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Spiral welding can be used in the remanufacturing process to repair and improve products. Improvements can be made to the component through this process by using a selection of advanced overlay materials; this is based on two broad criteria: [1] A match of the parent material with a filler wire of the same or closest available selection material.
In 2000, American opened American SpiralWeld Pipe Company in Columbia, South Carolina, diversifying its product line to include spiral-welded steel pipe in diameters up to 144 inches (3,700 mm). In 2015, American began operations at a new spiral-welded pipe production facility in Flint, Michigan. A third facility opened in Paris, Texas, in 2021.
The most common process pipe joint is the butt weld. The ends of pipe to be welded must have a certain weld preparation called an End Weld Prep (EWP) which is typically at an angle of 37.5 degrees to accommodate the filler weld metal. The most common pipe thread in North America is the National Pipe Thread (NPT) or the Dryseal (NPTF
Pipe welding is often performed by specially licensed workers whose skills are retested periodically. For critical applications, every joint is tested with nondestructive methods. Because of the skills required, welded pipe joints are usually restricted to high-performance applications such as shipbuilding, and in chemical and nuclear reactors.
Undercutting is when the weld reduces the base metal's cross-sectional thickness and reduces the strength of the weld and workpieces. One reason for this type of defect is excessive current, which causes the edges of the joint to melt and drain into the weld, thus leaving a drain-like impression along the length of the weld.
This helps fuse the toe of the weld to the base metal. [4] The electrode composition depends upon the material being welded. Alloying elements may be added in the electrodes. Electrodes are available to weld mild steels, high carbon steels, low and special alloy steels, stainless steel and some of the nonferrous of copper and nickel. Electrodes ...
Grinnell grooved products include grooved couplings, grooved fittings, mechanical tees, valves, circuit balancing valves, copper systems, stainless steel systems, plain end systems, HDPE systems, PVC systems, G-PRESS systems, gaskets and spare parts, and preparation equipment, as well as accessories, such as strainers, tee strainers, suction diffusers, dielectric waterway transition fittings ...
Typically one welded element is rotated relative to the other and to the forge (pressed down by axial force). The heating of the material is caused by friction work and creates a permanent connection. In this method, the materials to be welded can be the same, dissimilar, composite [1] or non-metallic materials. Friction welding methods of are ...