GB/T 50933-2013 石油化工装置设计文件编制标准(英文版)
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2.2 Abbreviations

2.2.1 APC——advanced process control;

2.2.2 DCS——distributed control system;

2.2.3 PFD——process flow diagram;

2.2.4 P&ID——piping & instrument diagram;

2.2.5 FGS——fire and gas detection system;

2.2.6 HVAC——heating,ventilation & air condition;

2.2.7 PCS——process computer system;

2.2.8 PLC——programmable logic controller;

2.2.9 SCADA——supervisory control and data acquisition;

2.2.10 SIS——safety instrumentation system;

2.2.11 UID——utility piping & instrument diagram.