By using NVision’s Engineering Service Division to capture precise measurements of valves and other hardware, Invensys Operations Management (IOM) saved 60 hours, or about 5 percent in man-hours, during a mechanical upgrade to a steam turbine.
According to the company, IOM usually spends considerable time field-machining upgrade components prior to installation because accurate drawings are not always available. “NVision’s laser scanning provides accurate measurements, reducing engineering time and eliminating the need for field machining,” says Michael Montesinos, senior applications engineer for the Turbo Machinery Group of IOM, Webster, Texas.
IOM’s Turbo Machinery Group provides electromechanical hydraulic upgrades to electrical power generation, oil refining, nuclear, pulp and paper, and chemical plants. Drawings are not usually available for these projects because they have been lost over time or because the OEM that originally installed the equipment restricts access to detailed drawings.
“We decided to work with NVision because they have considerable experience in reverse engineering process and power plants,” Montesinos says.
So, during a recent steam turbine upgrade, NVision technicians visited the plant prior to the upgrade to obtain measurements. The technicians moved the handheld scanner, which is mounted on a mechanical arm, around 16 valves to capture the complete geometry.
NVision provided the geometry of the components to IOM in the SolidWorks file format. IOM engineers and designers used these files as a starting point in designing the upgrade. Based on an earlier test, IOM expects the new equipment to fit perfectly when it is installed, so field machining is not anticipated.