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Corrosivity Laboratory Investigations Of Streams Associated With Gas Compression Plants And Liquid Separation Stations

The design packages are being optimized for the construction of gas transmission lines associated with nine (9) Gas Compression Plants (GCPs) and six (6) Liquid Separation Stations (LSSs). The objective of this study was to assess the service corrosivity of all gas transmission lines associated with these GCPs and LSSs.  The results of the study will assist in selecting a cost-effective and efficient corrosion management program in terms of both materials and corrosion control options. To address this objective, the study involved conducting laboratory tests simulating the conditions in these lines.  Three types of corrosion attacks were investigated, namely, general corrosion, pitting corrosion, and gas phase corrosion.  

Product Number: 51322-17911-SG
Author: Yahya T. AlJanabi
Publication Date: 2022
Industry: Coatings
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The purpose of this laboratory study was to assess the corrosivity of fluids transported through a huge network of gas transmission lines associated with nine (9) Gas Compression Plants (GCPs) and six (6) Liquid Separation Stations (LSSs). The CO2 content ranges from 0.94 mol% to 3.9 mol%, while the H 2 S content varies from 0 to 1.9 mol%. The lines range in diameter from 20 to 36 inches.  The highest gas flow rate in these lines is 757 MMscfd, and the highest estimated temperature and pressure are 140°F (60°C) and 1050 psig (72 bar), respectively. The study consisted of three parts: 1) uniform corrosion in liquid and gas phases; 2) pitting corrosion in liquid and gas phases; and 3) gas phase corrosion. The absence of dissolved solids and bacteria eliminated the need to study for scaling and microbiolog icallyinfluencedcorrosion (MIC).  The study was conducted using a rotating cage assembly with low alloy carbon steel test coupons and distilled water with 0, 150, and 1000 mg/L chloride.

The purpose of this laboratory study was to assess the corrosivity of fluids transported through a huge network of gas transmission lines associated with nine (9) Gas Compression Plants (GCPs) and six (6) Liquid Separation Stations (LSSs). The CO2 content ranges from 0.94 mol% to 3.9 mol%, while the H 2 S content varies from 0 to 1.9 mol%. The lines range in diameter from 20 to 36 inches.  The highest gas flow rate in these lines is 757 MMscfd, and the highest estimated temperature and pressure are 140°F (60°C) and 1050 psig (72 bar), respectively. The study consisted of three parts: 1) uniform corrosion in liquid and gas phases; 2) pitting corrosion in liquid and gas phases; and 3) gas phase corrosion. The absence of dissolved solids and bacteria eliminated the need to study for scaling and microbiolog icallyinfluencedcorrosion (MIC).  The study was conducted using a rotating cage assembly with low alloy carbon steel test coupons and distilled water with 0, 150, and 1000 mg/L chloride.

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