. "Appendix D: Repair and Replacement Activities in Selected Industries." Interim Report of the Committee on Changes in New Source Review Programs for Stationary Sources of Air Pollutants. Washington, DC: The National Academies Press, 2005.
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Interim Report of the Committee on Changes in New Source Review Programs for Stationary Sources of Air Pollutants
TABLE D-2 Petroleum Refinery Industry: Projected Repair and Replacement Frequencies and Relative Costs
Activity
Unit
Estimated Frequency (years)
Replacement Cost (% per Unit)
1
3-5
>5
<5
5
5-10
10-20
<20
Pumps
Replace pump seals
All
x
x
x
x
x
Repair pumps
All
x
x
Replace pumps
All
x
x
x
x
Valves
Replace valve packing
All
x
x
x
x
x
Replace valves
All
x
x
Catalysts
Regenerate catalysts
Reformer
x
x
Replace catalysts
Hydrotreaters
x
x
Replace catalysts
Sulfur recovery unit (SRU)
x
x
Replace catalysts
not specific
x
x
x
x
x
Columns Reactors
Repair or replace trays and hardware
All
x
x
Repair or replace reactor internals
All
x
x
Replace weld overlays inside of columns, vessels, and reactors
