Corrosion and deposit removal is best described as a physical process. These can be improved upon by the use of cleaning solutions and on-line filter separators. Pipeline cleaners help to remove waxes, black powder, grease and solids from pipeline walls during pigging operations. Corrosion inhibitors and oxygen scavengers are required for hydrostatic testing applications and pipeline conservation.
You may be wasting money on your chemical corrosion prevention program if you first don’t clean your pipeline. By cleaning the line, you allow the corrosion inhibition chemicals to reach the surface of the line where they can effectively reduce corrosion rates. In addition, removal of harmful deposits helps reduce the rate of MIC or microbial induced corrosion.
Deposits in pipelines reduce hydraulic efficiency. For a 12-inch line, a smooth 5% deposit buildup reduces throughput by 10%, requiring a 30% increase in operating pressure. When the buildup of deposits is uneven, throughput can drop by 35%, requiring a 140% increase in operating pressure. There are many solutions to remediate pipeline flow problems caused by corrosion and deposit formation; jetting, chemical, thermal, milling, and various combinations of these. To determine which approach addresses your particular pipeline problem the best, please contact Eckard Brandes Inc.