Heat transfer is very wide field and we cover most of the area like: Heating / Cooling / Chilling / Condensing etc.
This also covers heat recovery system, which is the part of energy conservation.
Equipment use in the purpose is typically Shell and Tube heat exchangers, Fin Tube heat exchanger, Corrugated Tube heat exchanger, Coiled Heaters, Direct Fired Heater, or Electrical Heater.
A shell and tube heat exchanger is a class of heat exchanger designs.
It is the most common type of heat exchanger in oil refineries and other large chemical processes, and is suited for higher-pressure applications.
As its name implies, this type of heat exchanger consists of a shell (a large pressure vessel) with a bundle of tubes inside it. One fluid runs through the tubes, and another fluid flows over the tubes (through the shell) to transfer heat between the two fluids.
The set of tubes is called a tube bundle, and may be composed by several types of tubes: plain, longitudinally finned, Corrugated etc.
Design of Shell & Tube heat exchanger is as per TEMA & ASME.
Material of Construction: Carbon Steel, Stainless Steel, Copper and its alloys and other Alloy Steels.
We deserve the capacity to decide perfect application of different type of heat exchanger like fixed tube-sheet, Floating tubes sheet, ‘U’ tube sheet or externally packed type.
Tube Area: 0.5 m2 to 100 m2
MoC: SS 316, SS 304, SA 336 / SA 387 with T22 grade tubes
Tube Type: Bare Tubes, High Fin Tubes, Low Fin Tubes
Tube Sizes: ½” to 1” OD (12g to 16g)
M/s RCF Limited (Thal, Alibag):
Special Mentions:
- Re-tubing of ~100 m2 HE: Involves removal of existing tubes and inserting new ones.
MoC:
- Tube: SA 213 T22
- Tubesheet: SA 336 F22 Cl. 1
- Shell: SA 387 F22 Cl. 2
Weight: ~7 tons
Hydro test Pressure: 42 kg/cm2 (g)
We have till date successfully completed the work of 3 sets of Heat exchangers.
Job on one of the Heat Exchangers also involved replacing one of Tubesheets and also replacing the Baffles & Tie Rods.
It has to be specially mentioned that, during the actual operations the HE is subjected to conditions wherein the tubes become harder & brittle and therefore crack.
This also makes their removal most difficult as compared to removing a stainless steel tube. The tubes tend to break on application of force while removal, making the job critical and complicated.
These jobs have been completed under 3rd Party Inspection of M/s TUV SUD.
- Tube-Tubesheet Welding Contract (On-Site – Thal, Alibag):
MoC: SS 304L (Tube / Tubesheet)
Tube Size: ¾” OD
Tube Qty: 3684 Nos
Successful completion of the contract, involved only welding of Tube-Tubesheet joints.
Total Joints: 7300+, 2 Welding runs each, Pitch less than the standard practice of 1.25 times Tube OD, making the welding complicated.
Completion Time: <6 weeks
We would like to proudly mention that we have been a preferred vendor for jobs with critical welding work involved, especially Tube-Tubesheet joints.
M/s Mallak Specialities Limited:
Special Mentions:
- Designed and Fabricated HE, Explosion Proof: 60 bar
M/s Zydus Takeda Healthcare Private Limited:
Special Mentions:
- Low Fin tubes: Corrugation Depth and Pitch as per Client requirements