INLINE INSTRUMENTS 在线仪表
FLAME ARRESTOR
CONTINUOUS DRAINER
OPTIONAL VENT LINE
EXCESS FLOW VALVE
PROCESS STEAM TRAP
ANALYZER
ANALYTICAL COMPONENT OR PHYSICAL PROPERTY
PURGING DETAIL DIAPHRAGM SEALS
PIPED CONNECTION
FLUSH MOUNTED
TRACING
CONVENTIONAL INSTRUMENTATION
DIGITAL INSTRUMENTATION
PUSHBOTTON , SWITCHES & LIGHTS
INDICATING LIGHT
PUSHBOTTON
PUSHBOTTON WITH LIGHT
SWITCH
SWITCH WITH LIGHT(LIGHT INCLUDED FOR PUSHBUTTON FUNCTION)
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EACH
HIGH/LOW OPEN/CLOSE
LIGHT DESIGNATION
MEASURED VARIABLE
FUNCTION
BYP BY PASS
HOA HAND/OFF//AUTOMATIC
O/C OPEN/CLOSE
RESET
S/S START/STOP
TRIP TRIP NOTES
1. FOR PIPING AND EQUIPMENT SYMBOLS , SEE DWG 000054
THE INSTRUMENTATION REPRESENTATION ON P&I FLOW DIAGRAMS, IN GENERAL , CONSISTS OF A SINGLE OR SEVERAL BALOONS SUFFICIENT FOR FUNCTIONAL DEFINATION, COMPLEX OR UNUASUAL LOOPS ARE DIPECTED WITH INDIVIDUAL COMPONENT BALOONS AS REQUIRED FOR CLARITY.
3. ALL CONTROL ROOM INSTRUMENTS ARE LOCATED IN THE CENTRAL CONTROL ROOM UNLESS OTHERWISE NOTES.
NEEDLE VALVE AND CHECK VALVE ARE INTEGRAL PART OF ROTAMETER.
AN INSTRUMENT NUMBER WITH AN X SUFFIX OR AN X IN PLACE OF THE LOOP NO. DENOTES THE INSTRUMENT IS FURNISHED AS PART OF AN EQUIPMENT
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PACKAGE.
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PID图例符号介绍
