... 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...

...Abstract The interpretation of indirect inspection data and selection of direct examination locations are crucial steps in conducting a successful external corrosion direct assessment (ECDA) process. This paper presents advances in the interpretation of indirect inspection data and selection...

...Abstract In recent years, effective techniques have been developed for conducting integrity assessments along cross-country pipelines. In order to provide similar confidence in facility integrity, it was proposed to apply a modified external corrosion direct assessment process to a small station...

...External Corrosion Direct Assessment DC voltage gradient close interval survey cathodic protection coating anomaly data interpretation severity classification INTRODUCTION Prior to 2002, pipeline inspections largely consisted of Hydrostatic Testing (HT) and In-Line Inspection (ILI...

... 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...

...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...

... 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...

... third party damage which remains the most significant threat to pipeline integrity. corrosion rate casings cased pipeline segments annular space direct assessment high consequence areas natural gas transmission pipeline external corrosion direct assessment ECDA electrical resistance (ER...

... 50 gas pipelines in Ontario, are presented and rationalized. Possible error scenarios resulting from neglecting the interaction between various types of indications are developed from existing sets of data. External corrosion direct assessment ECDA close-interval potential survey CIPS close...

... the on-site interventions. Simulation software cathodic protection pipeline network ECDA external corrosion direct assessment TRU transformer rectifier unit IK pipeline potential INTRODUCTION The model takes into account the combined effect of electrical (pipe, anode), electrochemical (soil...

... operating conditions, the corrosion rate is adapted. Most of the data required in this process are the data required in the pre-assessment step of the NACE External Corrosion Direct Assessment (ECDA) and NACE Stress-Corrosion Cracking Direct Assessment (SCCDA) standards. Monitoring: Using the above...

...Abstract Pipeline Hazardous Material Safety Administration (PHMSA) regulators require that pipelines with external coatings for which the threat of weather related conditions such as lightning can be assessed by External Corrosion Direct Assessment (ECDA), In Line Inspection (ILI), hydrostatic...

...Abstract Gasunie applies the External Corrosion Direct Assessment (ECDA) methodology to ensure the integrity of its non-piggable pipelines. To have a structured methodology available, a Pipeline Integrity Management System (PIMS) is in operation. For the non-piggable pipelines an ECDA management...

... survey. Close-interval potential survey close-interval survey CIPS CIS external corrosion direct assessment stress corrosion cracking direct assessment ECDA SCCDA SCC indirect inspection potential survey cathodic protection survey CP INTRODUCTION Materials Performance Feb, 1998 contains...

... Shorts to other structures Effectiveness of electrical isolation ○ Isolating fittings ○ Casings Localized corrosion Abstract When assessing pipeline integrity by External Corrosion Direct Assessment or Stress Corrosion Cracking Direct Assessment, close interval potential surveys...

... potential profile data based on practical experience using ECDA methodology under various pipeline conditions. External Corrosion Direct Assessment close interval survey indirect survey ON and OFF potentials cathodic protection corrosion data interpretation severity classification INTRODUCTION...

.... Abstract Integrity assessment of three pipelines in the gas transmission network (Brooks #1, Brooks #2 and Germantown to Woodstock), using the External Corrosion Direct Assessment (ECDA) methodology in accordance with the NACE Recommended Practice RP0502. This paper discusses the experiences...

... for the application of integrity management, such as survey selection, preparation, locating and distance measurement, data integration, and data validation. Close-interval potential survey close-interval survey CIPS CIS external corrosion direct assessment stress corrosion cracking direct assessment ECDA...

... analysis. It is possible to determine the condition of the pipeline and to know where to dig using the principles of the NACE RP 0502-2002 External Corrosion Direct Assessment (ECDA) and ASME B31.8S. External corrosion direct assessment Pipeline Integrity Management Rule ASME B31.8 S, direct examination...

...External Corrosion Direct Assessment ECDA corrosion close interval surveys CIS close interval potential surveys CIPS Direct Current Voltage Gradient DCVG soil resistivity AC Current Attenuation surveys ACCA coatings direct assessment in-line inspections ILI pipeline integrity...