coke drum applications claudio allevato
TRANSCRIPT
Stress Engineering Services - CONFIDENTIAL 1
Coke Drum Strain Gage Installation
and Data Processing
Stress Engineering Services
Examples
Over View of System Data Processing Procedures
Stress Results
Richard Boswell
Stress Engineering Services - CONFIDENTIAL 2
4 Health Monitoring Systems h Short and Long Term Strain
Monitoring of Coke Drum Response to Daily Operation
h Cause and Effect of Operation on Drum Damage
h Integration into local DCS 4 Defect Identification and
Assessment h Acoustic Emission Testing h Inspection Planning &
Coordination 4 Crack Growth Prediction
h Fracture Mechanics and Probabilistic Crack Growth evaluations using actual operating data
h Low Cycle Fatigue Damage Accumulation
4 Bulge Analysis h Severity of bulges and
growth rate
SES Engineering Services to Owners, Operators, and Designers of Delayed Coke Drums…..
4 Drum Design and Modeling Using Actual Operating Transients h Skirt h Shell h Piping and Nozzles
4 Life Assessment and Extension Recommendations
4 Metallurgical Consulting and Testing h Weld Repair Procedures h Creep Analysis and Omega
Testing 4 Heater Condition and Life
Assessment 4 Root Cause Failure Analysis 4 Forensic and Litigation
Support
Stress Engineering Services - CONFIDENTIAL 3
Stress Engineering Services Coke Drum Applications
• Low Cycle Fatigue : What to expect
• EHMS: Equipment Health Monitoring System
• SES DrumBeat Analysis Examples
• Other Design Analysis and Measurement Application Examples
Stress Engineering Services - CONFIDENTIAL 6
Coke Drums Fail by Low Cycle Fatigue and not by Age Alone
Stress Engineering Services, Inc. 15
Coke Drum Remaining Life
• Sections of two drums were replaced and operated safely until replacement in 1 year
• Two drums were routinely inspected and repaired on two week schedule in final 3 months
Stress Engineering Services - CONFIDENTIAL 25
High Temperature Strain Gage is a Platinum Tungsten Sensor rated for 1100 F
Stress Engineering Services - CONFIDENTIAL 29
SES DrumBeat Strain and Stress Calculations Hoop HTSG
ΔR ΔV Recorded Microstrain
TC Apparent Microstrain
Corrected Hoop Microstrain
Axial HTSG
ΔR ΔV Recorded Microstrain
Corrected Axial Microstrain
Hoop Stress
Axial Stress
Delta Stress
Histogram
Fatigue Damage
Crack Propagation Analysis
Stress Range per Cycle