Methods help remove black powder from gas pipelines

Abstract

Effective removal of black powder from a gas transmission system often requires a combination of methods. Removing such particulates is a multistep process requiring a comprehensive understanding of the nature of the problem. Different tools may be effective in some instances but not in others. This article examines Greek Public Gas Corp. SA’s (DEPA’s) experience in fighting black powder in its system, focused on its determining which technique provided the most efficient and cost-effective method of powder removal. Included in this examination are the different sorts of pigs, filters, and separators DEPA used in attempting to address the problem, with the effectiveness and shortcomings of each assessed. Background Black powder is a solid contaminant found in natural gas transmission and distribution systems throughout the world. Chemical or biological reactions with steel found in natural gas pipelines, gas wells, and associated facilities can create black powder.1 Solids may be simple or complex mixtures of small particles dispersed in gas (particulates) or they may be dispersed in water or liquid hydrocarbons (slurry).