Home Up About Us Contents Contact Us


App.Note 25.

Expandable swaged tubular joins between thin wall tubes

These joins are designed to:

bulletbe made entirely cold without need to apply external or generate internal heat
bulletexceed parent metal strength in torsion
bulletbe capable of secondary radial expansion up to the plastic limits of the tube material without loss of strength within the join


The above pictures illustrate experimental expandable swaged friction joins currently under development for pipe line and oil-well use. The aspect ratios of wall thickness to diameter are similar to midrange OCTG workstring standards.

The initial joins shown above have displayed strengths in torsion of the order of double the yield strength of the basic tubes.

for more information email:

Home About Us Contents Contact Us

The TribTech name derives from  "tribos" - Greek for 'rubbing'. 'TribTech' is a trade name used by Ball Burnishing Machine Tools Ltd. Registered Office 12 Brookmans Av. Hatfield, Herts. AL9 7QJ. United Kingdom;  Company Reg. No. 1408807, VAT Reg. No. 421 6210 04; a knowledge based company that develops, patents and licenses technology based on aspects of  tribology, the science of surfaces. All rights reserved by Ball Burnishing Machine Tools Ltd. Last modified: 29th Sept 2016 copyright 1999/2016. The information and data provided herein should be considered generally representative for the tools and technologies described. In all cases users should carefully evaluate the tools and technologies to determine their suitability for a particular purpose. Be aware this site uses cookies, your continued use implies you accept these.