CSA Z620.2:20

1.1 Compressor types This Standard applies to compressor seal vent gas from reciprocating compressor rod packings and centrifugal compressor seals, including any auxiliary and support systems that are required for proper operation of the packing or sealing system. The procedures considered in this Standard include compressor seal vent gas system tracing and alternate flow path identification, backpressure minimization, compressor seal vent gas loss management, measurement procedures, calculations, and data recording. 1.2 Exclusions This Standard does not apply to (non-exhaustive list) a) non-routine venting (e.g., compressor blowdown vents, engine starter vents); b) other devices or components related to the compressor (e.g., pneumatics, pumps, variable volume clearance pockets); c) fugitive emission management programs (e.g., leaking valves or connectors not associated with the compressor seal vent gas system); d) measurement devices that do not internally admit the entire compressor seal vent gas flow in order to take a measurement (remote sensing or quantitative optical gas imaging); and e) quantification of unburnt hydrocarbon or methane emissions in combustion devices (e.g., engines, turbines). 1.3 Gauge pressure All references to “kPa” throughout this Standard are to be considered gauge pressures unless otherwise specified. 1.4 Terminology In this Standard, “shall” is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the standard; “should” is used to express a recommendation or that which is advised but not required; and “may” is used to express an option or that which is permissible within the limits of the Standard. Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material. Notes to tables and figures are considered part of the table or figure and may be written as requirements. Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application.