Integrity of Salvaged, Remanufactured and Repaired Control Valves

The July/August 2006 issue of the IJ contained Part 1 on the integrity of salvaged, remanufactured 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.

Introduction

Depending on equipment age, repair history, application severity and other factors, salvaged/refurbished (aka “remanufactured”) or repaired control valves may no longer meet a manufacturer’s original specifications as designed in accordance with the ANSI/ASME B16.34 control valve standard,“Valves – Flanged, Threaded, and Welding End”.(1)

This is the only available ANSI/ASME standard currently written for control valves; however its scope covers “new” valves. Thus, in the absence of a Standard for “used” control valves (i.e. to include salvaged/refurbished, remanufactured, or repaired) the issue of ensuring sustained integrity, through valve refurbishment to the manufacturer’s design specifications as developed in accordance with the ASME standard, may be overlooked.