1. ICDA of Gas Transmission, Gathering & Storage Systems GOAL: Develop a protocol for Validation of dry gas ICDA method: –Identify data needs –Develop procedures for validation –Develop evaluation criteria TASK: –Identify sources of field data for validation –Validate ICDA method for dry gas –Demonstrate the method using an example

2. Dry Gas ICDA Approach Utilizing a fluid flow model, the critical angle for water accumulation is determined as a function of gas velocity. The actual angle of inclination of pipe with respect to gas flow direction is determined through digital elevation maps and pipe burial depths

3. Example 1

4. ICDA Process corrosion No corrosion 0 -2 123 -3-4 Region First highest angle Gas flow corrosion

5. Example 1 ICDA Score Card A historical IC leak was predicted by ICDA.

6. ICDA Methodology for Wet Gas ICDA Goal GOAL: Develop a method for wet gas ICDA to: –Identify locations most likely to have maximum internal corrosion –Transmission, gathering & storage pipelines –Focus on HCA rule Status: –Consensus developed on overall methodology –Detailed flow modeling using FLUENT indicates applicability of a critical angle –Work ongoing to develop probability distributions for corrosion severity with distance –Need ILI (or other integrity) data

7. Improvements to ECDA Assessment Methodology by Incorporating Soils Data GOAL: Obtain field data for soils to develop a soils model for existing external corrosion direct assessment (ECDA) datasets and methodology –Identify corrosion/soils model protocol Task: –Establish dataset of existing field inspection sites with indirect soils inspection data –Collect soils-related data from on-going ECDA effort –modify existing soils model, which was developed for stress- corrosion cracking assessments, for ECDA. –Effort will be conducted concurrently with an ECDA demonstration project funded by GTI/PRCI.

8. Improvements to ECDA Assessment Methodology by Incorporating Soils Data Status: –Completed collecting soils data from existing operator dataset –On-going effort to collect soils-related data from parallel R&D effort with GTI/PRCI –Soils model modification currently under development

9. Develop high-amplitude guided wave for long range pipeline inspection GOAL: Develop a method for rapid screening in long lengths of pipe for corrosion & other defects –Need high-power, guided-wave inspection technology in buried applications with bituman coating –Target goal is an increase by 20 fold of amplitude Task: –Investigate multiple sensor/strip pairs & sensor optimization –Evaluate alternate strip materials –Modify existing system and validate performance –Conduct field demonstrations