23:00 -

: In North American master specifications (CSI MasterFormat), Section 23 23 00 covers Refrigerant Piping . A "piece" in this context refers to specialized hardware like refrigerant split patterns or factory-coated fabrication parts.

: Companies like BMW use specific part numbers starting with 23 00 , such as specialized hex bolts or gasket rings

: It falls within the "Evening" (roughly 6 PM – 12 AM) or "Night" (sunset – sunrise).