The industry standard curves included in Info360 Asset's deterioration models are based on data collected and analyzed by the Sustainable Water Infrastructure Management (SWIM) Center at Virginia Tech.
The data was collected from 500 water utilities and 100 federal facilities across the US, covering pipes of many materials - including cast iron, ductile iron, galvanized iron, steel, prestressed and reinforced concrete, asbestos cement, PVC, and HDPE.
To view more detail on the Virginia Tech source data and studies, you can access their congressional reports (requires submitting your name and email).
The industry standard curves available in Info360 Asset deterioration models are listed in the table.
| Material | Diameter | Year Laid (only for Cast Iron) |
|---|---|---|
| Ductile Iron (DI) | < 16 inches | |
| Ductile Iron (DI) | 16-36 inches | |
| Ductile Iron (DI) | > 36 inches | |
| Cast Iron (CI) | < 16 inches | pre 1930 |
| Cast Iron (CI) | < 16 inches | post 1930 |
| Cast Iron (CI) | 16-36 inches | pre 1930 |
| Cast Iron (CI) | 16-36 inches | post 1930 |
| Cast Iron (CI) | > 36 inches | pre 1930 |
| Cast Iron (CI) | > 36 inches | post 1930 |
| Steel | < 16 inches | |
| Steel | 16-36 inches | |
| Steel | > 36 inches | |
| Galvanized Iron (GI) | < 16 inches | |
| Prestressed Concrete Cylinder Pipe (PCCP) | < 16 inches | |
| Prestressed Concrete Cylinder Pipe (PCCP) | 16-36 inches | |
| Prestressed Concrete Cylinder Pipe (PCCP) | > 36 inches | |
| Reinforced Concrete Cylinder Pipe (RCCP) | < 16 inches | |
| Reinforced Concrete Cylinder Pipe (RCCP) | 16-36 inches | |
| Asbestos Cement | < 16 inches | |
| Asbestos Cement | 16-36 inches | |
| Polyvinyl Chloride | < 16 inches | |
| Polyvinyl Chloride | 16-36 inches | |
| High-Density Polyethylene | < 16 inches | |
| High-Density Polyethylene | 16-36 inches |