1. Sam Gordji, samgordji@yahoo.com
Obtaining PD ,PFA , and Other Important Parameters For Pipeline Leak Detection System
Sam Gordji,
To obtain a copy of “Standard Test Procedures for Evaluation Leak Detection Methods: Pipeline Leak Detection Systems”, please visit: Or
Instructor’s guide is a part of this seminar and is called Semsas1.doc

2. Definitions
Noise: A random variable, fluctuation in measurement due to temperature, pressure, and other factors
Signal, a leak, e.g. .1 gph, .2 gph, etc.
Signal-plus-noise, when the signal is added to the noise
LR, leak rate
Threshold, a location between the zero leak rate and a specific leak rate, usually half way between the above two location

3. Noise Only Cumulative Frequency Distribution (CFD)

4. -.1 Is Added to Every Test Results This Is the CFD for a Leak Rate of -.1 gph

5. When the Noise Is Added to the Signal

6. Deleting the 2 Lower and One Higher Observations

7. For the Same Data Changing the LR to -.20 From -.1

8. Page A-6 of SIR Protocol

9. With Leaking Tank Out of the Picture We Have

10. Conclusion
When testing, it is real important to ensure that the instruments are working correctly and we have non-leaking pipelines
As seen from the data, larger variation in the measurements the “random noise” causes problem and decrease the PD and increase the PFA
Please your question to:
Thank you