RCM Guide E-July14

8/11/2019 RCM Guide E-July14

1/103


2/103


3/103


4/103


5/103


6/103


7/103


8/103


9/103


10/103


11/103


12/103


13/103


14/103


15/103


16/103


17/103


18/103


19/103


20/103


21/103


22/103


23/103


24/103


25/103


26/103


27/103


28/103


29/103


30/103


31/103


32/103


33/103


34/103


35/103


36/103


37/103


38/103


39/103


40/103


41/103


42/103


43/103


44/103


45/103


46/103


47/103


48/103


49/103


50/103


51/103


52/103


53/103


54/103


55/103


56/103


57/103


58/103


59/103


60/103


61/103


62/103


63/103


64/103


65/103


66/103


67/103


68/103


69/103


70/103


71/103


72/103


73/103


74/103


75/103


76/103


77/103


78/103


79/103


80/103


81/103


82/103


83/103


84/103


85/103


86/103


87/103


88/103


89/103


90/103


91/103


92/103


93/103


94/103


95/103


96/103


97/103


98/103


99/103


100/103

Appendix 4 Overview of Condition Monitoring Techniques and Potential-Failure Interval Data

90 ABS GUIDE FOR SURVEY BASED ON RELIABILITY-CENTERED MAINTENANCE . 2003

TABLE 5 (continued)Nondestructive Testing

Condition Condition MonitoringSubcategory

Technique Fixed/Portable Equipment

P-F Interval

Skill

Surface andshallowsubsurfacedefectsTube thicknessWearStrainCorrosionMetalthickness lossdue to wearand/or

corrosion

Eddy CurrentTesting Eddy Current Testing Portable Weeks

Trained andexperienced technician

PlasticdeformationCrackformationFatigueStressWear

Acoustic Emission Acoustic Emission Portable Weeks Trained andexperienced technician

Defects in pressure boundary

Hydrostatic Testing Hydrostatic Testing Portable Days Trained skilled worker

Surface cracks

Oxide filmsCorrosionWearFatigueWeld defects

Visual Inspection -Borescope/Endoscope/Fiberscope

Visual Inspection -Borescope/Endoscope/Fiberscope

Portable Weeks Trained andexperienced technician


101/103


102/103


92 ABS GUIDE FOR SURVEY BASED ON RELIABILITY-CENTERED MAINTENANCE . 2003

TABLE 6 (continued)Electrical Condition Monitoring 1



P-F Interval Skill

Broken rotor barsBroken shortingringsHigh resistance

between barsand ringsUneven rotor-stator gapRotormispositionRotor

deteriorationRotor shorted

Motor CircuitAnalysis Motor Circuit Analysis Portable

Weeks tomonths

Experienced electricaltechnician to performthe test

Battery celldeterioration

BatteryImpedanceTesting

Battery Impedance Testing Portable WeeksExperienced electricaltechnician to performthe test

Notes:1 Refer to Appendix 4, Table 2 Thermography for additional condition-monitoring techniques related to electrical

equipment.

2 This test stresses the insulation systems and can induce premature failure in marginal motors. This test is notrecommended as a routinely repeated condition-monitoring technique, but as an acceptance test.

TABLE 7Performance Monitoring



P-F Interval Skill

Heat transferdeterioration Temperature

Monitoring Temperature Monitoring Fixed/PortableDays toweeks

Trained semi-skilledworkerPerformance

deterioration

Performance

deteriorationFlow Monitoring Flow Monitoring Fixed/Portable Days to

weeks

Trained semi-skilled

workerPerformancedeterioration Pressure

monitoring Pressure monitoring Fixed/PortableDays toweeks

Trained semi-skilledworkerLeaks

Plugging

Power output Power output Power meter (torque meter) Fixed/Portable Days toweeks Trained skilled worker


103/103


TABLE 8Suggested P-F Intervals

Equipment Item

Controls Test Interval

Failure per 10 4 hrs Months

Main Engine 0.5570 4.3Boiler 0.0137 175.2

Diesel Generator 0.0920 26.1

Steam Turbo Generator 0.0020 1200.0

Documents

RCM Guide E-July14