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Definition of “Sour Service”

asked Aug 25, 2014 in Engineering by aodai (1,960 points)
Can someone provide detailed descriptions of Sour Service?

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answered Aug 26, 2014 by belmoreno (2,190 points)

Sour service can be described as follows:

  • Gas phase where the H2S partial pressure exceeds 0.05 psia (0.34 kPa).
  • Single phase liquids that are in equilibrium with a gas phase, where the gas phase H2S partial pressure exceeds 0.05 psia (0.34 kPa).
  • For single phase liquids that are not in equilibrium with a gas phase, the liquid’s bubble point pressure and gas composition is determined at the operating temperature. The liquid is considered sour if this bubble point gas phase H2S partial pressure exceeds 0.05 psia (0.34 kPa).
  • The presence of water is not required for a gas and/or liquid to be considered to be sour.
  • There is no minimum pressure to avoid designating a gas or liquid as sour.
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