Water Handling NACE: Understanding Corrosion in Low-Pressure Facilities

Introduction

The question pertains to water handling facilities operating at pressures below 0.45 MPa, and the inquiry seeks clarification on whether this means that the possibility of corrosion is low enough to be excluded from standard requirements, or if the consequences of any problem are minimal. The question also asks if low-pressure water handling facilities are free from gas, which could cause hydrogen or SSC problems.

Answer

Water handling facilities typically operate at low service pressures, have a near neutral pH, and contain trace amounts of H₂S. Therefore, the potential for sour service severity is low. However, the user must verify whether these assumptions are correct for the specific equipment in question.

This inquiry pertains to the scope of NACE MR0175/ISO 15156.

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