Shell & Tube Heat Exchangers

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2 Shell & Tube Heat Exchangers Shell & Tube Heat Exchangers With over 20 year s experience, Dolphin Heat Transfer is fully equipped to Design & Manufacture Shell & Tube Heat Exchangers in accordance with ASME Sec VIII Div. I & TEMA & with ASME U STAMP. State-of-the-Art Manufacturing Facilities include CNC Drilling Machine for Tube Sheet & Baffle Drilling, Column & Boom Submerged Arc Welding Machine, CNC Orbital Welding Machine, Strip Cladding Machine and SMAW/GTAW Welding Machines. Handling facility is provided by a 25 ton capacity overhead EOT Crane. WE ALSO EXECUTE RETUBING JOBS WITH R STAMPING. Thermal & Mechanical design is carried out on latest soft wares like HTRI & PV ELITE. Heat Exchangers can be manufactured in various materials including Carbon & Alloy Steels, Stainless Steels, Nickel Alloys, Copper Alloys and Titanium.

3 Tube Finning Machine We manufacture finned tube in house on the latest Mc ELROY MARK IV & V FINNING MACHINE. Manufacturing Range: Base Tube OD: 5/8 TO 1 ¼ Fin Height: 7/16 (11.11mm) to ¾ (19.05mm) Fin Pitch: 9-11 Fin Thickness: 0.35mm to 0.45mm Base Tube Material: Any Fine Material: AI, Cu & Steel Air Cooled Heat Exchangers Air Cooled Heat Exchangers Dolphin carries out thermal & Mechanical Design & Manufacture of Air Cooled Heat Exchangers as per API 661 & ASME Sec VIII Div. I. Complete units can be supplied with Tube Bundles, Frames, Fans, Structure, Platforms and Automation. We have in-house finned tube manufacturing and carry large stocks of Tubes & Fin Strips. Thus very short lead time projects can be done quickly in house. Dolphin offers Forced Draft as well as induced Draft type Air Coolers with Plug Type, Cover Plate Type & Manifold Type Headers.

4 G Fin (Embedded Fin) L Fin (Wrap on Fin) G Fin (Embedded Fin) The fin strip is wound into a machined groove and securely locked into place by back filling with base tube material. This ensures that maximum heat transfer is maintained at high tube metal temperatures. Maximum operating temperature for this fin type is 450 c. L Fin (Wrap on Fin) The strip material is subjected to controlled deformation under tension giving the optimum contact pressure of the foot of the fin considerably enhances the corrosion protection of the base tube. Maximum operating temperature for this fin type is 150 c. Finned Tubes KL Fin Extruded High Fin KL Fin Manufacture exactly as the L except that the base tube is knurled before application of the fin foot. After application the fin foot is knurled into the corresponding knurling on the base tube thereby enhancing the bond between the fin and tube resulting in improved heat transfer characteristics. Maximum operating temperature for this fin type is 260 c. Extruded High Fin This fin type is formed from a bi-metallic tube consisting of an aluminum outer tube and an inner tube of almost any material. The fin is formed by rolling material from the outside of the exterior tube to give an integral fin with excellent heat transfer properties and longevity. Extruded fin offers excellent corrosion protection of the base tube. Maximum operating temperature for this fin type is 280 c.

5 25 Tons Capacity Overhead EOT Crane Tube Finning Machine CNC Plasma Cutting Machine Column & Boom Submerged ARC Welding Machine CNC Drilling & Milling Machine (12.5mtr X 6mtr ) Orbital Welding Machine for Tube to Tube Sheet Welding Facilities Quality Assurance Dolphin Heat Transfer has been audited for compliance and is authorized to use the ASME U & S Stamps & The National Board R Stamps for Design, Manufacture & Repair of Heat Exchangers, Pressure Vessels & other Pressure Retaining items constructed in accordance with the rules of ASME Boiler & Pressure Vessel Code. Equipments are also manufactured under third party inspection by M/s. Lioyds Register, Bureau Veritas etc. Non-destructive testing is performed as per code requirements including Radiography, Ultrasonic Testing, Magnetic Particle Testing, Hardness Testing & Liquid Penetrant Testing. Post Weld Heat Treatment as required by the Code is also carried out. Dolphin believes in not only meeting but exceeding Code & Client requirements while completing the projects on schedule at competitive process.

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