...Abstract Based on Federal laws, pipeline operators in USA were required to develop a proactive Pipeline Integrity Management Plan to manage risk and protect public areas near pipelines. NACE initially published RP0502-02 for ECDA (External Corrosion Direct Assessment), and standard practices...

.... Data Analysis and integration ILI Pipeline Integrity Internal Corrosion External Corrosion Stress Corrosion Cracking Inline Inspection DA ECDA ICDA SCCDA INTRODUCTION On January 25, 2015, the National Transportation Safety Board (NTSB) performed a study to evaluate the need for improvements...

... of the technology are presented to demonstrate the effectiveness of LSM for pipeline integrity investigations. Pipeline Integrity Direct Examination Direct Assessment Buckle SCCDA ECDA Digs LSM Inline inspection Stress Concentration Geometric Anomalies Hoop Stress Ground / Slope Movement Cracks Casing...

... be assessed by several methods including 5-M Methodology, inline inspection (ILI), hydrostatic testing, external corrosion direct assessment (ECDA) and stress-corrosion cracking direct assessment (SCCDA). To carry out ILI analysis proper launching and receiving of pigs should be available in the pipeline net...

... inspection method are addressed by another, using an integrated coating anomaly detection approach has become integral to the success of any ECDA program. For instance, at rectifier remote locations, where there is an insufficient DC current to successfully conduct DCVG, the AC transmitter can be relocated...

...Abstract Recent advances in External Corrosion Direct Assessment (ECDA) methodologies have restored confidence in pipeline operators who rely on this approach to assess the integrity of their pipeline assets. This is partially because of improvements in ECDA technologies to integrate multiple...

... Corrosion Direct Assessments, and remedial program decisions. Guidance for identifying when these issues may be relevant and methods for detecting and compensating for these issues will be provided. close-interval potential survey CIPS CIS ECDA equalization current IR free measurement error metallic...

... the complex geometry of the different pipeline sections (pigable and unpigable); Hazard Identification studies (HAZID), Internal Corrosion Direct Assessment (ICDA) and External Corrosion Direct Assessment (ECDA) have been modified for both offshore and onshore unpigable sections. ICDA methodology has been...

... for properly interpreting survey results in a station are given. external corrosion direct assessment ECDA CIPS DCVG congested piping unpiggable facility station INTRODUCTION Effective assessment of facility piping has lagged behind assessments of cross-country pipelines. The reasons...

... the effectiveness of combined CIPS and DCVG surveys for improved data correlation. close interval surveys CIS close interval potential surveys CIPS direct current voltage gradient DCVG combined CIPS and DCVG surveys CIPS DCVG spatial error external corrosion direct assessment ECDA stray current telluric...

... of ECDA regions would result in unwarranted digs, should indications prioritized as “Scheduled Action Required” be found along various regions. However, artificially reducing the number of ECDA regions may eventually result in an even worse situation. Paragraph 5.6.2 of SP0502-2010 states...

... exposure to corrosion activity. Easy to implement, the presented method is an additional tool to assist pipeline operators with assessing the condition of their pipelines and prioritizing corrective actions. fuzzy logic pipeline integrity soil corrosivity cathodic protection DCVG ECDA INTRODUCTION...

...The quality of the indirect inspection data is a critical factor in conducting a successful ECDA process. False indications can result in high cost excavations at the wrong locations, while missed severe indications could result in an immediate threat to pipeline integrity. This paper covers three...

...Abstract External Corrosion Direct Assessment (ECDA) is a valuable inspection technique for assessing the integrity of underground pipelines. In addition to limiting ECDA application to situations where external corrosion is the principal threat, normal practice is to further restrict ECDA use...

...INTRODUCTION Pipeline External Corrosion Direct Assessment (ECDA) is a process for buried onshore ferrous piping systems to improve pipeline safety. This process requires the integration of data from multiple sources including knowledge of pipeline construction, operating practices, environmental...

...Abstract Two leaks were found on a recently installed (1999) pipeline which was coated with extruded polyethylene and protected with directly connected magnesium anodes. This paper describes the use of external corrosion direct assessment (ECDA) principles to identify locations where corrosion...

... at that location. During the PCM survey, current flow could not be detected in the secondary location. It is suspected that another structure in the area interfered with both surveys; however, the secondary site was not excavated, so cause of these phenomena could not be determined. Because no formal ECDA program...

... defect voltage gradient AC voltage gradient DC voltage gradient ACVG DCVG ECDA Indirect Inspection INTRODUCTION There are numerous above ground survey techniques available to assess the potential for external corrosion or to locate holidays or anomalies in protective coatings on buried utilities...

... such as cased segments and station piping have posed significant challenges to operators relying on External Corrosion Direct Assessment (ECDA) and Internal Corrosion Direct Assessment (ICDA) as integrity assessment methods. Terminal, compressor, fabricated gate and generating stations pose some significant...

... for imminent or short term failure are prioritized under Phase 1 and Phase 2 responses respectively. Anomalies that could grow to become a severe risk for pipeline integrity prior to the next ILI are prioritized as Phase 3 excavations. This paper describes the use of External Corrosion Direct Assessment (ECDA...