What is Proper Thread Engagement?

ETHOS Process Safety Solutions, February 10, 2023

35 Likes

Interview with Dave Godfrey, INTEGRA Technologies

Online Article

Leak related problems in bolted assemblies are an ongoing issue for virtually all facilities in the chemical, petrochemical, and refining industries. From leak detection to leak prevention, operators need knowledgeable and experienced technicians to...
The Pathway to ASME PCC-1 2013 Appendix A Compliance and its Critical Importance

May/June 2014 Inspectioneering Journal

In November 2013, ASME released its updated PCC-1 guidelines for pressure boundary bolted flange joint assemblies. Contained within the document is Appendix A, which represents a major change from the previous 2010 release and is considered to be...
Inspection of Relief Devices per API RP 576

March/April 2018 Inspectioneering Journal

This article demonstrates the process of converting API RP 576, Inspection of Pressure-Relieving Devices, into a work process that is suitable for conversion into a job procedure. It also explores some lessons learned that will make the document...
Best Practices of a Joint Integrity Program

March/April 2014 Inspectioneering Journal

Joint integrity programs (JIP) should be an integral part of every refinery, petrochemical, production, or other industrial-complex facility operations.
Obtaining Leak Free Bolted Joint Operation by Returning to Basics

September/October 2009 Inspectioneering Journal

Leakage of pressure vessel and piping bolted joints in refineries is an unnecessary hazard, with high associated cost, that can be easily rectified using currently available technology. There have been advances in gasket testing technology in recent...

In this video, we address a commonly asked question about the requirement for two threads to be showing outside the nuts for flange bolted joint assemblies in codes, standards, or recommended practices. We invite viewers to share any additional guidance on this topic in the comments section.

Comments and Discussion

Posted by Jason Kaufman on February 13, 2023

Definitely a topic with lots of interpretations.... Log in or register to read the rest of this comment.

Posted by Andy Schulte on February 13, 2023 (Edited on February 13, 2023)

NBIC part 1. 2.10.1.e - The end of the bolt... Log in or register to read the rest of this comment.

Posted by Reynaldo Mejias on February 13, 2023

Great topic, also if you are performing an... Log in or register to read the rest of this comment.

Posted by Michael Fisher on February 14, 2023

I always heard and found the rules that are... Log in or register to read the rest of this comment.

Posted by Troy Green on February 14, 2023

Definitely a hot topic. Often, Corporate... Log in or register to read the rest of this comment.

Posted by Mark Gharghoury on February 14, 2023

More than two threads exposed is also not... Log in or register to read the rest of this comment.

Posted by David McGrath on February 15, 2023

Industry standard for years was two - five... Log in or register to read the rest of this comment.

Posted by Georgiy Volkov on February 16, 2023

Federal Highway Administration, “Guidelines for... Log in or register to read the rest of this comment.

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