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How is the large diameter thick wall pipe welded?

During the welding of large-diameter thick-walled pipes, the workpiece and the solder melt to form a molten area, and the molten pool is cooled and solidified to form a connection between the materials. In this process, large-diameter thick-walled pipes usually require pressure. There are many energy sources for welding, including gas flame, electric arc, laser, electron beam, friction and ultrasonic waves. Before the end of the 19th century, the only welding process was metal forge welding that blacksmiths had used for hundreds of years. The earliest modern welding technology appeared at the end of the 19th century, first arc welding and oxygen gas welding, and later resistance welding.

In the early 20th century, with the war between the First World War and the Second World War, large-diameter thick-walled pipes demanded a cheap and reliable connection method for military equipment, which promoted the development of welding technology. Today, with the widespread application of welding robots in industrial applications, researchers are still studying the nature of welding in depth and continue to develop new welding methods to further improve welding quality.

Tips:ASTM A106 Seamless Pressure Pipe (also known as ASME SA106 pipe) is commonly used in the construction of oil and gas refineries, power plants, petrochemical plants, boilers, and ships where the piping must transport fluids and gases that exhibit higher temperatures and pressure levels.

 

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