Pressure Parts Engg. Co.

INDIAN OIL CORPORATION LTD
1 ATMOSPHERIC UNIT. 1 COLUMN MAX. 5.0 M. DIA & 50 M HEIGHT
2 FLUID CRACKING UNIT. 2 HEAT EXCHANGER MAX. 3000 TUBE.
3 GUJARAT HYDROCRACKER PLANT. 3 VESSELS 5.0 M. DIA & 20 M HEIGHT.
4 SULPHUR RECOVERY UNIT. 4 HEATERS 15 M. DIA & 30 M HEIGHT.
5 CRUDE DISTILLATION UNIT.
6 VACCUM DISTILLATION UNIT.
7 VIS BRACKER UNIT.
INDIAN PETROCHEMICAL CORPORATION LTD
1 GUJARAT OLEFIN PLANT. 1 COLUMN MAX. 5.0 M. DIA & 60 M HEIGHT
2 GUJARAT AROMATIC PLANT. 2 HEAT EXCHANGER MAX. 3000 TUBE.
3 LIQUID ALKLYENE BENZENE. 3 VESSELS 5.0 M. DIA & 20 M HEIGHT.
4 ETHYLYNE GLYCOL. 4 HEATERS 15 M. DIA & 30 M HEIGHT.
5 ACRYLIC FIBRE. 5 CATALYST LOADING/UNLOADING IN OXY CHLORINATION REACTOR.
6 ACN / ACR. 6 CATALYST LOADING IN ETHYLENE OXIDE REACTOR.
7 VC / PVC.
OIL AND NATURAL GAS COMMISION LTD
1 PHASE I (GAS SWEETENING UNIT, DPD). 1 COLUMN MAX. 5.0 M. DIA & 70 M HEIGHT
2 PHASE II (GAS SWEETENING UNIT, DPD). 2 HEAT EXCHANGER MAX. 3000 TUBE.
3 LIQUID PETROLEUM GAS UNIT. 3 VESSELS 5.0 M. DIA & 20 M HEIGHT.
4 SULPHUR RECOVERY UNIT. 4 HEATERS 15 M. DIA & 30 M HEIGHT.
FINOLEX INDUSTRIES LTD
1 VC / PVC UNIT. 1 COLUMN MAX. 5.0 M. DIA & 70 M HEIGHT
2 HEAT EXCHANGER MAX. 3000 TUBE.
3 VESSELS 5.0 M. DIA & 20 M HEIGHT.
4 HEATERS 15 M. DIA & 30 M HEIGHT.
NIRMA LIMITED
1 LAB PLANT. 1 COLUMN MAX. 5.0 M. DIA & 50 M HEIGHT
2 HEAT EXCHANGER MAX. 3000 TUBE.
3 VESSELS 5.0 M. DIA & 20 M HEIGHT.
4 HEATERS 15 M. DIA & 30 M HEIGHT.
5 CATALYST LOADING UNLOADING IN VARIOUS REACTORS
RELIANCE INDUSTRIES LIMITED
1 CRUDE UNIT – I. 1 COLUMN MAX. 5.0 M. DIA & 80 M HEIGHT
2 AROMATIC UNIT. 2 HEAT EXCHANGER MAX. 3000 TUBE.
3 FLUID CRACKING UNIT. 3 VESSELS 5.0 M. DIA & 20 M HEIGHT.
4 HEATERS 15 M. DIA & 30 M HEIGHT.




Weekly Updated Mechanical Knowledge Blog



Heat Exchangers and Finned tubes

Finned pipe and tubes are used within shell and tube type heat exchangers to enhance the heat transfer between the inside of the heat exchanger tube or pipe, and the outside. Finned pipes and tubes are commercially available in various sizes and materials. Custom finned tubes and pipes are also available.

Finned Pipe / Tube Design Considerations:

To be able to transfer heat well, the finned tube or pipe material must have adequate thermal conductivity . Heat energy transfer is increased by the effective fin area on the tube or pipe. The heat exchanger tube material will thermally expand differently at various temperatures, therefore, thermal stresses will be present along the heat exchanger. Additionally, stress will be induced by any high pressures from the applicable fluids. The tube and fin material should be galvanically compatible with all heat exchanger components and fluids for extended service periods under all operating conditions (temperatures, pressures, pH , etc.) . These requirements require careful selection of material which is : strong, thermally-conductive, and corrosion-resistant .

The fin effectiveness in transferring a given quantity of heat is defined by:

Fin efficiency = (Actual Heat Transferred) / (Heat which would be transferred in entire fin area were at base temperature)

Conditions when fins do not help:

Finned tubes / pipes in selected installation will not help thermal transfer. If the convection coeffiecint is large, as it will be with high velocity fluids or boiling liquids, the fins may produce a reduction in heat transfer. This due to the fact that the conduction resistance then represents a larger impediment to the heat flow than the convection resistance.