Definition(s)
H2S Trim
All components, except external valve body, meeting the H2S service requirements of ISO 15156-2 and ISO 15156-3. NOTE For the purposes of this provision, NACE MR0175 is equivalent to ISO 15156–2 and ISO 15156–3.
Source: API SPEC 7-1, Specification for Rotary Drill Stem Elements, First Edition, March 2006 (Addendum April 2011). Global Standards