Services Overview, Field Testing & Diagnostics
Reciprocating and Rotating Equipment
A significant amount of EDI’s field testing is performed on reciprocating compressors and pumps, and rotating equipment such as centrifugal compressors and centrifugal pumps. Solutions of problems ranging from piping vibration to impellar failures are some of the types of problems EDI specializes in.
Torsional vibration is oscillatory angular motion that causes twisting in shaft sections and couplings of machinery. These fluctuations are superimposed on the steady running speed. High torsional vibration can be destructive and will not usually be detected by accelerometers and proximity probes commonly used to measure lateral vibration.
Piping vibration is caused by forces imposed on it by operation of equipment, most often induced by pressure pulsation. Generally, the severity of vibration of piping and structures is evaluated using accelerometers, and where fatigue may be an issue, strain gages may be used.
Pressure Pulsation Measurement
Pulsation is the change in pressure with time. Pulsation causes piping vibrations and structural vibration, which can result in support degradation and fatigue failures. Dynamic pressure transducers are used to evaluate pulsation characteristics.
Compressor Frames, Skids, and Foundations
Compressor frames, skids, and foundations are subjected to dynamic forces induced by the compressor inertial shaking forces and pulsation induced forces which can cause excessive vibration.
Large Size VFD Performance Analysis
VFD performance measurements are a critical part of commissioning today’s modern large scale variable speed motors and validation as to long term use acceptability.
EDI maintains a full range of instrumentation for use in diagnostic studies.
Flow Induced Vibration
Vortex shedding is due to flow over an obstruction in the flow path. At certain flow velocities, the fluid boundary layer at the trailing edge will separate, or cause vortices that are shed from either side of the obstruction.
Continuous Remote Monitoring
Continuous monitoring is becoming more prevalent as operating companies strive to improve availability and reliability of key machinery assets. Another important factor driving the use of these systems is optimization of manpower needed to monitor these critical assets by using on-line systems.