Page 302 - Pipeline Risk Management Manual Ideas, Techniques, and Resources

Modeling ideas Ill 13/279
10.0 pts [Low Ductility]-Material is <IO ft-lb pibration Monitorin+ Monitoring of in-service equip-
5.0 pts [Unknown Ductility] mentimaterial’s frequency, duration, and level and location of
vibration stresses from various sources, including pumps,
[Material Cyclic Stress]- Evaluation of various in-service rotating equipment, wind, throttling valves, surges, tempera-
material’s frequency, duration, and level and location of cyclic ture changes, ground movements, traffic, etc.
stresses, including severe pump starts/stops, pressure cycles,
fill cycles, traffic loadings, etc. 0.0 pts mot Applicable]
2.0 pts [No Vibration Monitoring Needed]-Equipment‘mate-
0.0 pts [Not Applicable] rial is subjected to low or no vibration so does not require
2.0 pts [Low Cyclic Stress]-Material is subjected to low cycle monitoring
frequency (number of eventdtime), short cycle duration 4.0 pts [Continuous Vibration Monitoring w/Shutdown]-
(time), low cycle magnitude (condition change amount), Equipmentimaterial is monitored for vibration frequency,
and/or distant proximity from source (feet) vibration duration, and vibration magnitude and/or proxim-
4.0 pts [Moderate Cyclic Stress]-Material is subjected to mod- ity from vibration source, which shuts down equipment on
erate cycle frequency, moderate cycle duration, moderate vibration limit exceedence
cycle magnitude and/or moderate proximity from source 6.0 pts [Continuous Vibration Monitoring w/Alann-
10.0 pts [High Cyclic Stress]-Material is subjected to high Equipmentimaterial is monitored for vibration frequency,
cycle frequency, long cycle duration, high cycle magnitude, vibration duration, and vibration magnitude and/or proxim-
and/or proximity from source ity from vibration source which alarms locally/remotely on
5.0 pts [Unknown Cyclic Stress] vibration limit exceedence.
8.0 pts [Manual Vibration Monitoring]-Equipmentimaterial
[Material Vibration]- Evaluation of various in-service is monitored for vibration frequency, vibration duration, and
equipmenthaterial’s frequency, duration, level and location of vibration magnitude and/or proximity from vibration source
vibration stresses from various sources, including pumps, manually on a periodic basis (less than one time per year)
rotating equipment, wind, throttling valves, surges, tempera- 10.0 pts [No Vibration Monitoring]-Equipmentimaterial is
ture changes, ground movements, traffic, etc. not monitored for vibration
5.0 pts [Unknown Vibration Monitoring]
0.0 pts [NotApplicable]
2.0 pts [Low Vibration Stress]-Material is subjected to low [Safety Systems Exceedence Overstress Potentid- Evaluation
vibration frequency (# eventsitime), short vibration duration of the potential to exceed any level, pressure, temperature, or
(time), low vibration magnitude (condition change amount) flow safe operating limits based on maximum system operat-
andor distant proximity from vibration source (feet). ing conditions, equipment design limits, and safety system
4.0 pts [Moderate Vibration Stress]-Material is subjected to limitations
moderate vibration frequency, moderate vibration duration,
moderate vibration magnitude and/or moderate proximity 0.0 pts Po Exceedence Potential or Not Applicable]-
from vibration source. Maximum system operating conditions cannot exceed
10.0 pts [Highvibration Stress]-Material is subjected to high equipment design or safety system limits
vibration frequency, long vibration duration, high vibration 2.0 pts [Low Exceedence Potentiall-Maximum system oper-
magnitude and/or close proximity from vibration source. ating conditions occasionally exceed equipment safety
5.0 pts [UnknownVibration Stress] system limits but not design limits
4.0 pts [Moderate Exceedence Potentiall-Maximum system
[Pressure Test Stress]- Evaluation of pipe, vessel and com- operating conditions routinely exceed equipment safety sys-
ponent pressure test levels by comparing the minimum test tem limits but not design limits
pressure (MTP) and SMYS. Expressed as a percentage: (MTP / 10.0 pts [High Exceedence Potentiall-Maximum system
SMYS * 100%). operating conditions routinely exceed equipment design
limits and safety system limits
0.0 pts mot Applicable] 5.0 pts [Unknown Exceedence Potential]
2.0 pts [MTP >loo% SMYSI-High test pressure level
5.0 pts [MTP 80% to100Y0 SMYSI-Moderate test pressure [Safety Systems Actions]- Evaluation of the various actions
level that initiate, or are initiated by, station safety systems involving
10.0 pts [MTP 180% SMYSI-Low test pressure level changing level, flow, temperature, and pressure conditions.
5.0 pts [UnknownTest Stress]
0.0 pts [Not Applicable]
[Pressure Test Age]- Evaluation of pipe, vessel, and compo- 2.0 pts [Automatic EquipmentiStation Shutdown-
nent pressure test ages by recording the time since the last Condition-sensing device or permissive limit excee-
appropriate facility test. dences automatically initiate a full, or partial, shutdown of
affected station equipment, with an alarm to remote/local
0.0 pts mot Applicable] personnel
2.0 pts [< 5Yrs Old] 4.0 pts [Remote EquipmentiStation Shutdown-Condition-
10.0 pts [>5 Yrs Old] sensing device or permissive limit exceedences alarm at a
5.0 pts [UnknownTest] continuously manned location and requires operators to