Which publication provides guidance on acid cleaning of heat exchangers?

The publication that provides guidance on acid cleaning of heat exchangers is NSTM 531. This document is specifically designed to address naval shipboard maintenance procedures, including the cleaning and maintenance of various systems such as heat exchangers, using acid solutions when necessary.

Acid cleaning techniques are often employed to remove scale, corrosion, and other contaminants from water-cooled heat exchangers to maintain their efficiency and operational reliability. NSTM 531 details the procedures, safety measures, and types of acids that may be used, ensuring that personnel follow best practices while adhering to safety standards.

Other publications, such as the ASME Boiler Code and the Navsea Technical Manual, may contain general standards or guidelines pertaining to boiler and pressure vessel safety or overall technical guidance for naval operations. However, they do not specifically focus on the procedures for acid cleaning heat exchangers. MWO 1234 is likely a maintenance work order publication that may not provide technical guidance on cleaning procedures. Therefore, NSTM 531 is the most relevant resource for proper instruction on acid cleaning in this context.