Heavy-duty leak testing, sealing, pipe blocking and stopping is easy with Steel Plugs from the Pipestoppers®.
Steel Test Plugs can be used for low pressure testing and plugging pipes, pipelines and pipework fabrications and other orifices between 2 and 48” (50 to 1,200 mm) diameter.
Luke Keane, Technical Sales Manager for HFT®’s Pipestoppers® Division said: “Plugging challenges are a thing of the past with our Steel Plugs range. They provide a strong, leak-free seal with each plug having a long life span.”
“Where plugs might be required to work close to the top of their pressure range and to hold seals longer than would be the case with single plugs, we also manufacture Double Steel Plugs, which increases the capability of the plug.”
When it comes to TIG welding, Tungsten Electrodes are the most important part of the application. A properly ground Tungsten Electrode will help to improve arc starting and stability, giving an overall better performance.
Huntingdon Fusion Techniques HFT® manufactured the TEG-1000 Tungsten Electrode Grinder with a diamond wheel, resulting in clean and smooth finishes, with no splintering and eliminating arc jumping.
Ron Sewell, Chairman for HFT® said: “Grinding Tungsten Electrodes with a dedicated Tungsten Electrode Grinder will help produce a stable arc, which then provides greater tungsten life. Grinding Tungsten Electrodes incorrectly may result in the tip being dropped into the weld pool, which may lead to weld cut-out or rejection.”
In the power generation and nuclear industry, low and medium alloy steels such as SA 213 T91 and SA 335 P91 are chosen for their high strength, but are often prone to cracking during welding. Pre-heating and post-heating reduces the crack sensitivity.
In order to meet the requirements of inert gas purging when temperatures exceed 200ºC (392ºF). The use of purge systems capable of withstanding such high temperatures for lengthy periods is necessary
HotPurge® has been developed by International Weld Purging Specialists Huntingdon Fusion Techniques HFT®. It is an Inflatable Pipe Purging System for use with High Strength Steel Pipe Joints where pre-and post-weld heating temperatures might be as high as 300ºC (572ºF) for lengthy periods.
Typically for closure welds, tight bends, T piece joints and dome end connections where a conventional Tandem Weld Purging System cannot be used, a range of low cost, single ended Inflatable Weld Purge Dams is available for pipe diameters from 6 to 88 inches (150 mm up to 2,235 mm).
Weld Purge Dams from Huntingdon Fusion Techniques HFT® offer a great, lightweight solution where access is difficult, are easy to inflate and heat resistant up to 80oC (176oF).
Ron Sewell, Chairman at Huntingdon Fusion Techniques HFT® said: “Even today, many companies are still allowing their technicians to spend many hours fabricating dams made of foam, cardboard, adhesive tape, wood and so on. Like paper, these materials contain a high percentage of water, which is very undesirable to have in the presence of a weld.
Ceramic Backing Tape is often used to help support weld roots. However, with a melting point of 1,800ºC, concerns grow during TIG welding, where temperatures can reach up to 6,000ºC.
Leaders in Weld Purging Technology, Huntingdon Fusion Techniques HFT® manufacture a range of Weld Backing Tape®, with no true melting point, helping to support weld roots and prevent ‘sugaring’ or ‘grapes’.
Luke Keane®, Technical Sales Manager for Huntingdon Fusion Techniques HFT® said: “Achieving clean welds is easy with Argweld® Weld Backing Tape® available up to 600 amps. Weld Backing Tape® with help protect and support the backside or under side of the joint during welding.”
Weld Purging is the act of removing oxygen from the vicinity of a weld, before, during and after welding reactive metals by displacing the oxygen with an inert gas (usually argon).
When welding stainless steel, the oxygen level must be reduced to a required minimum, which is less than 100 ppm.
The most effective way to know the oxygen level is to measure it with a Weld Purge Monitor®. Leading the way in Weld Purging Monitoring Technology, Huntingdon Fusion Techniques HFT®’s PurgEye® 100 is perfect for obtaining oxide free welds in stainless steel, reading accurately from atmospheric oxygen level (20.94%), right down to 100 ppm (0.01%).
Ron Sewell, Chairman for HFT® said: “It is important not to use alternative low cost oxygen analyzers or other oxygen safety monitors as they are calibrated under ambient conditions and therefore unsuitable for measuring purge levels down to 0.01% as our Award Winning PurgEye® 100 does.”
Inflatable Tube and Pipe Purging Systems simplify the process of inert gas purging by restricting weld purge volumes, making huge savings in time and inert gas.
Huntingdon Fusion Techniques HFT® design and manufacture PurgElite®, a range of low cost Tube and Pipe Purging Systems that help to achieve a clean, oxide free, zero colour weld in just minutes, available from 1” (25 mm).
Ron Sewell, Chairman for HFT® said: “Purging a pipe prior to welding is critical to the success of welding stainless steel, titanium, zirconium and other reactive alloys. PurgElite® systems are simply inserted in the pipe and positioned with the aid of the luminous RootGlo®. When the gas flow is started, the dams inflate, sealing inside the pipe and argon then purges the interspace automatically. A Weld Purge Monitor® connection is standard on each PurgElite®, so the welder can monitor the oxygen content of the purge volume throughout the entire welding process.”
Red tipped thoriated Tungsten Electrodes are said to contain 1.70% to 2.20% thorium. Thorium improves the quality of Tungsten Electrodes but also has a radio-toxic compound posing a risk to welders, particularly during grinding.
Huntingdon Fusion Techniques HFT®’s blue-tipped MultiStrike® Tungsten Electrodes contain a mix of non-radioactive rare earth elements, eliminating the risk to health posed by radio-toxic thoriated Tungsten Electrodes, whilst maintaining a high performing Tungsten Electrode.
Luke Keane, Technical Sales Manager for HFT® said: “Welders today continue to use thoriated Tungsten Electrodes as a cheaper alternative to other safer Tungsten Electrodes, often unaware of the risks. Because MultiStrikes® have no radiotoxic and carcinogenic additives, there is no hazardous dust to be inhaled during grinding of the tips.”
There is an ever-increasing demand in industries such as the Aerospace, Medical and Motorsport for high quality welded titanium components. Often, welding has to be carried out in an environment under 50 parts per million throughout the welding cycle.
Metal glove boxes were previously a big success, however with the lack of flexibility, heavy in weight and high cost to purchase, industries have looked to a more economical alternative.
Flexible Welding Enclosures® designed by Weld Purging Experts Huntingdon Fusion Techniques HFT® provide a low cost option, providing a very fast purging time down to a few parts per million.
The use of Flexible Welding Enclosures® has also increased during development of the Wire Arc Additive Manufacturing process, providing an inert gas shield around the titanium and other reactive alloy components.
Welders often face weld purging difficulties when working under the conditions experienced on-site including exposure to extremes of heat and cold, harmful sand and dust and even hazardous fumes, where an expensive Weld Purge Monitor® may not always be ideal.
Huntingdon Fusion Techniques HFT® have designed and developed the PurgEye® Site, which is manufactured inside a protected secure, safe, waterproof and dustproof, tough carry case, perfect for on-site welding.
Georgia Gascoyne, CEO for HFT® said: “Welding on-site does not eliminate the need to measure oxygen levels when welding metals such as stainless steel, zirconium and titanium. Often, welders are left to guess at purge levels, due to some Weld Purge Monitors® not being able to handle various on site conditions.”
Pipe stopping where access is tight can pose challenges for when duties such as repair work, leak testing and weld purging are required.
Pipestoppers®, a Division of Huntingdon Fusion Techniques HFT® design and manufacture a Range of Mechanical and Inflatable Pipestoppers® and Plugs to suit a variety of applications.
Ron Sewell, Chairman at HFT® said: “The Low Profile Stopper can fit into a pipe end that may be directly on an elbow or just inside a flanged neck on a casting. Other applications include blocking pipe ends to keep gases inside or to keep debris and vermin out.”
“When used in a vertical mode, these Low Profile Stoppers have already been used to prevent machine swarf or tools from falling into pipes, into an unrecoverable and dangerous situation, in a nuclear power steam turbine.”