--- title: Single Pass Flange Bolting......How it works description: Single Pass Flange Bolting......How it works image: https://blog.appliedbolting.com/hubfs/14inch-flange-PXL_20210301_160443726-scaled.jpg --- [![Applied Bolting](https://blog.appliedbolting.com/hubfs/image%201-1.png)](https://appliedbolting.com/) [DISTRIBUTOR LOGIN](https://appliedbolting.com/distributor-hub/) [FIND A DISTRIBUTOR](https://appliedbolting.com/distributor-locator/) [CONTACT US](https://appliedbolting.com/contact-us/) [PDH CERT](https://appliedbolting.com/request-a-certificate/) ☰ [Squirter® DTI](https://appliedbolting.com/squirter-dtis/) [Bolting Resources](https://appliedbolting.com/bolting-resources/) [Bolting Methods](https://appliedbolting.com/bolting-methods/) [Manufacturing Specifications](https://appliedbolting.com/wp-content/uploads/2025/10/Direct-Tension-Indicator-DTI-Manufacturing-Standard-Specification-1.pdf) [DTI Dimensions, Standards & Specs](https://appliedbolting.com/wp-content/uploads/2025/10/DTI-DIMENSIONS-PER-APPLICABLE-STANDARDS-AND-SPECIFICATIONS.pdf) [Lunch and Learn](https://appliedbolting.com/lunch-and-learn/) [Tech Support](https://appliedbolting.com/tech-support/) [Careers](https://appliedbolting.com/careers/) [SWAG Store](https://inkfactoryclothing.chipply.com/AppliedBolting/store.aspx?action=viewall) [DISTRIBUTOR LOGIN](https://appliedbolting.com/distributor-hub/) [FIND A DISTRIBUTOR](https://appliedbolting.com/distributor-locator/) [CONTACT US](https://appliedbolting.com/contact-us/) [PDH CERT](https://appliedbolting.com/request-a-certificate/) ![Single Pass Flange Bolting......How it works](https://blog.appliedbolting.com/hubfs/14inch-flange-PXL_20210301_160443726-scaled.jpg) # Single Pass Flange Bolting......How it works - Home - [Applied Bolting Blog](https://blog.appliedbolting.com/applied-bolting-blog) - Single Pass Flange Bolting......How it works [Rob Westover](https://blog.appliedbolting.com/applied-bolting-blog/author/robw) 05/14/2021 [Squirter® DTIs](https://blog.appliedbolting.com/applied-bolting-blog/tag/squirter-dtis) [0 Comments](https://blog.appliedbolting.com/applied-bolting-blog/2021/05/14/single-pass-flange-bolting-how-it-works#postComment) 1 Minutes Tighten a Flange in a Single Pass...Most people in the flange bolting industry would say, Impossible! But it can be done and we didn't think of it first. In the early 1990s, BP America and The Pressure Vessel Research Council (PVRC) sponsored the University of Akron Ohio, to develop a way to improve flange bolt-up procedures, using experimentally determined elastic interaction coefficients\*. The study resulted in a way to fully torque a flange, in a single tightening pass, while achieving uniform bolt stresses around the flange. The groundbreaking procedure was made possible, by determining and compensating for elastic interaction between all bolts, within a flange. Watch the below video on how it all works, if you have questions or want to see a live demo email us at flange@appliedbolting.com or give us a call, we can set up a live in office demonstration or from your preferred media platform. https://youtu.be/yMrieQoErcQ \*1 Bibel, G. D. and Ezell, R.M. “An Improved Flange Bolt-Up Procedure Using Experimentally Determined Elastic Interaction Coefficients,” Journal of Pressure Vessel Technology 114 (Nov. 1992): 439-443.2 --- #### Tag: [Squirter® DTIs](https://blog.appliedbolting.com/applied-bolting-blog/tag/squirter-dtis) #### Share: - [Follow us on Facebook](http://www.facebook.com/share.php?u=https://blog.appliedbolting.com/applied-bolting-blog/2021/05/14/single-pass-flange-bolting-how-it-works) - [Follow us on Twitter](https://twitter.com/intent/tweet?url=https://blog.appliedbolting.com/applied-bolting-blog/2021/05/14/single-pass-flange-bolting-how-it-works&text=Single%20Pass%20Flange%20Bolting......How%20it%20works) - [Follow us on Linkedin](http://www.linkedin.com/shareArticle?mini=true&url=https://blog.appliedbolting.com/applied-bolting-blog/2021/05/14/single-pass-flange-bolting-how-it-works) - [Follow us on Pinterest](http://pinterest.com/pin/create/button/?url=https://blog.appliedbolting.com/applied-bolting-blog/2021/05/14/single-pass-flange-bolting-how-it-works&text=Single%20Pass%20Flange%20Bolting......How%20it%20worksdescription=Tighten%20a%20Flange%20in%20a%20Single%20Pass...Most%20people%20in%20the%20flange%20bolting%20industry%20would%20say,%20Impossible!%20But%20it%20can%20be%20done%20and%20we%20didn't%20think%20of%20it%20first.%20In[...]&media=https://8020600.fs1.hubspotusercontent-na1.net/hubfs/8020600/14inch-flange-PXL_20210301_160443726-scaled.jpg) --- ###### [DuraSquirt® Target Stress DTIs Previous Post](https://blog.appliedbolting.com/applied-bolting-blog/2021/04/26/durasquirt-target-stress-dtis) ###### [University of Houston Studies DuraSquirt® Single Pass Flange Tightening Next Post](https://blog.appliedbolting.com/applied-bolting-blog/2021/05/26/university-of-houston-studies-durasquirt-single-pass-flange-tightening) This is a search field with an auto-suggest feature attached. - There are no suggestions because the search field is empty. ### Category - [Squirter® DTIs (20)](https://blog.appliedbolting.com/applied-bolting-blog/tag/squirter-dtis) - [Bolting (11)](https://blog.appliedbolting.com/applied-bolting-blog/tag/bolting) - [Tension (7)](https://blog.appliedbolting.com/applied-bolting-blog/tag/tension) - [Torque (5)](https://blog.appliedbolting.com/applied-bolting-blog/tag/torque) - [Case Study (4)](https://blog.appliedbolting.com/applied-bolting-blog/tag/case-study) ### Popular Posts [chris curven](https://blog.appliedbolting.com/applied-bolting-blog/author/chrisc) 03/17/2021 [Bolting](https://blog.appliedbolting.com/applied-bolting-blog/tag/bolting), [Torque](https://blog.appliedbolting.com/applied-bolting-blog/tag/torque), [Tension](https://blog.appliedbolting.com/applied-bolting-blog/tag/tension), [Squirter® DTIs](https://blog.appliedbolting.com/applied-bolting-blog/tag/squirter-dtis), [Structural Steel](https://blog.appliedbolting.com/applied-bolting-blog/tag/structural-steel), [Case Study](https://blog.appliedbolting.com/applied-bolting-blog/tag/case-study), [Safety](https://blog.appliedbolting.com/applied-bolting-blog/tag/safety) [Cold Weather: Our Squirter® DTIs With DuraSquirt® Formula Still Work!](https://blog.appliedbolting.com/applied-bolting-blog/2021/03/17/cold-weather-our-squirter-and-durasquirt-dtis-work) [Clara Moses](https://blog.appliedbolting.com/applied-bolting-blog/author/clara-moses) 09/30/2025 [Bolting](https://blog.appliedbolting.com/applied-bolting-blog/tag/bolting), [Squirter® DTIs](https://blog.appliedbolting.com/applied-bolting-blog/tag/squirter-dtis) [Made in America: How Squirter® DTIs Deliver Quality and Reliability](https://blog.appliedbolting.com/applied-bolting-blog/made-in-america) [Rob Westover](https://blog.appliedbolting.com/applied-bolting-blog/author/robw) 08/17/2021 [Squirter® DTIs](https://blog.appliedbolting.com/applied-bolting-blog/tag/squirter-dtis) [Hot Bolting - Single Stud Replacement](https://blog.appliedbolting.com/applied-bolting-blog/2021/08/17/hot-bolting-single-stud-replacement) [Clara Moses](https://blog.appliedbolting.com/applied-bolting-blog/author/clara-moses) 12/14/2025 [Bolting](https://blog.appliedbolting.com/applied-bolting-blog/tag/bolting), [Tension](https://blog.appliedbolting.com/applied-bolting-blog/tag/tension), [Squirter® DTIs](https://blog.appliedbolting.com/applied-bolting-blog/tag/squirter-dtis) [The Science of Bolt Tension You Can See: How Squirter® DTIs Are Made](https://blog.appliedbolting.com/applied-bolting-blog/the-science-of-bolt-tension-you-can-see-how-squirter-dtis-are-made) --- ## Related Posts Want to keep learning more? Check out other blogs we’ve written on similar topics. ### MADE IN AMERICA ![Made in America](https://blog.appliedbolting.com/hubfs/ascMadeInUSAv2-1.png) ### SPECIFY IT! Add the following statement to your structures bolting specification. All High Strength Structural Bolts shall include an F959(M) DuraSquirt® DTI, quenched and tempered in accordance with ASTM F959 section 4.3.2, manufactured by Applied Bolting Technology™, and installed and inspected, per their instructions. ![Applied Bolting](https://blog.appliedbolting.com/hubfs/abtLogoStacked.png) ![Portland Bolt](https://blog.appliedbolting.com/hubfs/portlandBoltLogo-1.png) Applied Bolting Technology™ is now a proud member of the Portland Bolt family of companies. **1413 Rockingham Road Bellows Falls, Vermont, USA 05101** US & Canada: **1.800.552.1999** | International: **1.802.460.3100** ©2026 Applied Bolting Technology™ | APPLIED BOLTING TECHNOLOGY™, the Bolt Icon®, the Color Orange™, DuraSquirt®, Squirter®, Squirt™, SEE THAT THE BOLTS ARE TIGHT™, THE BEST WAY TO BOLT™, and VISUAL VERIFICATION OF BOLT TENSION are Trademarks or Registered Trademarks of Applied Bolting Technology Products, LLC. ```json { "@context" : "https://schema.org", "@type" : "BlogPosting", "author" : { "@type" : "Person", "name" : "Rob Westover", "url" : "https://blog.appliedbolting.com/applied-bolting-blog/author/robw" }, "dateModified" : "2025-12-05T16:08:41.286Z", "datePublished" : "2021-05-14T17:45:29.000Z", "headline" : "Single Pass Flange Bolting......How it works", "image" : [ "https://blog.appliedbolting.com/hubfs/14inch-flange-PXL_20210301_160443726-scaled.jpg" ], "mainEntityOfPage" : { "@id" : "https://blog.appliedbolting.com/applied-bolting-blog/2021/05/14/single-pass-flange-bolting-how-it-works", "@type" : "WebPage" }, "publisher" : { "@type" : "Organization", "logo" : { "@type" : "ImageObject" }, "name" : "Applied Bolting Technology" } } ```