Formalizes the process of internal corrosion direct assessment (ICDA) for pipelines carrying normally dry natural gas that can be used to help ensure pipeline integrity. The basis of DG-ICDA is a detailed examination of locations along a pipeline where water would first accumulate to provide information about the downstream condition of the pipeline. If the locations along a length of pipe most likely to accumulate water have not corroded, other downstream locations less likely to accumulate water may be considered free from corrosion. PRINTED HARD COPIES REQUIRE A MINIMUM OF 7-10 DAYS FOR PROCESSING BEFORE SHIPPING.
NEW IN 2010! This standard practice covers the NACE external corrosion confirmatory direct assessment (ECCDA) process for buried onshore ferrous piping systems. ECCDA is a continuous improvement process that was developed to improve pipeline safety, and it has the advantage and benefit of locating areas where corrosion is likely to occur in the future, not just areas where corrosion has already occurred. ECCDA can be used to validate previous assessment conclusions or determine if reassessment intervals are still appropriate, and the ECCDA process may detect additional pipeline integrity threats such as mechanical damage, stress corrosion cracking, and microbiologically influenced corrosion. This standard covers the four components of ECCDA: Preassessment, Indirect Inspection, Direct Examination, and Postassessment. PRINTED HARD COPIES REQUIRE A MINIMUM OF 7-10 DAYS FOR PROCESSING BEFORE SHIPPING.