In-house processes include orbital, spot and manual welding, machining, fabrication, polishing, pickling and passivation as well as ferroxyl and
dye penetrant testing, pressure testing to 110Bar and certificated surface finishing to 0.2Ra.
Keighley Labs covers many mainstream NDT methods, such as magnetic particle crack detection,
dye penetrant testing, ultrasonic flaw detection, magnetic permeability, positive material identification, residual magnetism and ferrite determination, and subcontract radiography.
"Finding trained personnel to hire is difficult, and the training/qualification time is lengthy," said John McGoldrick, technical director for Hodge Foundry, Greenville, Pa., which performs ultrasonic, magnetic particle and
dye penetrant testing in-house.
The company also provides certificated surface finishes to 0.10 [micro]m Ra as well as passivation,
dye penetrant testing and ferroxyl certification.
The company's in-housc processes include machining, orbital and manual welding, fabrication, polishing, pickling, passivation, surface finish, full Ra testing and certification, ferroxyl, pressure and
dye penetrant testing with design and fabrication capabilities ranging from tees, bends, manifolds through to pressure vessels, integrated pipework, process mixing systems and fully automated process equipment.
The company also provides certificated surface finishes to 0.10 mm Ra as well as passivation,
dye penetrant testing and ferroxyl certification.
When working with alloys with a low level of gas, subjecting the sectioned samples to
dye penetrant testing tends to show porosity otherwise nearly undetectable.
The failed riser will usually appear solid at the interface of the casting surface and the riser neck, although shrinkage indications can often be found at this location by magnetic particle or
dye penetrant testing. The fact that the shrinkage is not visually apparent in most cases makes this a very serious defect, one that may not become known until the customer machines the casting.