Heat exchanger tube plug calculation
The Heat Exchanger Inspection article provides you with information about the inspection of the heat exchanger and heat exchanger testing during the manufacturing phase, as well as in-service inspection in operating units.
You may want to review shell and tube heat exchanger inspection procedure and related inspection and test plan. The construction code for shell and tube heat exchangers is ASME Code Section VIII, and it covers the minimum requirements for design, materials, fabrication, inspection, testing, and preparation for initial delivery.
The heat exchanger still is a pressure vessel and all requirements for ASME pressure vessel does apply for heat exchanger as well.Shell tube HX eNTU calc ho
We are going to avoid to repeat those requirements for the heat exchanger. You may review pressure vessel inspection article for those requirements. There are several inspection requirements that only apply to the heat exchanger and not regular pressure vessel:.
Tube Inspection - The tube outside diameter, inside diameter, thickness, and ovality shall be checked before the building of the tube bundle. You have to use your caliper, machinist ruler, etc.
Tube Bundle Inspection - The bundle dimension shall be checked based on the approved drawing. The baffle diameter and distance between them shall be controlled and meet the acceptance tolerances in the drawing. The tightness of stay bolts and spacers must be controlled.
The shell cleanliness needs to be verified and make sure the inside welds are complete and are ground as per drawing requirements.
Tubesheet Inspection - The Tubesheet shall be inspected before welding to the shell. The hole diameter, grooves dimensions, drilling pattern, the thickness of the tubesheet and surface finish shall be measured and checked aginst acceptance tolerances in the approved drawing.
Tube Rolling Inspection - The tube rolling shall be checked based on customer specification. The wall reduction after rolling and depth of roll shall be measured and shall meet the customer specification. Leak Testing of Seal Weld Tube to Tubesheet - if seal welding considered, then the leak test will be a mandatory requirement. The shell side will be subjected to the air pressure, and water and soap solution will be sprayed to the tubesheet to make sure all seal welds are defect free. The bubble will be developed if there was any welding defect such as crack, pinhole, etc.
Shell side Hydrostatic Testing - After manufacturing completion, the heat exchange shell side will be subjected to the hydrostatic testing.
The test pressure amount shall be consistent with the value indicated in the approved drawing. The holding time shall be based on the supplier approved test procedure. The pressure gages calibration and range shall be controlled.Plug leaky internal tubes in heat exchangers with these two-piece ring and pin sets.
Insert the ring into the tube and hammer the pin into the ring for a secure seal. Also known as sacrificial anodes, these rods and pads protect tanks, water heaters, and heat exchangers from rusting by attracting corrosion that would otherwise damage equipment.
Rods have a steel core covered with zinc or magnesium. They have a threaded pipe connection.
MECHANICAL DESIGN OF HEAT EXCHANGERS
Zinc rods protect against corrosion and scaling in salt water and fresh water. Magnesium rods protect against corrosion in fresh water. Contact Us Order. Log in.
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Please enter an email and password or contact us. Please enter a valid email address or contact us. Search Results. For Use With. Pipe Size. Ring OD. For Tube Wall Thickness. For Tube OD. Minimum Temperature. Maximum Temperature. View catalog pages 2.Log In. Thank you for helping keep Eng-Tips Forums free from inappropriate posts. The Eng-Tips staff will check this out and take appropriate action. Click Here to join Eng-Tips and talk with other members! Already a Member? Join your peers on the Internet's largest technical engineering professional community.
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Join Eng-Tips Forums! Join Us! By joining you are opting in to receive e-mail. Promoting, selling, recruiting, coursework and thesis posting is forbidden. Students Click Here. Related Projects. Hi, I would like to gather information about factors to consider when plugging the HX tube.
What are the factors that I should considered? Please give more information about your application; tubesheet material, tube material, service e. Some fancy explosive applications, some rammed up the end of the tube, some welded, etc. However, the plugging is not a simple issue, you need to understand that the plug could fail also and you must take that in account.
The reply from rmw tried to point you towards the need for you to understand ALL of the issues associated with plugging a HEX tube. Do you have a full understanding of why did fail the tube joint first place? One tube leak might herald the catastrophic failure of the whole equipment, hence rmw needs to make sure he's asking all the relevant questions and you answer to all of them, before committing to an answer suited to your problem.Remember Me?
Results 1 to 6 of 6. Join Date Dec Posts 8. See More: heat exchanger tube plugging. My threads; mehdipoor :. Spons Circuit. Join Date Always Posts Many. Join Date Jul Posts My threads; viswanathankasi2 :. Sponsored Links. Join Date Mar Posts 9. Well there is no hard and fast rule for the design of tubes plug. Being a maintenance engineer i know few things about it; 1. Length of Plug length is usually 38mm. Taper in plug is 5 degree. Minor Dia of plug is less than ID of tube.
Plug material is same as of Tube material. In case of s during welding of plug with tubesheeet, a hole is drilled on plug's major dia side at its centre to cater expansion effect. Such type of plugs are known as Johnsons Plug.
My threads; AAQE :. It is to give the plug required elasticity against thermal stresses. Best regards. My threads; Nasir :. Thanx Nasir for adding such a conducive information. Replies: 6 Last Post:AM. Replies: 3 Last Post:AM.
Tube Stress for heat exchanger. By morest in forum Pipeline And Fluid Flow. Replies: 10 Last Post:PM. Replies: 0 Last Post:PM. Replies: 1 Last Post:PM. Bookmarks Bookmarks Digg del. The time now is PM. All rights reserved.Types of Industrial Heat Exchangers There are many types of heat exchangers used in a wide variety of industrial applications including power plants, boilers for industrial steam, chemical plants, and many types of manufacturing facilities.
Several different configurations are used to accomplish the basic function of transferring heat from one fluid to another without mixing the two fluids together. The types of heat exchangers described and discussed in these articles include the two most common industrial heat exchangers, the shell and tube heat exchanger and the double pipe heat exchanger, along with information about spiral heat exchangers, flat plate heat exchangers, fin-tube heat exchangers, and condensers.
Heat Transfer Coefficients and Heat Transfer Fundamentals Convection heat transfer coefficients and log mean temperature differences are needed for heat exchanger design calculations.
Natural convection heat transfer coefficients are calculated using a correlation of dimensionless numbers, typically Nusselt number in terms of Grashof number and Prandtl number. Forced Convection heat transfer coefficients are calculated from correlations of Nusselt number in terms of Reynolds number and Prandtl number. These articles provide information, equations and example calculations for natural convection and forced convection heat transfer coefficients, overall heat transfer coefficients and log mean temperature differences.
There is also information about heat exchanger flow patterns and equations and calculations for combined convection and conduction heat transfer. A preliminary value for the required heat transfer area can be calculated using an estimate of the overall heat transfer coefficient together with information about the required rate of heat transfer, the flow rates of the two fluids, and the inlet and outlet fluid temperatures.
Preliminary details of the heat exchanger can then be calculated, including items such as diameter, length, and number of tubes for a shell and tube heat exchanger, diameter and length of the shell, number of tubeside passes, and number of shellside passes.
The allowable pressure drop across the heat exchanger can also be calculated and used in the preliminary design. With a preliminary detailed design completed, a better estimate of convective heat transfer coefficients and the overall heat transfer coefficient can be made and adjustments can then be made to the preliminary detailed design as necessary. The use of Excel spreadsheets for the preliminary design calculations is included in some of these articles.
Heat Exchangers on Ships Heat exchangers are used on ships in the power production process, such as for diesel engines, boilers, and economizers, as well as in production of steam for accommodation and deck equipment. The heat exchangers used include common types used as industrial heat exchangers, such as the shell and tube heat exchanger, the plate heat exchanger, and the fin tube radiator type.
Heat Exchangers in Everyday Life Although most people are not aware of them, heat exchangers are very prevalent all around us in our everyday life. For example, heat exchangers are crucial to operation of furnaces, air conditioning systems, refrigerators and freezers. Automobiles require a heat exchanger in the form of the radiator to provide cooling for the engine and a smaller one for heating of the passenger cabin.
High performance engines use heat exchangers in turbochargers. It is available in rigid and flexible forms and can […]. It is used for water distribution, fire protection, oil, HVAC, […]. Your Name required. Your Email required. Your Message. Your Tel.
Shell & tube heat exchanger equations
Call Us Today! Heat Exchanger Theory, Calculations, and Design. Popular Recent. Choosing the Right Tubing Material April 12th, Copper Tube April 12th, No comments have been published yet.This gives even expansion to the ring and a long contact to the seal. There have been many variations of the tube plug over the years in an effort to achieve maximum sealing area and to control the method in which it is installed. While each of these plugs are still commonly used today, they were designed to overcome various challenges operators have had over the years.
Selecting The Correct Tube Plug Material Not having a compatible tube plug material can result in leaks, costing hundreds of thousands of dollars or more in lost production and revenue. When it comes to selecting a tube plug, there are a variety of options and factors to consider: application, material, and the ID of the tube.
The three main types of tube plugs offered are one-piece, two-piece, and mechanical. One of the most overlooked best practices for plugging a tube is to vent the tube beforehand.
Tube venting is a process by which a small puncture is made inside of the tube, releasing any pressure or chemicals that may be trapped inside. While mechanical tube plugs are strong enough to remain inside of tubes for long periods of time, in cases where they are going to be removed it is important to follow these three tips and tricks. One-Piece Tube Plugs. Tube Size: 0. Learn More. Two-Piece Tube Plugs. Materials: Brass, Steel, Stainless, Titanium, and more. Comprehensive Testing and Quality Assurance Standards.
Erica Bray T The Evolution Of The Tube Plug There have been many variations of the tube plug over the years in an effort to achieve maximum sealing area and to control the method in which it is installed. Erica Bray T How To Remove An ETT Mechanical Tube Plug While mechanical tube plugs are strong enough to remain inside of tubes for long periods of time, in cases where they are going to be removed it is important to follow these three tips and tricks.
Contact us for more information or to request a quote.Shell and tube heat exchangers are very popular and commonly used heat transfer equipment in the process industry. This type of heat exchangers consists of metal tubes passing through another metal enclosure, which is referred to as the 'shell'. There are many subtypes of shell and tube exchangers created by different configurations of the shell and tube arrangement. This versatility is one of the reasons why shell and tube exchangers are so popular among process design engineers.
To determine these design parameters, a few calculations must be performed for the shell and tube heat exchanger. In each iteration you need to calculate how the exchanger performs. Following calculators can help you with these heat exchanger sizing calculations.
Note all of the following calculators are for demo. To access the actual working calculators, you will need to create a login on EnggCyclopedia. Apart from these calculators, you can always use a heat exchanger design software to build a model of your heat exchanger design and then to simulate its performance.
Sundyne pumps deliver partial optimum efficiency at high head, low flow. For a given speed and diameter, the open radial vane impeller generates a higher head Pipe pigs are used for performing following types of tasks 1. Cleaning of pipeline and displacement of sludge 2. Separation between batches of different Based on two basic types of circulation commonly used, high pressure HP steam producing boilers can be classified as: - Natural or thermal circulation Figure 1 - Entrained flow gasifier and variation of the temperature of coal and gas along passage through gasifier.
Next the effective area for the crossflow across tubes between baffles is calculated using following Sign up for free if you are not a member already. Share This! You may also like. Process Equipment Boiler circulation systems: natural circulation and forced circulation. Figure 1 - Entrained flow gasifier and variation of the temperature of coal and gas along passage through gasifier Companies working in the field of Login Username or Email:.
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