If water is present in acid gases, the conditions may be very corrosive. Low-alloy steels are commonly utilized in “dry” Acid Gas Injection wells that are designed to be “water-free”. However, low compressor discharge temperatures can cause water formation even in “dry” acid gas wells. Casing and tubing are also exposed to ground water below the packer.
While stainless steels may provide sufficient resistance to corrosion from CO2, the partial pressure of H2S in the acid gas often exceeds the limits of stainless steels. In these situations, a nickel-base alloy is recommended to adequately resist corrosion. For temperatures below 270F, 2535 has proven to be a reliable choice, while for higher temperatures 2550 is an effective option.
PipeSearch has several options suitable for these applications available for quick release.
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