Page 125 - Pipeline Rules of Thumb Handbook

112 Pipeline Rules of Thumb Handbook

Figure 2
Operational Life
To use Figure 1 for determining
operational life multiplier, F 1, select
expected operating life (less than 50
years) on the horizontal time line,
move upwards to intersect the
diagonal turn line and then left to
take reading at vertical axis.
Example: 5 year operational life will
yield F 1 = 1.094.

Figure 3
Environmental Service Factor F 3

Substance Service Factor (F 3 )
Crude Oil 0.50
Wet Natural Gas 0.50
Dry Natural Gas 0.64

Figure 4. Temperature Correction.

Example: A polyethylene pipe operat-
ing at 125°F would have an F 2 factor of
0.62