Published ICDA References

• GRI Report GRI-02/0057, Internal Corrosion Direct Assessment of Gas Transmission Pipelines--Methodology. 2002
• NACE Corrosion 2006 Technical Paper #06183: Improved Critical Angle Equation Broadening Direct Applicability Of ICDA For Normally Dry Natural Gas Pipelines -- LINK
• ICDA Calculator Spreadsheet (based on GRI-02/0057 model) – LINK
• Preparing GWUT Notifications in conjunction with an ICDA Program

DOT Regulatory Links

• US DOT Gas Transmission Integrity Management Regulation
• OPS Direct Assessment Workshop slides (Nov 2003)
• Gas Distribution Integrity Management Information

ICDA Frequently Asked Questions (FAQ)

• FAQ-105. If an operator has no records indicating that a pipeline section contained water or other electrolytes, is the lack of records sufficient to demonstrate that ICDA is unnecessary downstream of that location until the next feed injection point? [06/09/2004]
• FAQ-107. Section 192.927(c)(5)(iii) states that the ICDA plan must include "provisions that analysis be carried out on the entire pipeline in which covered segments are present..." Please clarify what sections of the pipeline must the operator conduct this analysis. Also, please define the term "analysis." Is this intended to be ICDA pre-assessment or some other analysis? [05/11/2004]
• FAQ-126. Can Internal Corrosion Direct Assessment (ICDA) be used on a dry-gas system that was used previously to transport wet gas? [09/03/2004]
• FAQ-127. Must I notify OPS (or the appropriate State) if I plan to use ICDA to assess a system transporting gas with an electrolyte nominally present in the gas stream? [04/08/2004]
• FAQ-158. Must historical operating conditions be considered, or only current operating conditions, when using ICDA? [12/06/2004]
• FAQ-193. Currently, no standard exists for ICDA. How can we include ICDA in our plan when there is no accepted standard? [08/19/2004]
• FAQ-235. If Guided Wave UT is used as part of the ICDA process, is it considered "other technology" requiring notification to OPS/states? [11/04/2005]
• FAQ-132. How do I determine a new reassessment schedule if I identify defects requiring remediation using ICDA during a CDA assessment? [12/06/2004]
• FAQ-153. Must I notify OPS/state regulators if I plan to use a different model for ICDA than the one referenced in the rule? [09/03/2004]