P & I DIAGRAM AND TAGGING PHILOSPHY FOR PLANT EQUIPMENT & INSTRUEMENT PRESENTED BY PREM BABOO
P & I DIAGRAM A piping and instrumentation diagram/drawing (P&ID) is a diagram in the process industry which shows the piping of the process flow together with the installed equipment and instrumentation. P&IDs is important to everyone involved in the planning, design, and construction through operation of a process plant.
Abbreviations P&ID - stands for "Piping and Instrumentation Diagram PACS - means Process and Control Systems, Inc PACE - means Process and Control Engineering PCI -means PROCESS CONTROL INSTRUMENTATION PCED - means Process Control Event Diagram PNID - means Process and Instrumentation Diagram
1. A diagram which shows the interconnection of process equipment and the instrumentation used to control the process. In the process industry, a standard set of symbols is used to prepare drawings of processes. The instrument symbols used in these drawings are generally based on International Society of Automation (ISA) Standard -S5. 1. 2. The primary schematic drawing used for laying out a process control installation .
P&IDs play a significant role in the maintenance and modification of the process that it describes. It is critical to demonstrate the physical sequence of equipment and systems, as well as how these systems connect. During the design stage, the diagram also provides the basis for the development of system control schemes, allowing for further safety and operational investigations, such as a Hazard and operability studycommonly pronounced as HAZOP . For processing facilities, it is a pictorial representation of 1. Key piping and instrument details 2. Control and shutdown schemes 3. Safety and regulatory requirements 4. Basic start up and operational information
TAGGING PHILOSPHY Tag “numbers” are letters and numbers placed within or near the instrument to identify the type and function of the device PRESSURE LEVEL FLOW TEMP PIC PRC LIC L RC FIC FRC T IC TRC
TAG DESCRIPTORS X Y Z 1 2 3 The first letter is used to designate the measured variable The succeeding letter(s) are used to designate the function of the component, or to modify the meaning of the first letter 1. PRESSURE 2. LEVEL 3. FLOW 4. TEMPERATURE 1 . INDICATOR 2. RECORDER 3. CONTROLLER 4. TRANSMITTER
LETTER USED FOR EQUIPMENT Sr. No. NAME OF EQUIPMENTS LETTER USED 1 REACTOER VESSEL R,V 2 PUMP P 3 COMPRESSOR/BLOWER K 4 TURBINE T 5 ABSORBER C 6 7 SEPERATOR HOLDER MV ME 8 EJECTOR EJ 9 HEAT EXCHANGER E
CODE USE FOR SECTIONWISE For HP section digit are used single digit e.g. 31 R-1 31 used for section R—equipment(Reactor) For MP section Digit Series used for101, e.g. LIC 101 For LP section series used for 131 e.g LIC 131 Vacuum section used Series 141 e.g. PIC 141 For Common Section series used 160 e.g PIC 161
TAG NUMERS Tag “numbers” are letters and numbers placed within or near the instrument to identify the type and function of the device Thermometer Temperature Transmitter Temperature Controller & Recorder Pneumatic Control Valve Temperature sensing bulb TI TRC FCV
Piping and Connection Symbols
Valve Symbols
ANGLE VALVE ANGLE VALVE (MOTORIZED)
GLOBE VALVE GATE VALVE
BUTTERFLY VALVES
GLOBE VALVE
DIAPHRAGM VALVE
PRESSURE SAFETY VALVES Safety Valve is a one type of valve that automatically actuates when the pressure of inlet side of the valve increases to a predetermined pressure, to open the valve disc and discharge the fluid ( steam or gas ) ; and when the pressure decreases to the prescribed value, to close the valve disc again.
CHECK VALVES Check Valve symbol A check valve, non-return valve or one-way valve is a valve that normally allows fluid (liquid or gas)to flow through it in only one direction .
CONTROL VALVE ISOLATION VALVE ISOLATION VALVE BYPASS VALVE DRAIN VALVE STEAM LINE
Process Flow Diagram - PFD A PFD shows less detail than a P&ID and is used only to understand how the process works
PUMPS
HEAT EXCHANGERS
CODING FOR PIPPING SYSTEM ID of the pipe Section Name Fluid Name Line Code
UREA –II (P) EQUIPEMENT LIST 31 UNIT SR.NO EQUIPMENT DESCRIPTION TAG NO 1 MP ABSORBER 31-C-1 2 DISTILLATION TOWER 31-C-2 3 STRIPPER 31-E-1 4 HP AMMONIA PREHEATER 31-E-4 5 CARBAMATE CONDENSOR 31-E-5 6 MP CONDENSER 31-E-7 7 LP CONDENSER 31-E-8 8 AMMONIA CONDENSER 31-E-9A/B 9 MP AMMONIA ABSORBER / INERT GAS WASHING TOWER 31-E-31/C-3 10 LP AMMONIA ABSORBER / INERT GAS WASHING TOWER 31-E-12/C-4 11 I VACUUM CONCENTRATOR 31-E-14 A/B 12 II VACUUM CONCENTRATOR 31-E-15 13 DISTILLATION TOWER OVERHEAD CONSENSER 31-E-17 14 DISTILLATION TOWER OVERHEAD PREHEATER 31-E-18 15 HYDROLYSER PREHEATER 31-E-19A/B 16 PURIFIED WASTE WATER COOLER 31-E-20A/B 17 STEAM CONSENSOR COOLER 31-E-41A/B 18 I INTERSTAGE COOLER (K-1) 31-E-25 19 II INTERSTAGE COOLER (K- 1) 31-E-26 20 III INTERSTAGE COOLER (K-1) 31-E-27 21 FINAL STEAM CONDENSER COOLER 31-E-30A/B 22 I AND II VACUUM SYSTEM CONDENSERS 31-E -41,42 23 CARBAMATE RECYCLE EJECTOR 31-EJ-1 24 CO2 COMP 31-K-1 25 PASSIVATION AIR COMP TO K-1 31-K-2 A/B 26 PASSIVATION AIR COMP TO C.T 08 K-2 A/B 27 I AND II VACUUM SYSTEM 31-ME-4/ 5 28 PRILLING BUCKET 31-ME-8 29 PRILLING BUCKET SUPPORT 31-ME-9 30 ROTARY SCRAPPER 31-ME-10 31 BLOW DOWN 31-ME-14 32 FIRST VENT STACK 31-ME-15 33 DISC OIL 31-ME-20 34 II VENT STACK 31-ME-41
35 HP AMMONIA FEED PUMP MOTOR 31-MP-1 A/B 36 CARBAMATE SEPERATOR 31-MV-1 37 MP DECOMPOSER 31-MV-2, E-2, ME-2 38 LP DECOMPOSER 31-MV-3, E-3, ME-3 39 STRIPPER STEAM COND SEPERATOR 31-MV-4 40 I VACUUM SEPERATOR 31-MV-6 41 II VACUUM SEPERATOR 31-MV-7 42 CO2 COMP.DELIVERY DRUM 31-MV-8 43 CO2 COMP. K. O DRUM 31-MV-9 44 I INTERSTAGE SEPERATOR (K-1) 31-MV-16 45 II INTERSTAGE SEPERATOR (K-1) 31-MV-17 46 III INTERSTAGE SEPERATOR (K-1) 31-MV-18 47 HP AMMONIA FEED PUMP 31-P-1 A/B 48 COOLING WATER PUMPS 08 P-1 A/B/C 49 HP CARBAMATE SOLUTION PUMP 31-P-2 A/B 50 MP CARBAMATE SOLUTION PUMP 31-P-3 A/B 51 CW CIRCULATION PUMP FOR E-7 31-P-4 A/B 52 AMMONIA BOOSTER PUMP 31-P-5 A/B 53 MP STEAM COND FLUSHING PUMP 31-P-6 A/B 54 AMMONIA SOLUTION PUMP 31-P-7 A/B 55 UREA MELT PUMP 31-P-8 A/B 56 UREA SOLUTION PUMP FOR V-5 31-P-9 A/B 57 HP WASHING PUMP 31-P-11 A/B 58 DRAIN RECOVERY PUMPS FOR V-7 31-P-12 A/B 59 STEAM COND TO B.L. PUMP 31-P-13 A/B 60 HYDROLYZER FEED PUMPS 31-P-14 A/B/C 61 DISTILLATION TOWER REFLUX FEED PUMP 31-P-15 A/B 62 C2 FEED PUMPS 31-P-16 A/B 63 STRIPPER DP CELL FLUSH PUMP 31-P-17 A/B 64 PURIFIED WASTE WATER PUMP 31-P-18 A/B 65 UREA SOLUTION RECOVERY PUMP FOR V-4 31-P –19 A/B/C 66 CARBAMATE SOLUTION RECOVERY PUMPS 31-P-20 A 67 BUFFER WASTE WATER TANK FEED PUMPS 31-P-41 A/B 68 OILY WATER PUMPS 31-P-23 A/B 69 COND PUMP OF TK-1 31-P-27 A/B 70 EFFLUENT DISPOSAL PUMPS 31-P-33 A/B 71 UREA REACTOR 31-R-1 72 HYDROLYZER 31-R-2 73 TURBINE FOR K-1 31-TK-1 74 AMMONIA RECEIVER 31-V-1 75 STEAM CONDENSOR TANK 31-V-2 76 CARBAMATE SOLUTION TANK 31-V-3
77 UREA LUMP DISSOLVING TANK 31-V-4 78 UREA SOLUTION TANK 31-V-5 79 BUFFER WASTE WATER TANK 31-V-6 80 DRAIN COLLECTING TANK 31-V-7 81 REFIUX ACCUMULATOR 31-V-8 82 WASTE WATER TANK 31-V-9 83 SLOP OIL TANK 31-V-20 84 INSTRUMENT AIR RECEIVER TANK 31-V-41 85 MAIN OIL PUMP FOR K-1 31 P-24 A/B 86 EMERGENCY OIL PUMP FOR K-1 31 P- 25 87 CONDENSATE COOLER 31/E-13
UREA –II (P ) EQUIPEMENT LIST 41 UNIT SR.NO EQUIPMENT DESCRIPTION TAG NO 1 MP ABSORBER 41-C-1 2 STRIPPER 41-E-1 3 HP AMMONIA PREHEATER 41-E-4 4 CARBAMATE CONDENSOR 41-E-5 5 MP CONDENSER 41-E-7 6 LP CONDENSER 41-E-8 7 AMMONIA CONDENSER 41-E-9A/B 8 MP AMMONIA ABSORBER / INERT GAS WASHING TOWER 41-E-31/C-3 9 LP AMMONIA ABSORBER / INERT GAS WASHING TOWER 41-E-12/C-4 10 II VACUUM CONCENTRATOR 41-E-15 31 I INTERSTAGE COOLER (K-1) 41-E-25 12 II INTERSTAGE COOLER (K- 1) 41-E-26 13 III INTERSTAGE COOLER (K-1) 41-E-27 14 I AND II VACUUM SYSTEM CONDENSERS 41-E -41,42 15 CARBAMATE RECYCLE EJECTOR 41-EJ-1 16 CO2 COMP 41-K-1 17 PASSIVATION AIR COMP TO K-1 41-K-2 A/B 18 I AND II VACUUM SYSTEM 41-ME-4/ 5 19 HP AMMONIA FEED PUMP MOTOR 41-MP-1 A/B 20 CARBAMATE SEPERATOR 41-MV-1 41 MP DECOMPOSER 41-MV-2, E-2, ME-2 22 LP DECOMPOSER 41-MV-3, E-3, ME-3 23 STRIPPER STEAM COND SEPERATOR 41-MV-4 24 I VACUUM SEPERATOR 41-MV-6 25 II VACUUM SEPERATOR 41-MV-7 26 CO2 COMP.DELIVERY DRUM 41-MV-8 27 CO2 COMP. K. O DRUM 41-MV-9 28 I INTERSTAGE SEPERATOR (K-1) 41-MV-16 29 II INTERSTAGE SEPERATOR (K-1) 41-MV-17 30 III INTERSTAGE SEPERATOR (K-1) 41-MV-18 31 HP AMMONIA FEED PUMP 41-P-1 A/B 32 HP CARBAMATE SOLUTION PUMP 41-P-2 A/B 33 MP CARBAMATE SOLUTION PUMP 41-P-3 A/B 34 CW CIRCULATION PUMP FOR E-7 41-P-4 A/B 35 AMMONIA BOOSTER PUMP 41-P-5 A/B 36 AMMONIA SOLUTION PUMP 41-P-7 A/B 37 UREA MELT PUMP 41-P-8 A/B 38 DRAIN RECOVERY PUMPS FOR V-7 41-P-12 A/B 39 STRIPPER DP CELL FLUSH PUMP 41-P-17 A/B 40 BUFFER WASTE WATER TANK FEED PUMPS 41-P-21 A/B 41 COND PUMP OF TK-1 41-P-27 A/B 42 UREA REACTOR 41-R-1 43 TURBINE FOR K-1 41-TK-1 44 AMMONIA RECEIVER 41-V-1 45 CARBAMATE SOLUTION TANK 41-V-3 46 DRAIN COLLECTING TANK 41-V-7 47 WASTE WATER TANK 41-V-9 48 MAIN OIL PUMP FOR K-1 41 P-24 A/B 49 EMERGENCY OIL PUMP FOR K-1 41 P- 25
BLOCK DIAGRAM A block diagram is a diagram of a system in which the principal parts or functions are represented by blocks connected by lines that show the relationships of the blocks . They are heavily used in engineering in hardware design, electronic design, software design, and process flow diagrams . A block diagram is a specialized, high-level flowchart used in engineering. It is used to design new systems or to describe and improve existing ones. Its structure provides a high-level overview of major system components, key process participants, and important working relationships.