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Table 4: Significant Variables in the Inherent Risk Models for Gas Transmission and Hazardous Liquid Pipelines

Table 4: Significant Variables in the Inherent Risk Models for Gas Transmission and Hazardous Liquid Pipelines

(negative sign indicates a negative correlation with risk)

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Gas transmission model Hazardous
liquid model
+
Total Miles
+ Total
Miles
+
Miles offshore
+ Miles from 26 to <28” diameter
+ Miles from 4 to <10” diameter + Miles
pre-1920
+ Miles from 20 to <28” diameter +
Offshore >20% SMYS
-
Miles from 0 to <4” diameter
+
Onshore <20% SMYS
- Miles installed 2000-2009 +
Regulated gathering lines
  + Total
barrel-miles
  + HVL barrel-miles
  - Miles from 8 to <10” diameter
  - Miles from 22 to <24” diameter
  - Miles from 24 to <26” diameter
  - Miles from 30 to <32” diameter
  -
Miles >36” diameter
  - Anhydrous ammonia barrel-miles

SOURCE: U.S. Department of Transportation, Research and
Innovative Technology Administration, Bureau of Transportation Statistics,
http://www.bts.gov.

Updated: Sunday, May 21, 2017