2013-10-09 09:30:21 - It is a important factor that defects of an internal mezzanine steel.
High-frequency welded pipe production process depends primarily on product variety, from raw materials to finished products need to go through a series of processes, these processes need to complete the appropriate machinery and equipment and welding, electrical control, testing equipment, such equipment and devices according to different there are many reasonable layout process requires high-frequency welded pipe typical process: open-book - strip leveling - head and tail cut - strip butt - Looper storage material - molding - welding - Clear glitch - sizing - testing - fly cut - initial inspection - pipe straightening - pipe processing - pressure test - flaw detection - printing and coating - the finished product.
High-frequency welding is a continuous contact with the workpiece
through the high-frequency current generated by the resistance heating and hot forging force applied in the case, so that the metal parts with each other between a series of welding method, it is similar to ordinary resistance welding but there are many important differences.
High-frequency welding for carbon steel welded pipe production has been 40 years of history have greater power high-frequency welding power, for different materials, the pipe diameter and wall thickness to achieve a higher welding speed (more than TIG's the highest welding speed times more than l0 ) Therefore, the high-frequency welding steel pipe for general use because of high productivity, high-speed high-frequency welding, to the pipe within the burr removal difficult, which is currently high-frequency welded steel pipe still can not for the chemical, nuclear industry accepted one of the reasons to see the material from the welding, high frequency welding of various types of steel can be welded at the same time, the development of new steels and methods of forming the progress of welding.