The ability to estimate the corrosion rate of buried steel pipe or other components permits pipeline operators to schedule timely re-inspection and mitigation of any anomalies before they can attain critical size. Conventional methods estimate soil corrosiveness, relying on just a few soil parameters, or use coupons or probes to measure quantitative corrosion rates. SoilPro^© by Structural Integrity Associates, Inc. (SI) is a proprietary corrosion model that considers up to 13 different soil parameters — in addition to cathodic protection data — to develop a quantitative estimate of worst-case pitting rate for buried steel. SoilPro uses data on full-size pipe samples buried in 15 different soils in the United States, Canada, and Australia over a five-year period; the model was developed by performing 130,000 regression analyses on 42 datasets to determine soil and cathodic protection attributes most significant to reported pitting rate. With the sole exception of cathodic protection data, all data necessary for applying SoilPro^© can be gleaned from laboratory analysis of a pipeline backfill soil sample, eliminating the need for probes and coupons. SI applies SoilPro^© in a range of pipeline projects, including External Corrosion Direct Assessment (ECDA) projects and buried pipe integrity management programs.

 

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Related Webinars:

• Soil Analysis & Corrosivity Calculations