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Online Course - TEMA Shell & Tube Heat Exchangers 2.1

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Language: en

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welcome back to the shell and tube heat
00:00:02.780 00:00:02.790 exchangers part 2 you online course you
00:00:06.410 00:00:06.420 are watching the introductory video of
00:00:08.270 00:00:08.280 module 1 getting started this video is a
00:00:12.499 00:00:12.509 quick overview of the different contents
00:00:14.419 00:00:14.429 you have to get acquainted with prior
00:00:16.400 00:00:16.410 any development the contents that will
00:00:20.810 00:00:20.820 be covered in this module have been
00:00:22.580 00:00:22.590 outlined to acquire a solid background
00:00:25.040 00:00:25.050 of general vocabulary and terminology
00:00:29.919 00:00:29.929 contents in this module are arrangement
00:00:33.979 00:00:33.989 of shell and tube heat exchangers design
00:00:36.860 00:00:36.870 codes as me8 division 1 code design
00:00:42.170 00:00:42.180 conditions material selection mechanical
00:00:46.490 00:00:46.500 properties of steel and a low oil stress
00:00:52.389 00:00:52.399 in a shell and tube heat exchanger 2
00:00:55.400 00:00:55.410 fluids circulating at different
00:00:57.049 00:00:57.059 temperature conditions exchange heat
00:00:59.389 00:00:59.399 through the walls of the tubes without
00:01:01.520 00:01:01.530 direct contact between the fluids the
00:01:07.609 00:01:07.619 fluid flowing inside the heat transfer
00:01:10.160 00:01:10.170 tubes that belongs to the tube bundle
00:01:12.530 00:01:12.540 defines the tube side of a shell and
00:01:14.990 00:01:15.000 tube heat exchanger on the contrary the
00:01:19.460 00:01:19.470 fluid flowing inside the shell of the
00:01:21.170 00:01:21.180 exchanger defines the shell side of a
00:01:23.870 00:01:23.880 shell and tube heat exchanger depending
00:01:28.010 00:01:28.020 on the many different configurations
00:01:29.960 00:01:29.970 available shell and tube heat exchangers
00:01:32.450 00:01:32.460 are formed by different elements the
00:01:35.749 00:01:35.759 picture shows the main parts of a
00:01:37.969 00:01:37.979 floating to sheet type shell and tube
00:01:40.310 00:01:40.320 heat exchanger widely used in
00:01:42.649 00:01:42.659 petrochemical refineries
00:01:45.950 00:01:45.960 the main reason that led to the
00:01:47.720 00:01:47.730 development of these design codes was
00:01:50.060 00:01:50.070 essentially to relate shell and tube
00:01:51.740 00:01:51.750 heat exchangers manufacturers in order
00:01:53.960 00:01:53.970 to unify the design criteria and produce
00:01:56.720 00:01:56.730 better final quality equipment in other
00:01:59.240 00:01:59.250 words safer exchangers it can be said
00:02:04.760 00:02:04.770 that there are two groups of design
00:02:06.230 00:02:06.240 codes mechanical design codes and
00:02:09.280 00:02:09.290 pressure design codes since a heat
00:02:13.280 00:02:13.290 exchanger is also a pressure vessel each
00:02:16.580 00:02:16.590 mechanical design codes relates with a
00:02:18.830 00:02:18.840 pressure vessel code the pressure
00:02:21.410 00:02:21.420 vessels codes to be used is defining the
00:02:24.170 00:02:24.180 scope of each mechanical design code the
00:02:28.520 00:02:28.530 most widely used codes for the
00:02:30.320 00:02:30.330 mechanical design are the tama code
00:02:32.770 00:02:32.780 largely used in metro Chemical
00:02:35.060 00:02:35.070 refineries and applications in general
00:02:36.920 00:02:36.930 and the hei standard mainly used for
00:02:42.560 00:02:42.570 power plants both codes prescribe the
00:02:46.250 00:02:46.260 use of the asthma section eight code for
00:02:48.949 00:02:48.959 the design pressure in this course we
00:02:54.860 00:02:54.870 will focus on asthma code section eight
00:02:57.380 00:02:57.390 division one the organization of the
00:03:00.470 00:03:00.480 code follow this structure shown in the
00:03:03.140 00:03:03.150 next slide it has three main subsections
00:03:07.449 00:03:07.459 subsection a general requirements where
00:03:12.979 00:03:12.989 the most used parts within this section
00:03:15.020 00:03:15.030 is part ug general requirements for all
00:03:18.860 00:03:18.870 construction methods and all materials
00:03:21.970 00:03:21.980 then we have subsection B fabrication
00:03:25.670 00:03:25.680 requirements in this case the most used
00:03:29.180 00:03:29.190 part within this section is part u-w
00:03:32.949 00:03:32.959 requirement for pressure vessels
00:03:35.000 00:03:35.010 manufactured by welding
00:03:37.990 00:03:38.000 then there is subsection C material
00:03:41.510 00:03:41.520 requirement were the most use part
00:03:44.690 00:03:44.700 within this section is part UCS
00:03:48.100 00:03:48.110 00:03:50.030 00:03:50.040 constructor out of carbon steel and low
00:03:52.820 00:03:52.830 alloy steel and finally we have the
00:03:57.199 00:03:57.209 offenses mandatory and non-mandatory the
00:04:02.660 00:04:02.670 adequate definition of the design
00:04:04.729 00:04:04.739 condition is a stepping stone of any
00:04:07.160 00:04:07.170 satisfactory design in some cases the
00:04:10.339 00:04:10.349 real difficulty of the calculation
00:04:11.960 00:04:11.970 process lies with definition of the
00:04:14.150 00:04:14.160 design conditions pressure and
00:04:17.539 00:04:17.549 temperature are just two of the many
00:04:19.969 00:04:19.979 design constraints that should be taken
00:04:22.159 00:04:22.169 into account some of them are
00:04:25.240 00:04:25.250 temperature as in ambient temperature
00:04:28.370 00:04:28.380 MDM t design temperature pressure
00:04:32.379 00:04:32.389 operating design mouth test pressure
00:04:35.890 00:04:35.900 loading dead loads live loads cyclic
00:04:39.590 00:04:39.600 loading corrosion allowance or liquid
00:04:42.770 00:04:42.780 level wind and seismic conditions esteem
00:04:48.590 00:04:48.600 out hydrostatic task requirements
00:04:52.659 00:04:52.669 transportation and lifting conditions
00:04:55.810 00:04:55.820 material selection and pressure vessel
00:04:58.400 00:04:58.410 design depend on these design conditions
00:05:01.960 00:05:01.970 the Asthma code does not recommend or
00:05:04.879 00:05:04.889 suggest any material for any particular
00:05:07.190 00:05:07.200 application the code merely states what
00:05:11.090 00:05:11.100 materials are allowed and the
00:05:12.590 00:05:12.600 requirements they have to comply with in
00:05:16.760 00:05:16.770 order to select an adequate material for
00:05:19.400 00:05:19.410 a concrete application the following
00:05:21.710 00:05:21.720 properties shall be evaluated allowable
00:05:25.219 00:05:25.229 stress corrosion resistance temperature
00:05:29.870 00:05:29.880 resistance and toughness or resilience
00:05:34.850 00:05:34.860 first of all the main mechanical
00:05:37.309 00:05:37.319 properties of steel must be known the
00:05:41.300 00:05:41.310 basic mechanical properties of steel can
00:05:43.850 00:05:43.860 be obtained through a typical stress
00:05:45.649 00:05:45.659 strain test the diagram shows point a is
00:05:50.029 00:05:50.039 known as yield point if the tension load
00:05:53.360 00:05:53.370 is released at any point below point a
00:05:55.749 00:05:55.759 the material returns to its initial
00:05:58.219 00:05:58.229 state without any permanent deformation
00:06:01.360 00:06:01.370 when this point is exceeded the material
00:06:04.670 00:06:04.680 is no longer elastic releasing the load
00:06:07.550 00:06:07.560 on this range lifts the specimen with
00:06:10.490 00:06:10.500 the permanent or plastic deformation
00:06:13.749 00:06:13.759 point B is known as tensile stress and
00:06:17.179 00:06:17.189 Point C is known as rupture point
00:06:22.809 00:06:22.819 interestingly enough none of the
00:06:25.550 00:06:25.560 aforementioned points is used for the
00:06:27.439 00:06:27.449 design of pressure vessels so what is
00:06:30.740 00:06:30.750 the allowable stress to be considered in
00:06:32.749 00:06:32.759 our designs pressure vessels among other
00:06:36.619 00:06:36.629 mechanical equipment must not work
00:06:38.779 00:06:38.789 within the plastic deformation zone
00:06:40.459 00:06:40.469 under any circumstances after point a
00:06:44.420 00:06:44.430 the material has lost its initial
00:06:46.939 00:06:46.949 mechanical properties permanently
00:06:49.180 00:06:49.190 therefore the allowable stress is always
00:06:52.040 00:06:52.050 a percentage below the yield point this
00:06:56.149 00:06:56.159 percentage is a safety factor and it
00:06:58.700 00:06:58.710 defines the allowable stress the
00:07:01.730 00:07:01.740 allowable stress is established by the
00:07:03.800 00:07:03.810 design code for each case and it is
00:07:06.950 00:07:06.960 selected for a given material and the
00:07:09.019 00:07:09.029 design temperature unloyal stresses for
00:07:13.399 00:07:13.409 all accepted materials to be used in the
00:07:15.950 00:07:15.960 design of pressure vessels according to
00:07:17.869 00:07:17.879 section a division-one are found in
00:07:21.019 00:07:21.029 table 1 a of section 2 Part D of the
00:07:25.369 00:07:25.379 boiler and pressure vessel code this
00:07:29.029 00:07:29.039 video is just a quick overview of the
00:07:31.279 00:07:31.289 different contents you have to get
00:07:32.629 00:07:32.639 acquainted with you should check and
00:07:35.329 00:07:35.339 understand the different contents
00:07:36.740 00:07:36.750 mentioned in this video in the study
00:07:38.779 00:07:38.789 notes prior any development remember
00:07:42.140 00:07:42.150 that all concepts dealt with are
00:07:44.329 00:07:44.339 complimentary and that assignments are
00:07:46.579 00:07:46.589 linked
00:07:47.910 00:07:47.920 keep up with the woodwork and come back
00:07:49.920 00:07:49.930 for more thank you I have a great day

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