/ News & Press / Video / How to Read Process Flow Diagrams (PFDs_PFS) - A Complete Tutorial
How to Read Process Flow Diagrams (PFDs_PFS) - A Complete Tutorial
WEBVTT Kind: captions Language: en
00:00:01.710 [Music] 00:00:08.35000:00:08.360 welcome to hearted engineer calm I am 00:00:11.68000:00:11.690 Warren Patel in this video you will 00:00:14.44000:00:14.450 learn about process flow diagram which 00:00:16.84000:00:16.850 is also known as process flowchart 00:00:18.58000:00:18.590 process flow shapes and process flow 00:00:21.33900:00:21.349 scheme I will explain you how to read 00:00:24.76000:00:24.770 this P of T or P FS with the help of 00:00:28.06000:00:28.070 real time PFD is the base document that 00:00:32.62000:00:32.630 used to develop more complex P&ID 00:00:35.72900:00:35.739 if you want to master P&ID you must 00:00:39.85000:00:39.860 master the PFD so please watch the video 00:00:43.15000:00:43.160 till then please subscribe to my channel 00:00:46.61900:00:46.629 because it helps me to increase my reach 00:00:49.63000:00:49.640 on YouTube and you will also get regular 00:00:52.50900:00:52.519 updates on your video so subscribe now 00:00:56.13000:00:56.140 what is process flow diagram process 00:00:59.91900:00:59.929 flow diagram is a simple drawing that 00:01:02.47000:01:02.480 shows the relationship between major 00:01:05.02000:01:05.030 equipment in process plant using 00:01:07.89900:01:07.909 equipment symbols and shows the primary 00:01:10.96000:01:10.970 process flow path of a unit you can 00:01:14.26000:01:14.270 visualize the flow of material within 00:01:16.90000:01:16.910 the plant with the help of this drawing 00:01:20.16000:01:20.170 what is the use of PFD a process flow 00:01:23.95000:01:23.960 diagram provides a quick overview of 00:01:26.71000:01:26.720 entire operating unit or a system a 00:01:30.39000:01:30.400 technician or engineer can use this 00:01:34.09000:01:34.100 document to trace the flow of the 00:01:36.04000:01:36.050 material through the unit the flow 00:01:39.52000:01:39.530 diagram is also used for the visitor 00:01:42.31000:01:42.320 information and new employee training it 00:01:45.58000:01:45.590 is one of the core document to draw the 00:01:48.04000:01:48.050 plot pant and P&ID what information does 00:01:52.57000:01:52.580 PFD provide a typical PFD will include 00:01:57.04000:01:57.050 all major equipment each equipment shown 00:02:00.76000:02:00.770 on PFD has a unique equipment number and 00:02:03.70000:02:03.710 a descriptive name it also shows main 00:02:07.48000:02:07.490 dimension capacity and operating 00:02:10.05900:02:10.069 information of the equipment 00:02:13.28000:02:13.290 second is process flow stream or 00:02:15.17000:02:15.180 interconnected piping PFD follows 00:02:19.28000:02:19.290 left-right approach for the process flow 00:02:21.64000:02:21.650 that means any process stream enter or 00:02:26.08900:02:26.099 exit either from right or left however 00:02:29.03000:02:29.040 please note that this left/right 00:02:31.61000:02:31.620 approach is not a mandatory requirement 00:02:33.94900:02:33.959 but good engineering practice all 00:02:37.39900:02:37.409 process flow stream shown on PFD 00:02:40.03900:02:40.049 will have a identification number a 00:02:42.28000:02:42.290 description of the process condition and 00:02:44.86900:02:44.879 chemical composition of each stream such 00:02:48.58900:02:48.599 as pressure temperature density mass 00:02:51.86000:02:51.870 flow rate and mass energy balance will 00:02:55.22000:02:55.230 included in PMT this data will be either 00:02:58.90900:02:58.919 displayed directly on PFD or included in 00:03:02.75000:03:02.760 the flow summary table sometime it also 00:03:06.94900:03:06.959 shown minimum normal and maximum value 00:03:10.12900:03:10.139 of this process parameters next is 00:03:13.72000:03:13.730 process flow direction of all process 00:03:16.49000:03:16.500 line control wall and process critical 00:03:20.00000:03:20.010 wall major bypass and recirculation 00:03:23.33000:03:23.340 system and connection with other system 00:03:27.69900:03:27.709 what is not included in PFT 00:03:31.80900:03:31.819 pipe glass and pipeline numbers process 00:03:35.17000:03:35.180 control instruments minor bypass wall 00:03:38.67000:03:38.680 isolation and sort of wall maintenance 00:03:42.09900:03:42.109 vents and drains relief walls and safety 00:03:45.69900:03:45.709 walls and code class information you 00:03:50.94900:03:50.959 must be thinking if this information are 00:03:53.41000:03:53.420 not here then where they are 00:03:55.89000:03:55.900 well these informations are covered in 00:03:59.44000:03:59.450 P&ID which is more complex time than P 00:04:02.28900:04:02.299 of T you will learn about PID in next 00:04:05.55900:04:05.569 video to read PFD PF s pn ID p FS iso 00:04:11.02000:04:11.030 and j drawing knowing the various symbol 00:04:14.47000:04:14.480 for equipment wall and instrument is a 00:04:17.56000:04:17.570 must so if you have not watched the 00:04:20.56000:04:20.570 earlier video on P&ID PFD symbols please 00:04:24.21900:04:24.229 watch that video first link is given in 00:04:27.01000:04:27.020 the description 00:04:29.34000:04:29.350 now look at this PFS or PFD well both 00:04:33.54000:04:33.550 are same you can see the PFS of Oh a 00:04:36.99000:04:37.000 small part of plant fuel oil and slope 00:04:39.45000:04:39.460 tank 00:04:41.24000:04:41.250 let's check the equipment that are using 00:04:44.13000:04:44.140 this system 00:04:46.39900:04:46.409 here you can see the tank pumps 00:04:51.21900:04:51.229 exchanger vessel strainer and jet 00:04:57.49900:04:57.509 mixture on the top of any PFD you can 00:05:02.77900:05:02.789 see the list of all the major equipment 00:05:04.79000:05:04.800 along with its size and capacity 00:05:09.35000:05:09.360 all the main process lines are shown as 00:05:12.35000:05:12.360 a dark black line and the theme black 00:05:14.65900:05:14.669 line are minor process line arrowheads 00:05:18.11000:05:18.120 on the line show the direction of the 00:05:20.62900:05:20.639 flow fuel oil is coming from the other 00:05:23.89900:05:23.909 is bail unit you can see the incoming 00:05:27.20000:05:27.210 arrow with a dark head 00:05:29.46900:05:29.479 if there is no dark hair and a simple 00:05:32.65900:05:32.669 arrow is there like this it means the 00:05:36.20000:05:36.210 line is coming from the same unit you 00:05:39.49900:05:39.509 can see the battery limit between OS 00:05:41.17900:05:41.189 bail and eyes bill this flow system is 00:05:44.57000:05:44.580 numbered as a 1/4 which detail is given 00:05:47.77900:05:47.789 in the table below square box with the 00:05:51.17000:05:51.180 number inside will give you the process 00:05:54.05000:05:54.060 stream number square box with later 00:05:57.49900:05:57.509 inside means it refers to other service 00:06:01.15900:06:01.169 and for the detail of that stream you 00:06:04.58000:06:04.590 have to refer to the PFD of that process 00:06:07.57000:06:07.580 here SL means team line and sale means 00:06:11.92900:06:11.939 condensate line this is generic symbol 00:06:15.23000:06:15.240 of wall if you want to know the exact 00:06:18.37900:06:18.389 type of the wall you have to check the 00:06:20.39000:06:20.400 P&ID then laters NC means normally 00:06:24.89000:06:24.900 closed that means this wall remained 00:06:28.45900:06:28.469 closed during normal operation now look 00:06:32.30000:06:32.310 at this clue 00:06:33.73000:06:33.740 this is circulation loop fuel oil from 00:06:38.05900:06:38.069 the tank is supplied to the pump which 00:06:41.65900:06:41.669 is passed through the heat exchanger and 00:06:43.67000:06:43.680 returned to the tank you have to 00:06:46.96900:06:46.979 maintain the temperature of the fuel oil 00:06:48.92000:06:48.930 otherwise it will get thick and chalk 00:06:52.01000:06:52.020 the line and also settle in the tank you 00:06:55.14900:06:55.159 can see that there are two control wall 00:06:58.27900:06:58.289 are shown in this loop one will maintain 00:07:01.24900:07:01.259 the temperature by controlling the steam 00:07:03.35000:07:03.360 and the second will maintain the flow 00:07:06.15900:07:06.169 the symbols of the wall is generic 00:07:09.20000:07:09.210 symbol of the remotely actuated wall it 00:07:12.40900:07:12.419 can be hydraulic pneumatic or motor 00:07:15.32000:07:15.330 operated type if you are interested in 00:07:19.01000:07:19.020 learning more about wall and their 00:07:21.13900:07:21.149 function you can buy 00:07:23.11900:07:23.129 my full course on the wall in which I 00:07:25.76000:07:25.770 have got more than 18 types of wall yes 00:07:29.80900:07:29.819 this is marketing because that is how I 00:07:32.35900:07:32.369 earn money to produce the good quality 00:07:34.69900:07:34.709 videos so please support by purchasing 00:07:37.54900:07:37.559 my course now back to our PFT see this 00:07:42.55900:07:42.569 detail of pump recycle pump has a head 00:07:46.24900:07:46.259 of 60 meters and the plant fuel oil has 00:07:49.15900:07:49.169 a head of 216 meters this must be a huge 00:07:54.22900:07:54.239 come let's look where they are on PFD 00:07:58.95900:07:58.969 let me adjust the PFD on the screen so 00:08:01.96900:08:01.979 that we can conclude our video 00:08:03.55900:08:03.569 oh these pumps are turbine driven that 00:08:08.80900:08:08.819 means these are critical pumps normally 00:08:12.32000:08:12.330 turbine driven pumps are provided where 00:08:15.19900:08:15.209 you want to run the pump even if there 00:08:17.83900:08:17.849 is a total power failure in your plant 00:08:20.29000:08:20.300 here we have a 2 basket strainer one on 00:08:24.35000:08:24.360 a suction side and other on a pump 00:08:26.32900:08:26.339 discharge side and we also have a heat 00:08:29.62900:08:29.639 exchanger to maintain the temperature of 00:08:31.63900:08:31.649 the fuel oil the suction strainer will 00:08:35.14900:08:35.159 protect the pump impeller from any 00:08:37.10000:08:37.110 foreign object that can damage the pump 00:08:39.49900:08:39.509 and the discharge strainer will ensure 00:08:42.86000:08:42.870 the clean supply to the user unit you 00:08:46.46000:08:46.470 can see the temperature control loop 00:08:48.13900:08:48.149 also here you can see the battery limit 00:08:53.03000:08:53.040 of ice volando SPL fuel oil is supplied 00:08:56.80900:08:56.819 to various ice value in its furnaces on 00:09:00.59000:09:00.600 is Bill sight 00:09:02.03000:09:02.040 you can see that one pressure control 00:09:04.40000:09:04.410 wall is given which ensure constant 00:09:08.36000:09:08.370 pressure in the fuel oil loop now let's 00:09:12.19900:09:12.209 look at this trim table lots of process 00:09:16.93900:09:16.949 parameter such as pressure temperature 00:09:19.72000:09:19.730 flow rate and other details are given in 00:09:22.79000:09:22.800 this table have a look on it 00:09:27.07900:09:27.089 this is all about PMT you have learned 00:09:30.19900:09:30.209 almost all detail that PFD provides in 00:09:34.34000:09:34.350 next video I will explain you about the 00:09:36.65000:09:36.660 P&ID visit my website hotter than zero 00:09:39.88900:09:39.899 comm to download free study materials 00:09:42.23000:09:42.240 and don't forget to subscribe my channel 00:09:44.38900:09:44.399 to get regular updates on your video and 00:09:46.86900:09:46.879 also like and share my video with your 00:09:49.54900:09:49.559 friends if you want to request a video 00:09:51.88900:09:51.899 please write in the comment see you soon 00:09:54.65000:09:54.660 good bye 00:09:55.16000:09:55.170 take care
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