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ROTATING EQUIPMENT SERVICES

CUI (Corrosion Under Insulation) Videos CUI Program Video
Click here to view our Corrosion Under Insulation (CUI) Program video
Predicitive Maintenace (PdM) and Proactive Maintenace (ProAM) technologies are utilized on the following assets:

Rotating Equipment
  • Motors
  • Pumps
  • Compresors
  • Gearboxes
  • Turbines
  • Fans
Electrical Equipment
  • Transformers
  • Motor Control Centers
  • Switch Gear
Fixed Equipment
  • Steam Traps
  • Compressed Air lines
A variety of potential damage mechanisms need to be considered when applying PdM/ProAM technologies such as:
  • Bearing Damage
  • Gear Damage
  • Coupling type and condition
  • Lubrication - Lack of and Contamination
  • Alignment of coupled shafts
  • Balance or rotors
  • Leaks
  • Electrical Discharge
Advanced techniques used to detect the various issues listed above are:

Vibration Analysis
Vibration Analysis technology can be applied to all rotating equipment on site. Utilizing this technology can provide the site with immediate insight into the health of the rotating components. It can be used to isolate the location of damage to rotating components, as well as help determine the severity of damage. All of the potential damage mechanisms listed above and more can be identified, trended and potentially eliminated by effectively implemented PdM programs using vibration analysis. Vibration is applied to equipment in service so there is no impact to production. MISTRAS Services can also provide this technology in hazardous environments by the use of Intrinsically Safe (IS) equipment.
Oil Analysis
Lube oil is critical to the health of any rotating piece of equipment. Understanding the condition of the lubrication (oil/grease) in rotating equipment allows operations and maintenance to effectively plan lubrication PMs. Due to sample size equipment, isolation and shut down are not required. MISTRAS uses independent lab analysis and correlates the data with other PdM technologies in a unified database. Applying multiple technologies provides our customers the confidence with secondary and tertiary confirmation.
Airborne Ultrasonics (aUT)
Airborne Ultrasonics is used in several applications to monitor bearings, electrical discharge, air leaks and effective management of lube oil programs. Some assets are inaccessible to vibration probes, however airborne ultrasonics can be applied effectively. Airborne Ultrasonics, used in combination with Thermography scans, has provided additional accuracy and safety to electrical system inspections. PdM programs have saved hundreds of thousands of dollars annually by using UT to find steam and compressed air leaks.
Infrared Inspection (IR)
Thermography, initially considered an electrical inspection technique, can be applied to rotating and fixed assets as well. Used in electrical inspection, it can identify differences in temperatures of connections, fuses, transformers, switchgear, etc. Combining IR and AU is essential to any comprehensive PdM program, and applying AU provides additional levels of safety during electrical inspections. Electrical discharge, also known as carona, can only be detected using AU, and the effects of carona can be found with visual and IR inspection.
Motor Current Signature Analysis (MCSA)
Our periodic MCSA program detects motor faults such as broken/cracked bars, as well as problems with the high resistance joints on any AC induction motor. Our advanced approach helps to identify the probability and severity of these faults, while trending values to allow ample time for scheduling repairs.
Acoustic Emission (AE)
Acoustic Emission is the term used when defects in metals, plastics and other materials rapidly release energy when subjected to mechanical loading. The energy propagates in the form of high frequency stress waves and these types of oscillations are picked up by Acoustic Emission sensors on the surface of the specimen and converted to electrical signals, so-called bursts. The Acoustic Emission analysis is the characterization of the bursts according to intensity and frequency content. Analyzing bursts from several sensors at well placed positions on the asset allows for determination of the location of the Acoustic Emission source(s) on the asset.

Laser Aligment
Precision laser alignment of coupled machinery is critical to maximizing the performance and availability of machine trains. Misaligned machines are more likely to experience seal and bearing failures and can result in reduced product quality and ultimately production shutdowns. Misalignment is most frequently detected during routine vibration data collection.
Dynamic Rotor Balance
Dynamic balancing extends your equipment's life by eliminating vibration that destroys mechanical components. MISTRAS can balance rotors in their own bearings on site, utilizing portable equipment. Precision On-site balancing drastically reduces downtime and repair costs, while increasing your productivity. Our staff brings extensive balancing experience to your plant for virtually every type, shape and size of rotor.
Heroes Wanted: At MISTRAS, we protect critical assets. Sound familiar? Current openings include: Technicians, Engineers, Programmers, Inspectors. Make our mission your next. Read more...
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