The API Plans elaborated in this brochure are as defined by API 682 4th edition / API 610 11th edition. These are standardized flushing piping arrangements that are widely used in the industry. Customer specific variants of these plans are possible.
To check out mechanical seal flushing arrangements and piping plans, I have consistently found this to be the most useful and permanent pocket-sized document. This high-quality booklet comprehensively describes both configurational parameters and application criteria
Heinz P. Bloch P.E.
Independent Professional Engineer