Application of Shell and Tube Heat Transfer:
These are typical Custom-built, Fabricated Equipmentpredominantly used in Refinery, Petro-Chemical, Fertilizer, and Power Generation Industries for Heat Transfer applications involving Heating, Cooling, Boiling & Evaporation, Condensation, etc., The fluids are of different types and properties as per the process & utility.
Design and Constructional Features
These are versatile equipment in various sizes, construction types, materials suitable for wide range of Heat Duties, Heat Transfer Areas, Temperature& Pressure. It has wide application from Cryogenic to High Temperature to more than 500°C with Pressures of Vacuum to more than 480 Bar.
Thermal Design and Rating of the Exchangers is in accordance with licensed HTRI-USA methods. Mechanical Designs are in accordance with International and National Codes and Standards such as ASME Section VIII Div 1&2, TEMA, API 660, IBR as well as to the specific project specifications.
Materials of construction include Carbon Steels, Low Alloy Steels, High Alloy Stainless Steels, Copper Alloys, Nickel Alloys, Brass, Titanium, etc. as per the fluid conditions handled in the Exchangers
The conventional and most predominantly used Shell & Tube Heat Exchanger is basically categorized as i) Fixed Tube Sheet Heat Exchangers, ii) U-Tube Heat Exchangers, iii) Floating Head Heat Exchangers.
TEMA Standard gives various types of constructions which are all well within the Design and Manufacturing scope of PECPL for the complete range of Pressure and Temperatures as well as the Fluid environment.
These Heat Exchangers have the following constructional features:
a) A cylindrical Shell acting as an envelope housing a Bundle of Tubes. It holds and routes the Shell side Fluid from inlet to outlet at a given Temperature, Pressure, and Flow rate over the Bundle of Tubes.
b) A Tube bundle consisting of Number of Tubes through which Tube side Fluid flows from the inlet to outlet at given Temperature, Pressure, and Flow rate. It has Transverse, Segmental Plate Baffles through which the Tubes are passed holding them as supports as well as routing the Shell side fluid across and along with the Bundle from inlet to outlet of Shell. The baffles also prevent Flow-induced Vibration of Tubes caused by the alternate motion of Shell side Fluid across the Tube Bundle. The Tubes are generally Plain, either Straight or U-Type, however, they can be of Low Fin Type, Coated Type, Fluted Type based on process conditions.
c) Front and Rear End Closures and Bonnets, usually called Inlet and or Outlet Channels to receive tube side Fluid and pass it through the tubes from one end to the other.
d) Required Heat Transfer being achieved between the Shell Side and Tube side fluids across the Tube Wall without intermixing.
Variations in the Type of Tubes and Type of Baffles are made to suit different Heat Transfer conditions. These variations lead to special-purpose units.
These custom-built Shell and Tube Heat Exchangers are regularly Designed and Manufactured at PECPL in all ranges as the Main Product for various plants such as Oil & Gas, Chemical & Fertilizers, Power, LNG, etc. catering for National, International Clients, and Projects.
The Design & Engineering Department of PECPL is well equipped of qualified Engineers and Technical Staff with Thermal & Mechanical Design Capabilities of these Heat Exchangers.
PECPL possesses all necessary Design and Engineering Software as well as in-house calculation methods for the Design & Detailed Engineering of these Exchangers.
PECPL is a member of HTRI-USA and possesses HTRI programs for Thermal Design and Rating of these exchangers.
PECPL is an approved Fabrication facility with authorization for ASME Stamping of the Exchangers as well as authorized to manufacture according to Statutory Regulations to Indian Boiler Regulations (IBR) and other international regulations as well.
PECPL Has Full-Fledged Fabrication and Testing facilities to manufacture all constructional types of Shell & Tube Heat Exchangers in a wide range of sizes and materials of Construction under reputed Quality Surveillance such as LLODS, BV, TUV, etc.
When required an external partnership of repute is taken for special construction, especially for High Pressure with Special Closures as well as for Special Process applications such as LNG, etc.