ABSTRACT
One of the key methods used in determining the integrity of an existing pipeline is hydrotesting. Prior to commencing hydrotest procedures, research data such as original resurvey plats, pipeline reports, failure reports, and topographic maps are compiled to profile the pipelines characteristics. Based on this information, a practical test pressure for an unregulated pipeline can be determined by using ASME B31.8,"Gas Transmission and Distribution Piping Systems". During hydrotesting, failures resulting from metal corrosion must be anticipated so that appropriate safety and repair preparations can be undertaken. Repair of failures requires a systematic approach including the calculation of the length of piping to be replaced, development of a process by which test water from one section may be transported to another without undue delay in operations, and development of a cost effective means of test water disposal. Although hydrotest has been proven to be an accurate and dependable gauge of line integrity, the process is not yet fully defined and improvisation is still necessary to optimize both efficiency and accuracy of results.
