Mandrel method (Hot Forming)
One of the most common manufacturing methods for manufacturing Elbows from pipes. After heating the raw material, it is pushed over a die called a "mandrel" which allows the pipe to expand and bend simultaneously. Applicable to a wide size range.
Extrusion method (Cold Forming)
Using raw material with the same diameter as finished product, pipe is pushed through a die and formed into its desired shape. Usually applied to stainless steel, small to medium sizes.
"UO" method
After raw material plate is cut out into a specially designed shape, it is shaped first into an U-shape using a die and then into an O-shape (tubular form) using another die, finished with a single weld. Usually applied to stainless steel and non-steel material, small to medium sizes.
"Monaka" method
One of the most used methods for manufacturing Elbows from plates. After two pieces of raw material plates are cut out symmetrically, each piece are press formed and welded together, which somewhat reminds us of the Japanese delicacy, "Monaka." This method is applicable to various materials and can even be applied to large items with diameters over 1 meter. It has two seams and special welding technology in use to meet various standards required by our clients (electricity, gas pressure vessels, etc.,) from whom BENKAN KIKOH Corporation products continue to receive high acclaim.
Hot Forming Die Bending method
After heating raw material pipe, it is press formed and corrected using different dies. The process may be repeated as needed to obtain the required shape, size, wall thickness, etc. Usually applied to thick-wall items that cannot be bent on a mandrel die.