case Conditions Within The Recommended pH/Resistivity Ranges
- Meeting New Durability Standards and Expanding Environmental Limits with Corrugated Steel Pipe
- The Measured Performance of Aluminized Type 2 Steel Pipe in Storm Sewer Applications in the North Georgia Region – A research project on the durability of Aluminized Steel Type 2 pipe