What about Sterile pigging system? Published on December 10, 2018 23:18 by Kayne Babin, Sr.Engineer Pipe/Mech Design LeaderNot for the vessels, but the piping could you use a sterile pigging system to purge out the lines of excess product, we do this with Pharma products? Taxonomy Pipes DesignPipeline Installation & MaintenancePipes and Pipelines