Selected articles from September 2013 issue published on TheFabricator.com:
Fabricators have quite a few bending processes to choose from—rotary draw, compression, hydraulic ram, and so on—and the variety of bent components is infinite. Matching a process to a specific application isn’t easy, and only will become more difficult as the use of tube and profiles continues to spread. This paper shows how fabricators can classify bend criteria to determine the optimal process.
Blasting cleaning can be done by either a rotating wheel or an air nozzle, with a variety of abrasive media depending on the surface finish needed. The machines come in five formats: skew roll, multibar, upblast, downblast, and airblast. Understanding the types of machine available and how they work is the first step in deciding which type is needed for your particular applications.
Nuclear power plants use a lot of water to cool the reactors, and when the water intake unit occasionally pulls in a sea lion or a shark, environmentalists go nuts. Dimic Steel Tech bid on a contract to build two huge grates for Southern California Edison to keep marine life out of the water intakes, and had to learn a bit about welding corrosion-resistant steel along the way.
For tube and pipe producers, testing the product on the mill is necessary, but not necessarily optimal. The line speed might be too slow, the mill might have some maintenance issues, and other factors can interfere with online testing. For these reasons, many supplement the online test with an offline test.
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