Webinar - LDAR Retag or Revalidate?

On Wednesday, August 26th our own Eric Allen presented on an Industrial Society of Automation (ISA) Webinar titled "Retag or Revalidate? Understanding the Differences + Industry Best Practices and Technology." The Webinar was well-attended, with over 50 call-in users signed in during the presentation, and offered attendees an opportunity to learn about industry-best practices for LDAR retags and new technologies in the industry. Furthermore, Ei educated attendees on a new approach to achieve LDAR inventory compliance which is being pioneered by Ei's powerful new tablet-based EiMOC™ and FieldTech Toolbox™ software, called an LDAR Revalidation.

What is an LDAR Revalidation

During an industry-standard LDAR retag, your contractor hangs all new tags on the LDAR components in the field - a very costly and time consuming process. During an LDAR revalidation, you forego the "start over again" approach of a retag, but instead perform a complete walk-down of every component with highlighted P&IDs and an entire backup of the site's LDAR database - fixing inventory issues on the spot as you identify them. Plainly put: just "fix the issues," and use technology to achieve compliance by ensuring every component is revalidated.

The best part of a revalidation is that the only thing you need is an intrinsically safe tablet running Ei's software - it works with whatever format of drawings you have (CAD format, .PDF, or scanned paper P&IDs) and data from your LDAR database.

Ei's Best Practice Checklist

One of the goals of the presentation was to leave attendees with resources they can use on their next project - irrespective of the contractor or technologies they use. During the presentation, Ei shared a "Best Practice Checklist" for executing these LDAR retag and revalidation projects, broken down into the four main phases of project execution, as follows:

Project Planning

  • Determine scope: retag or revalidate?
  • Acquire the NEWEST version of the P&IDs to highlight
  • Meet with Process Engineering to review chemical speciation
  • List the “Stream Name” on the highlighted P&IDs
  • Develop and agree upon robust project SOPs to guide highlighting, flagging, tagging, and documenting

Project Management

  • Weekly Project Status Updating (WPSU) on flagging, tagging, and documenting
  • Track contractor performance - accountability and project forecasting


  • Ensure EVERY component is walked down (in a Revalidation)
  • Record the tag numbers on the P&IDs
  • Record the “Stream Name” from the P&IDs in the database (for emission estimating)
  • Minimize tag loss
  • Report on each tag gap
  • Track and report on A-Tags to minimize missed tags in the tagging step

After Fieldwork

  • Merge NewTag information with the OldTag history (for retags)
  • Perform field-verification of OldTag - NewTag linking to minimize Title V deviations
  • QA/QC, QA/QC, QA/QC the inventory data
  • Provide field redlines to LDAR coordinator for CAD to review
  • Prepare project closeout report (Final Deliverables)

If you have LDAR inventory or compliance concerns, use this checklist as a guide to ensure you and your contractor are planning on executing an industry-leading project which will achieve compliance, eliminate headaches, and reduce costs!

Download the Presentation, Resources, or Learn More?

  1. View or Download the Presentation (5.2 MB download)
  2. View the Webinar on YouTube (55 minutes)
  3. Download Example Project Tracking Spreadsheet

Interested in learning more or scheduling a quick call to discuss how Ei technology can help you? You can submit a demo request or inquiry and we will get back to you within 24 hours!

Click here for Ei's EiMOC Demo Request