Shell and Tube Heat Exchanger

Heat Exchanger

Jet Flow Technologies not only designs but also manufactures shell and tube heat exchangers for effective heat transfer between two fluids, with one fluid flowing through a bundle of tubes (tube side) and the other circulating around them within an outer shell (shell side). As an expert tube heat exchanger manufacturer, we offer fixed tube sheet, floating head, U-tube, double pipe, and kettle type exchangers for demanding industrial applications across India, Europe, the Middle East, and Southeast Asia. All our units are engineered in compliance with ASME, TEMA, PED, and other international pressure vessel standards to ensure consistent performance in vital processes.

Principle - A heat exchanger is a device built for efficient heat transfer from one medium to another, whether the media are separated by a solid wall so that they never mix, or the media are in direct contact.

How a Shell and Tube Heat Exchanger Works

• Tube-Side Flow In a tube heat exchanger, one fluid flows through a bundle of tubes, carrying heat from or to the process fluid.
• Shell-Side Flow - The second fluid flows around the tubes within the outer shell, enabling continuous heat exchange between the two media.
• Heat Transfer Mechanism - Heat passes through the tube walls without the two fluids mixing, ensuring safe and efficient thermal exchange.
• Baffle Function - Baffles inside the shell direct the fluid flow across the tubes, increasing turbulence and improving heat transfer efficiency.

Design and Manufacturing consideration during Manufacturing of Heat Exchanger

• Tube to Tube - sheet joint

Tube to Tube Sheet Joint -Tube to tube sheet joint has the single objective of sealing against inter leakage between tube side and shell side fluids. The type of tube-to-tubesheet joint to be employed is thus largely dictated by the anticipated difficulty in providing a reliable seal. Factors which influence the evaluation of the difficulty of providing a reliable seal at the tube-to-tube sheet joint include the following

Tube to Tube Sheet Joint

• Leak characteristics of either the tube side or shell side fluids. hydrogen and Dowthern 'A, are typical of two fluids with high leak characteristics.
• Differential pressure across the tube-to-tube sheet joint.
• Operating temperature to which the tube-to-tube sheet joint will be subjected.
• Relative hazard of inter leakage between the tube side and shell side fluids.
• Frequency and magnitude of cyclic service to which the tube to tube sheet joint will be subjected.
• Corrosion characteristics and erosive tendency of the tube side fluid.
• The metallurgy of the tube and tube sheets.
• Industry preference such as utility, refinery, chemical, petrochemical etc.
• Differential pressure stress as determined by the difference in operating pressure between tube side and shell side fluids.
• Axial stresses which may be the result of tension or compression of the tubes. Differential thermal expansion between shell and tubes or between tube passes will develop the axial stress. Similarly tube side pressure will tend to pull the tubes out of tube shell.
• Differential diametric thermal expansion between the tubes and tube sheet.
• Differential axial thermal expansion between the tube and the tube sheet with certain tube to tube sheet joint construction.
• The above briefly summerises factors which influence the selection of a tube to tube sheet joint and stress to which such joint is subjected. The tube to tube sheet joint should be tight against leakage and should have mechanical strength to resist tubes being pulled or pushed out of a tube sheet.

Electrical Tube Expander -

• Uniform Expansion
• Maximum safe guard to Tube Sheet result to no increase in Diameter or distortion of plate
• Reduced corrosion hazards
• Tube elongation reduced to minimum
• Improved quality of expansion process.