Bob Baker: About the Author
John H. Carter Co., Inc.

The July/August 2006 issue of the IJ contained Part 1 on the integrity of salvaged, remanfactured and repaired control valves. This second part includes recommendations for the straightforward and efficient identification, abatement, and ongoing organizational awareness of potentially non-compliant control valves. To set the scene for Part 2 for those that might not have seen Part 1 or don't remember it, the introduction portion of this article reiterates the essential elements from part 1.

Control valve damage resulting from severe service applications is typically recognized by visual inspection and corrective action (assuming such repair actions appropriately return the valve to its original design specifications and dimensions as covered in the remainder of this article). However, there are many process applications where gradual degradation of control valve surfaces or thickness may not be noticeably visible, possibly resulting in potential integrity failure (loss of containment) with potential injury or property damage.