Purchasing Guide for Wellhead & Christmas Tree ... - Stream Flo

Relative CorrosivityThe minimum partial pressure of carbon dioxiderequired to initiate corrosion and the relativeeffect of increasing partial pressures on thecorrosion rate are strongly influenced by otherenvironmental factors:a) temperatureb) H 2S levelc) pHd) chloride ion concentratione) sand productionf) water production and compositiong) types and relative amounts of producedhydrocarbonsFinally, the purchaser should consider future service of the well when selecting a material class. Thisshould not be limited to anticipated changes in the acid gas partial pressures for production or increasedwater production with or without increased chloride content, but also should include consideration ofoperations such as acidification or other well treatments.Relative Corrosiveness of Retained Fluidsas Indicated by CO 2Partial PressureRetained Fluids Retained Fluids Retained Fluids Mpa Retained Fluids (psia)general service noncorrosive 30)sour service noncorrosive