Blogs - Huntingdon Fusion Techniques HFT®

Made in Britain Awards: We Made It to the Finals!

We are excited to share that Huntingdon Fusion Techniques (HFT) was recently shortlisted for the prestigious UK Exporter of the Year award! While we didn’t take home the trophy this time, being recognised as a finalist among some of the top names in the industry is a tremendous honour and a proud moment for our entire team. […]

Welding Knowledge - Part 1: A Guide to Principal Arc Welding Processes

Overview of Arc Welding Processes Arc welding is a group of techniques used to join metals by generating intense heat through an electric arc between an electrode and the metal workpieces. Among the many arc welding processes available, four are predominantly used due to their effectiveness and control: Gas Tungsten Arc Welding (GTAW/TIG), Gas Metal […]

Welding Knowledge - Part 4: How Welding Can Reduce Corrosion Resistance

The Importance of Corrosion Resistance in Stainless Steel Applications Stainless steels are prized across many industries for their corrosion resistance. This quality is essential in dairy, food processing, pharmaceuticals, and semiconductor manufacturing sectors, where contamination can have severe consequences. However, if not managed correctly, the welding process can compromise this vital property. Understanding the Mechanism […]

Welding Knowledge - Part 3: Small Diameter Tube Welding

Challenges in Small Diameter Tube Welding Welding small-diameter metal tubes, particularly those with diameters less than 15 mm, poses unique challenges not typically encountered in larger welding applications. Maintaining consistent weld quality is difficult, even with mechanized processes. Additionally, achieving effective internal weld purging with inert gas is essential to prevent oxidation at the weld […]

Welding Knowledge - Part 2: Introduction to Stainless Steels

Understanding Stainless Steels Contrary to popular belief, stainless steel is not entirely impervious to staining or corrosion. In certain environments, such as those exposed to saltwater, discolouration and corrosion can occur. Even in domestic settings, stainless steel can develop dark spots, particularly from the mild salt solutions used in automatic dishwashers. The global importance of […]

Seven Tips for Effective Inert Gas Weld Purging

Inert gas weld purging is a crucial process in welding, especially for metals prone to oxidation, such as stainless steel and Zirconium alloys. Proper purging displaces oxygen from the weld zone, preventing oxidation, which can compromise the weld’s corrosion resistance and strength. This guide provides seven practical tips for achieving effective weld purging, ensuring high-quality […]

Case Study: Welding of Zirconium and Its Alloys

Zirconium and its primary alloy, Zircaloy, are distinguished by their remarkable physical properties, including mechanical strength, corrosion resistance, and high-temperature stability. These characteristics make them ideal for various industries, such as biochemical, nuclear, aerospace, and petrochemicals. This case study explores the applications of Zirconium alloys, the preparation and techniques involved in welding them, and the […]

Weld Purging on LNG Projects: Flexible Discs vs. Inflatable Seals

This case study examines the critical role of weld purging in the LNG (liquefied natural gas) industry, where the quality and integrity of welds are paramount. Despite the availability of advanced weld purging systems designed to prevent oxidation and contamination, many fabricators still rely on outdated and ineffective methods, leading to subpar weld quality and […]

Case Study: Shielding Gas and Purging Techniques during Welding - Part 4

The final part of Dr. Fletcher's series emphasises the importance of maintaining low oxygen levels in the purge gas during welding to ensure defect-free welds, especially for sensitive materials like titanium and certain stainless steels. The Importance of Low Oxygen Levels:Maintaining a low-oxygen environment is essential to prevent weld contamination. The tolerable oxygen level varies […]

Case Study: Shielding Gas and Purging Techniques during Welding - Part 3

In the third part of Dr. Fletcher's series, the focus shifts to using welding enclosures and trailing shields to prevent contamination during welding, mainly when working with materials sensitive to atmospheric gases. Welding Enclosures:Traditional metal enclosures, often used for sensitive welding processes, are effective but costly and cumbersome. Flexible Welding Enclosures made from advanced engineering […]

Shielding Gas and Purging Techniques during Welding - Part 2

In the second part of Dr. Fletcher's series, the focus shifts to proper pipe and tube welding purging techniques. Effective pre-purging and weld purging are critical to ensuring weld quality, particularly in high-stakes applications involving sensitive alloys like stainless steel and titanium. Pre-Purge Process:The pre-purge process displaces air within the pipe or dam before welding, […]

Case Study: Shielding Gas and Purging Techniques during Welding - Part 1

The first part of Dr. Fletcher's four-part series on welding examines the critical role of gas control in maintaining weld quality, particularly for stainless steels and titanium alloys. Proper shielding and purging gases are essential to protect the weld from oxidation and maintain corrosion resistance. The study explores various gas options: Different recommendations exist for […]

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