Welding is a fabrication process that joins materials, mostly metals, by using high heat to melt the parts together and allowing them to cool, causing fusion. It is a widely used technique in the fabrication of equipment such as tubes or heat exchangers.
Latest welding news
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The tungsten arc welding concept, originally introduced as a practical tool in 1950, is now established as the most versatile technique for producing fusion welds to the highest quality standards.
NobelClad, an explosion welding company, recently announced that Dr. Edgar E. Vidal has been named global director of business development and marketing.
When high-quality welds are required, orbital TIG welding is the ideal technology for tube-to-tube or tube-to-tube sheet welding applications. With or without filler wire, this is a stable, reliable process that can be used on a wide range of materials such as carbon steel, stainless steel, titanium and nickel and aluminium alloys.
ESAB Welding & Cutting Products will showcase the industry's most complete portfolio of solutions for manual and automated welding and cutting products at EuroBLECH, which is taking place in Hannover, Germany, by the end of October 2018.
KEMPER GmbH is expanding in the Scandinavian region with a new sales partner. iTec AS now exclusively distributes the entire KEMPER product portfolio in Norway.
Parker Aerospace, a business segment of Parker Hannifin Corporation (PH), the global leader in motion and control technologies, plans to use innovative robotic welding techniques to make oil reservoirs for the new CFM International LEAP aircraft engine.
Butt weld pipe fitting is designed to be welded on site at its ends to connect pipes and allow change in direction or pipe diameter, branching or ending.
Stainless steel is a popular material in various industries due to its corrosion resistance, durability, and aesthetic appeal. Here are some key points to consider when welding stainless steel:
Choose the appropriate welding process: There are several welding processes suitable for stainless steel, including Tungsten Inert Gas (TIG) welding, Metal Inert Gas (MIG) welding, and Stick welding (Shielded Metal Arc Welding). TIG welding is often preferred for stainless steel due to its precision and ability to produce high-quality welds.
Prepare the materials: Before welding, it’s important to clean the stainless steel surfaces to remove any contaminants, such as oil, grease, or dirt. Use a stainless steel wire brush or a dedicated solvent to clean the area.
Select the appropriate filler material: When welding stainless steel, it’s generally recommended to use a filler metal that matches or is compatible with the base metal. Commonly used filler materials for stainless steel welding include austenitic stainless steel filler rods or wires, such as ER308, ER309, or ER316.
Set the welding parameters: The welding parameters, such as current, voltage, travel speed, and shielding gas flow rate, will depend on the thickness of the stainless steel and the specific welding process being used.
Ensure proper shielding gas: Stainless steel welding typically requires the use of an inert gas, such as argon or a mixture of argon and helium, to create a protective atmosphere around the weld and prevent oxidation. The shielding gas should be supplied continuously and cover the weld pool adequately.
Maintain good joint fit-up and control heat input: Stainless steel has a relatively low thermal conductivity compared to other metals, so it’s essential to control the heat input during welding. Proper joint fit-up, including gap and root opening, helps control distortion and ensures proper fusion.
Post-weld treatment: Stainless steel welds may require post-weld treatment to restore corrosion resistance. This can involve processes such as passivation or pickling, which remove any oxides or contaminants from the welded area. The specific post-weld treatment will depend on the application and the stainless steel grade used.
It’s important to note that welding stainless steel can be complex, and there may be additional considerations depending on the specific application, grade of stainless steel, and welding codes and standards. If you’re not experienced in welding stainless steel, it’s advisable to consult with a professional welder or seek training to ensure proper techniques and safety precautions are followed.
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