What is the standard equipment numbering system used in process plants?

Standard equipment numbering follows the format: Area-Type-Sequence (e.g., 100-P-101). Area number indicates plant section (100, 200, etc.). Type letter indicates equipment category: P=pump, V=vessel, T=tower/column, E=heat exchanger, C=compressor, R=reactor, F=furnace, D=drum, TK=tank. Sequence number is unique within area and type. Additional suffixes: A/B for parallel equipment, R for spare. This system provides: quick equipment identification, location indication, consistent referencing across documents, and maintenance tracking. Companies may have variations, but the principle of area-type-sequence is standard.