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The reality is that steel pipe is the strongest solution out there, and getting stronger. Since the late 1800s, corrugated steel
pipe (CSP) has been serving the stormwater and culvert applications of the engineering world. Today’s steel has a proven service life that exceeds 100 years with the proper specifications.
Throughout NCSPA’s long history, tens of thousands of installations have been the subject of critical evaluation, including the soil side and the water side of pipe, to establish CSP service life guidelines. These studies have shown that predictable service life can be calculated when the appropriate coating and thickness are specified.
There’s a strength that comes from steel’s reliability and when you specify steel, you can be confident that you’ve chosen a quality drainage product.
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ESTIMATED MATERIAL SERVICE LIFE FOR CSP
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Estimated
Service Life |
SITE ENVIRONMENTAL CONDITIONS |
Maximum FHWA Abrasion Level |
CSP Material |
Minimum
100 Years
|
5.0 ≤ pH ≤ 9.0
r > 1500 ohm-cm
|
Level 3
|
Polymer Coated |
| Level 2 |
Aluminized Type 2* |
Minimum
75 Years
|
4.0 ≤ pH ≤ 9.0
r ≥ 750 ohm-cm |
Level 3 |
Polymer Coated |
5.0 ≤ pH ≤ 9.0
r > 1500 ohm-cm |
Level 2 |
Aluminized Type 2 |
Minimum
50 Years
|
3.0 ≤ pH ≤ 12.0
r ≥ 250 ohm-cm
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Level 3 |
Polymer Coated |
Average
50 Years |
6.0 ≤ pH ≤ 10.0
2000 ≤ r ≤ 10,000
ohm-cm
> 50 ppm CaCo3
|
Level 2 |
Galvanized |
* 14 gauge minimum.
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