Non-wetted parts NACE requirements
Non-wetted parts NACE requirements
(OP)
1) For the Non-wetted parts in a piping or valve suchas external bolts, do we need NACE compliance?
2) Is valve gland flange considered for NACE requirement in a sour service ?
3) Why does wetted parts under compressive stresses such as Trim of a valve needs to follow NACE requirements ?
2) Is valve gland flange considered for NACE requirement in a sour service ?
3) Why does wetted parts under compressive stresses such as Trim of a valve needs to follow NACE requirements ?





RE: Non-wetted parts NACE requirements
2) See answer to #1. You don't want a minor leak to turn into a major one.
3) Materials oftentimes have internal stresses originating from manufacturing processes, welding, etc. This residual stress is at-times enough to facilitate cracking due to sour fluids.