6 - Planning the RBI Assessment Flashcards
Getting Started:
,,,,,determine the scope and the priorities for an RBI assessment
owner-user
Getting Started:
The organizing process of ,,,,,/, ,,,,,, and ,,,,,, improves the efficiency and effectiveness of conducting the RBI assessment and its end-results in managing risk.
aligning priorities
screening risks
identifying boundaries
Getting Started:
An RBI assessment is a team-based process that requires proper skills and knowledge from ,,,,,
multiple disciplines
Reduce Costs:
Reducing inspection costs is usually not the primary objective of an RBI assessment, but it is frequently a side effect of ,,,,,
optimization
Safety and Environmental Management Requirements:
RBI provides a ,,,,,, to guide a user in the sele ,,,,,,, ction of ,,,,,, to be included and the and extent of inspection activities to be conducted to meet performance objectives.
systematic method
equipment items
frequency, scope,
Facilities End of Life Strategies:
It is important to revisit the RBI assessment if the remaining plant life is ,,,,, after the remaining life strategy has been developed and implemented.
extended
Facilities End of Life Strategies:
The end of life case for plant operation is about gaining the ,,,,,,without undue personnel, environmental, or financial risk
maximum remaining economic benefit
from an asset
Facilities End of Life Strategies:
End of life strategies focus the inspection efforts directly on .,,,,,, areas where the inspections will provide a reduction of risk during the remaining life of the plant
high-risk area
Facilities End of Life Strategies:
Inspection activities that do not impact risk during the remaining life are usually ,,,, or ,,,,,
eliminated or reduced
Initial Screening :
The screening process focuses the analysis on the most important group of equipment items so that ,,,,and ,,,, are more effectively utilized.
time
sources
Establish Physical Boundaries of an RBI Assessment:
Typically, RBI is done on ,,,, of equipment (e.g. an entire process unit) rather than on a single component.
multiple pieces
Facilities Screening:
Screening at the facility level may be done by a ,,,,, RBI assessment
simplified qualitative
Facilities Screening:
Examples of key questions to answer at the facility level are listed as;
1- Facility located in a regulatory jurisdiction that will
accept modifications to statutory inspection ??
2- management of the facility willing to invest in the
resources ??
3- Facility have sufficient resources and expertise
available to conduct the RBI assessment
Process Units Screening :
If the scope of the RBI assessment is a multi-unit facility, the first step in the application of RBI is screening of entire process units to ,,,,,, risk
rank relative
Process Units Screening :
for a process unit , key questions to answer at the process unit level are;
1- process unit have a significant impact on the operation of the facility ???
2- significant risks involved in the operation of the process unit ???
Systems Within Process Unit Screening:
It is often advantageous to group equipment within a process unit into systems, loops, or circuits where common ,,,,, exist based on process chemistry pressure and temperature, metallurgy, equipment design, and operating history.
environmental operating conditions
Systems Within Process Unit Screening:
In case the risks of each piece of equipment in the system show a common sensitivity to changes in process conditions, then a screening can establish ,,,,, with common variables and ranges for the entire system.
one single IOW
Systems Within Process Unit Screening:
,,,, or ,,,,, diagrams for the unit may be used to identify the systems including information about metallurgy, process conditions, credible damage mechanisms, and historical problems.28 API RECOMMENDED PRACTICE 580
Block flow or process flow
Systems Within Process Unit Screening:
When a process unit is identified for an RBI assessment and overall optimization is the goal, it is usually best to include ,,,,, within the unit
all systems
Equipment Item Screening:
In most plants, a large percentage of the total unit risk will be concentrated in a ,,,,, of the equipment items
relatively small percentage
Utilities, Emergency and Off-plot Systems:
When emergency systems (e.g. flare systems, emergency shutdown systems) are included in the RBI assessment, their service conditions during both ,,,, and ,,,, should be considered
routine operations
upset
Establish Operating Boundaries :
The purpose of establishing operational boundaries is to identify ,,,,,,that may impact deterioration
key process parameters
Establish Operating Boundaries :
The RBI assessment normally includes review of both
,,,,, and ,,,, for normal operating conditions.
POF and COF
Establish Operating Boundaries :
The operating conditions, including any ,,,,,analysis, used for the RBI assessment should be recorded as the operating limits for the assessment.
sensitivity
Establish Operating Boundaries :
It is vital to establish and monitor key process parameters that may affect equipment integrity to determine whether ,,,,,
operations are maintained within boundaries (i.e. IOWs).
Start-up and Shutdown :
,,,,, during start-up and shutdown can have a significant effect on the risk of a plant especially when they are more severe (likely to cause accelerated deterioration) than normal conditions, and as such should be considered for all equipment covered by the RBI assessment
Process conditions
Start-up and Shutdown :
In case of ,,,,, corrosion ) , process condition during start-up and shutdown can have a significant effect on the risk of a plant
polythionic acid stress corrosion cracking (PASCC)
Start-up and Shutdown :
,,,, lines are often included within the process piping and their service conditions during start-up and ,,,, should be considered.
Start-up
subsequent operation
Normal, Upset, and Cyclic Operation:
The normal operating conditions may be most easily provided if there is a ,,,, or ,,,,, available for the plant or process unit
process flow model
mass balance
Normal, Upset, and Cyclic Operation:
Normal operating conditions found on documentation should be verified by ,,,,, personnel
unit operations
Normal, Upset, and Cyclic Operation:
The RBI assessment on systems with cyclic operation, such as ,,, systems, should consider the complete cyclic range of conditions
reactor regeneration
Normal, Upset, and Cyclic Operation:
Examples of equipment under cyclic or intermittent conditions at higher temp are;
- pressure swing absorption vessels,
- catalytic reforming unit regeneration piping systems,
- deaerator vessels, and
- insulated equipment
Operating Time Period
The,,,,,,,of the selected process units/equipment is an important limit to consider. The RBI assessment may include the entire operational life, or may be for a selected period.
unit run lengths
Selecting a Type of RBI Assessment:
processing units that are expected to have,,,,,, risk may only require simple, fairly conservative methods to adequately accomplish the RBI objectives
lower
