Abstract
Emergencies and breaks of field pipelines result in both gas, oil, and refined products waste and high costs for maintenance and repair evaluated in billiard rubles annually. The purpose of this work is calculate test pressure in field pipelines with the account of pipes ovality and curvature, stress pattern, surface damage areas, plasticity of pipe steels and optimal parameters control. To determine maximum test pressure it is advisable to divide the pipeline into parts for hydraulic tests, denote sources of water feeding and points of water discharge. Minimum elastic bend radius (EBR) and walls thickness (WT) should be found for every part. Unfailing service can be provided by periodical hydraulic tests, e.g. once in three years (in case when the test pressure is σtp = σfp) or by periodic decrease of the operational pressure. The other way to provide unfailing service of the pipeline is decreasing cyclic load.
Published Version
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