Huntingdon Fusion Techniques

Technical Papers

World Pipelines - Inert Gas Purging with Orbital Welding

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By Dr Michael J Fletcher

Inert Gas Purging with Orbital Welding (World Pipelines - Global Energy)

It is often difficult to meet requirements for quality using manual welding. Orbital welding has become an essential process with many tube and pipe fabrications since modern equipment can be fully automatic and reliable and offers repeatable results.

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Performance of TIG Electrodes

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By P C J Anderson at The Welding Institute - Technical Paper Report Nº 220177193

Performance of TIG Electrodes (incorporating MultiStrike™ Tungstens)

The increased use of mechanised and fully automated TIG welding techniques has highlighted the demand for improved performance from the tungsten electrode.

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Repeatable Results

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Dr Michael Fletcher of Delta Consultants discusses experience with weld purging on stainless steel pipes.

Few would disagree with the fact that making high quality welds in stainless steel demands skill.

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Gas Purging for Weld Root Control during Pipeline Fabrication

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Presention at Kuwait Conference

As we entered the 21st C we were made all too familiar with demands to reduce manufacturing costs. Remaining competitive in what had become a global rather than a national economy became a driving force when examining production methods.

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Need for Weld Purity Drives Purging Methods

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Design, fabrication, and maintenance practices that can meet exacting purity requirements of ASME 31.3 are crucial to the food, pharmaceutical, and semiconductor industries 

By Dr Michael J Fletcher

Demands for improvements in piping fabrication quality have risen exponentially in recent years.

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Optimizing Tungsten Electrode Performance

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Proper preparation can lead to an increase in electrode life and better welds.  Optimizing Tungsten Electrode Performance.

By Dr Michael J Fletcher

While hand grinding can be tolerated in some circumstances, producing welds for safety-critical applications and where weld properties must meet stringent inspection criteria needs a more controlled approach. Following are some tips for optimizing electrode preparation, which can lead to a significant increase in electrode life.

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Advances in Weld Protection during Fabrication of Stainless Steel Tubes

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Welding Design and Fabrication MagazineWelding Design and Fabrication Magazine

Maximum levels of oxygen in purge gas will prevent weld underbead discolorization and loss of corrosion resistance.

Jun 11, 2011 1:09 AM

Inert gas purging to prevent discoloring of the weld underbead and loss of corrosion resistance is relatively common during fabrication of stainless steels. For the welder however there is very little quantitative published information available with respect to quality of purge gas and types of purge techniques. This review proposes maximum oxygen levels in the purge gas to ensure absence of contamination. It also critically analyses commercially available products which have been proven to reduce the time and cost of the purging process.

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