6. ＇TO ATM AT SAFE LOCATION＇MEANS 3000mm ABOVE ANY
PLATFORM OR STAIRWAY WITHIN AN 8000mm RADIUS.
7. 9mm WEEP HOLE SHALL BE PROVIDED IN LOW POINTS
OF RELIEF VALVE DISCHARGES VENTING TO ATMOSPHERE. 在排大气阀的低点有一个9mm的孔来排出液体。
8. BATTERY LIMIT OR ROOT VALVES ARE NOT NECESSARILY
SHOWN ON PROCESS P&IDS. THESE SHOWN BE SHOWN AS REQUIRED ON DISTRIBUTION AND/OR UTILITY P&IDS DURING DETAILED DESIGN.
界区阀和根部阀在工艺流程图中不一定有，但在公用工程的P&IDS图中会有详细资料。
9. PUMP SEAL FLUSHES AND COOLING DETAILS TO BE
PROVIDED BY DETAILED ENGINEERING CONTRACTOR. FOR SPECIAL REQUIREMENTS, SEE PUMP DATA SHEETS OR SCHEDULES.
泵的密封和冷却系统由工程承包商提供，有特殊要求请查看泵的曲线和表。 10. ALL ELEVATIONS SHOWN ARE PRELIMINARY, ELEVATIONS
ARE TO BE FINALIZED DURING DETAILED ENGINEERING, TOWER AND DRUM ELEVATIONS ARE BASED ON REBOILER HYDRAULICS OR PUMP NPSH REQUIRENENTS.
11. BLOCK VALVES FOR ALL INSTRUMENTS SUCH AS
PLPGLI AND LG ARE NOT INDICATED AND THESE BLOCK VALVES
ARE 3/4＂, IF NOT INDICATED.
12. RUNNING SIGNALS FOR ALL MOTOR ARE NOT INDICATED. 所有的马达运行信号不被显示。
21
LINE DESIGATIONS
CONNECTION TO PROCESS, MECHANICAL LINE OR INSTRUMENT INPUT
CAPILLARY TUBING (FILLED SYSTEM)
PNEUMATIC SIGNAL
ELECTRICAL SIGNAL OR
SOFTWARE SIGNAL
HYDRAULIC (LIQOID) SIGNAL
ELECTROMAGNETIC OR SONIC SIGNAL
(INCLUDING RADIO WAVES, NUCLEAR RADIATION,HEAT AND LIGHT)
INSTRUMENT AIR SUPPLY
INSTRUMENT LINE PURGE **-PURGE MEDIUM
(LINE SERVICE IDENTIFICATION OR AS
NOTED) 22
TEMPERATURE INSTRUMENTS
SINGLE THERMOCOUPLE, RTD,
GAUGE OR WELL,
*** - RTD (IF RESISTANCE
TEMPERATURE DETECTOR)
DUPLEX THERMOCOUPLE IN ONE WELL
MULTI-ELEMENT THERMOCOUPLE FOR DIFFERENT ELEVATIONS OR ZONES (INDICATE FIRST AND LAST TAG NUMBERS OR TAG NUMBER SUFFIXES)
TEMPERATURE REGULATOR 温度调节阀
PRESSURE INSTRUMENTS 压力调节器
CONTROLLING SIDE
PRESSURE REDUCING REGULATOR-SELF-CONTAINED
PRESSURE REGULATOR WITH EXTERNAL PRESSURE
TAP 23
DEFFERENTIAL PRESSURE REDUCING WITH EXTERNAL AND EXTERNAL PRESSURE TAPS
SAFETY RELIEF VALVE
PRESSURE AND VACUUM SAFETY
RELIEF VALVE
PILOT OPERATED SAFETY RELIEF VALVE
RELIEVING MANHOLE COVER
PRESSURE OR VACUUM RELIEF
SET PRESS 设定压力
PRESSURE RELIEF RUPTURE DISK
VACUUM RELIEF RUPTURE DISK
FLOW INSTRUMENTS 流量计
ORIFICE PLATE OR RESTRICTION ORIFICE 孔板或限流孔
ORIFICE PLATE IN QUICK CHANGE FITTING
VENTURL FLOW TUBE OR FLOW NOZZLE 文丘里流量计或喷嘴
24
INSERTION TYPE FLOW INSTRUMENT 插入型流量计 FLUME WEIR
ROATMETER 转子流量计
FLOW STRAIGHTENING VANES
EXTERNAL TYPE FLOW INSTRUMENT SPECIFY
OUTSIDE BUBBLE
IN-LINE FLOW INSTRUMENT
SPECIFY TYPE
OUTSIDE BUBBLE
LEVEL INSTRUMENTS 液位计
EXTERNAL LEVEL INSTRUMENT 外部液位计（玻璃板、浮筒式）
INTERNAL FLOAT TYPE LEVEL INSTRUMENT 浮筒式液位计
BUBBLE TYPE LEVEL INSTRUMENT
RADIATION OR SONIC LEVEL INSTRUMENT
TYPE 25
常见的PID图例缩写符号
