Page 19 - Pipeline Risk Management Manual Ideas, Techniques, and Resources

xvi Risk assessment at a glance

Relative Risk Rating = (Index Sum) f (Leak Impact Factor)
Index Sum = [(Third Party)
+(Corrosion)
+(Design)
+(Incorrect Operations)]

Third-party Index
A. Minimum Depth of Cover. ................. 0-20 pts 20%
B. Activity Level. ........................... 0-20 pts 20%
C. Aboveground Facilities .................... 0-10 pts 10%
D. LineLocating .......................... 0-15 pts 15%
E. Public Education .......................... 0-1 5 pts 15%
F. Right-of-way Condition. ................... 0-5 pts 5 yo
G. Patrol.. ................................. . O-15 pts 15%
0-100 pts 100%

Corrosion Index
A. Atmospheric Corrosion. ... 10%
Al. Atmospheric Exposure
A2. AtmosphericType ..................... 0-2 pts
A3. Atmospheric Coating. ................. 0-3 pts
B. Internal Corrosion. .... . . 0-20 pts 20%
B1. Product Corrosivity ................... 0-10 pts
B2. Internal Protection. ................... 0-10 pts
C. Subsurface Corrosion. .................... .&70 pts 70%
C 1. Subsurface Environment .............. .0-20 pts
Mechanical Corrosion. ................. 0-5 pts
C2. Cathodic Protection. ................... 0-8 pts
Effectiveness. ... ... 0-15 pts
Interference Potential. ................ 0-10 pts
C3. Coating.. ............................ 0-10 pts
Fitness ........... 0-10 pts
Condition. ........................... 0-1 5 pts

Design Index
A. Safety Factor. ............... . .O-35 pts 35%
.......................... 0-15 pts 15%
C. Surge Potential. .......................... .O-10 pts 10%
D. Integrity Verifications .... .0-25 pts 25%
E. Land Movements. ........................ ,615 pts 15%
0-100 pts 100%

Incorrect Operations Index
A. Design
Al. Hazard Identification .......... . . Wpts
A2. MAOP Potential ............. . 0-12 pts
A3. Safety Systems. ... . 0-10pts
A4. Material Selection. .................... 0-2 pts
A5. Checks.. ............................. 0-2 pts
0-30 pts 30%