Trim material selection
Trim material selection
(OP)
Dear All,
Crude details are as follows:
Pressure = 55 psig, H2s mole fraction = 0.0011 and partial pressure of H2S = 0.07667 psia, NACE Sour = YES and
Formation water analysis:
Chloride content = 161500 mg/l and pH=5.7
Please suggest me how to select valve trim material based on NACE MR 0175?
Crude details are as follows:
Pressure = 55 psig, H2s mole fraction = 0.0011 and partial pressure of H2S = 0.07667 psia, NACE Sour = YES and
Formation water analysis:
Chloride content = 161500 mg/l and pH=5.7
Please suggest me how to select valve trim material based on NACE MR 0175?





RE: Trim material selection
As a starter, with that chloride concentration, you will not be able to select 316 internals for a temperature (you have to decide whether that will be design temperature, or maximum operating temperature if different) above 60 degrees C without a) a laboratory qualification test programme, or b) instruction from the end user that they have satisfactory experience for such material in the same application in the same environment at the same temperature.
Simples
Steve Jones
Corrosion Management Consultant
http://www.linkedin.com/pub/8/83b/b04
All answers are personal opinions only and are in no way connected with any employer.
RE: Trim material selection
Valve body material is CS. We are selecting the material based on ISO 15156 part 3.Finally, Inconel 625 is selected as trim material.
thanks