Storm Sewers | National Corrugated Steel Pipe AssociationTechNote #205 – Method of Water Testing for Appropriate Coating Selection of Corrugated Steel Pipe. Corrugated Steel Pipe (CSP) has been used successfully for storm sewers and culverts since 1896. This success can be attributed to the fact that CSP is structurally strong and is an economical solution due to low material and installation costs.
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