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11088 Analyses of Black Powder in Natural Gas Pipeline

Picture for 11088 Analyses of Black Powder in Natural Gas Pipeline
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Product Number: 51300-11088-SG
ISBN: 11088 2011 CP
Author: Junya Yamada, Katsuyoshi Nakayama and Hidenori Kaneta
Publication Date: 2011
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Our company has a natural gas pipeline network which has been active since 1959 and currently has a total length of reaching 1,400km. The analysis of particle diameter distribution and chemical composition of black powder captured in the gas filters at the gas supply points give valuable information related to pipeline operation management. This paper contains information obtained from X-ray Fluorescence (XRF), X-ray Diffraction (XRD), Thermo Gravimeter & Differential Thermal analysis (TG-DTA) and Fourier Transform Infrared Spectrometry (FT/IR) analyses of collected black powder from our pipelines.

The results showed that Fe3O4 is the main compound of black powder and is originated from a process of dissolved oxygen corrosion due to the presence of very small amounts of oxygen and water in the pipeline. The presence of oxygen and water in the pipeline could be due to the exposure of the pipeline to the atmosphere during pipeline construction or other major repairs. As the next step, historical operational data and information about pipeline construction should be systematically collected and integrated in a useful way to predict the formation of black powder and improve pipeline maintenance.

Key words: black powder, sales gas, internal corrosion, chemical properties, pipeline maintenance
Our company has a natural gas pipeline network which has been active since 1959 and currently has a total length of reaching 1,400km. The analysis of particle diameter distribution and chemical composition of black powder captured in the gas filters at the gas supply points give valuable information related to pipeline operation management. This paper contains information obtained from X-ray Fluorescence (XRF), X-ray Diffraction (XRD), Thermo Gravimeter & Differential Thermal analysis (TG-DTA) and Fourier Transform Infrared Spectrometry (FT/IR) analyses of collected black powder from our pipelines.

The results showed that Fe3O4 is the main compound of black powder and is originated from a process of dissolved oxygen corrosion due to the presence of very small amounts of oxygen and water in the pipeline. The presence of oxygen and water in the pipeline could be due to the exposure of the pipeline to the atmosphere during pipeline construction or other major repairs. As the next step, historical operational data and information about pipeline construction should be systematically collected and integrated in a useful way to predict the formation of black powder and improve pipeline maintenance.

Key words: black powder, sales gas, internal corrosion, chemical properties, pipeline maintenance
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