NPFC - MIL-PRF-32217
SCALE PREVENTION IN SEWAGE COLLECTION, HOLDING AND TRANSFER (CHT) AND VACUUM CHT (VCHT) PIPING SYSTEMS FOR USE ON NAVAL SURFACE SHIPS
|Publication Date:||29 November 2011|
This specification covers requirements for scale prevention in sewage collection, holding and transfer (CHT) and vacuum CHT (VCHT) piping systems for use on naval surface ships, including the use of scale prevention chemical products and non-chemical (physical treatment) processes and systems to prevent scale formation in shipboard collection sewage piping systems.
All scale prevention systems are intended for preventing the buildup of scale deposits in shipboard sewage drain piping.