Because we manufacture tees, elbows and other weld fittings in-house, Nor-Cal Products can also fabricate exhaust weldments and other special assemblies for semiconductor equipment from a single piece of tubing by utilizing some or all of the techniques described below. Welds and other manufacturing steps are eliminated, improving cleanliness and fit while reducing cost. We have demonstrated as much as 30% savings to our customers using this technique.
Nor-Cal Products employs a computer numerically controlled (CNC) tube bender to form elbows and custom exhaust weldments. This enables us to quickly make multiple compound angle bends in a single piece of tubing, while holding .010 inch tolerance between bends. Alternate methods of fabrication require welding of several prefabricated parts, resulting in greater incidence of leaks and cumulative tolerance buildup. Using our method, several welds and other manufacturing steps are eliminated, improving cleanliness and fit, while reducing cost. Nor-Cal Products also has tooling for 3/4, 1, 1 1/2 and 2-inch tubing. Custom or metric tubing diameters are available upon request.
Nor-Cal Products manufactures tees, crosses, valve bodies, ion pump bodies and custom exhaust weldments with ball pulled ports. A hydraulic press is used to pull a ball through a small opening in the tubing to create a smooth, crevice-free opening. The formed metal is then trimmed perpendicular to the centerline of the tube, allowing a straight tube to be welded to the port with a full penetration butt weld. Alternate methods of port fabrication require boring the hole, coping the end of the tube and welding from the outside. Our team can pull ports for ½ to 10 inch diameter tubing, while holding the true position of the port within .030 inch. Inert environment orbital welding is also available for repeatable and precise full penetration flange-to-tube welds. This automated process eliminates the variables associated with hand welding, such as rotation speed and the width of the heat affected zone (HAZ). Orbital welding can be performed on any length tube with diameters from 1/8 to 4 inches.