A fixed tube sheet heat exchanger is composed of tube sheets, shells, tube sheets, tubes, and other components. The overall structure is compact, with many tubes and a large area under the same diameter, making it relatively simple to manufacture. Its structural feature is that there is a tube bundle installed in the shell, with both ends of the tube bundle fixed to the tube plate through welding or expansion. The tube plates at both ends are directly welded to the shell, and the inlet and outlet pipes on the shell side are directly welded to the shell. The head flange of the outer edge of the tube plate is fastened with bolts, and the inlet and outlet pipes on the tube side are directly welded to the head. Several baffles are set inside the tube bundle according to the length of the heat exchange tube. The tube side of the heat exchanger can be divided into any number of channels through a diaphragm.
Fixed tube sheet heat exchangers have the advantages of simple structure, low manufacturing cost, convenient cleaning, multiple tube passes, double shell passes, and a wide range of specifications, and have been widely used in engineering. It is difficult to clean the shell side. Not suitable for dirty or corrosive media. If the expansion difference is large, we can install an expansion joint on the shell to reduce the thermal stress caused by the temperature difference on the shell side. It has the advantages of small bypass seepage, less use of forgings, low cost, no internal leakage, and a heat transfer product that is 20%~30% larger than that of floating head heat exchangers.
SCOPE OF WORK
Mechanical and Fabrication guarantee
Design including strength calculation (including erection condition) stress analysis and detail design based on applicable Codes, Local Regulation, Project Specifications and Standards
Thermal Design (Thermal Rating)
All technical certifications required for design work as per local regulations
Stability check (during transport, lifting and hydrostatic test) and loading data for base design
Structural analysis for main body and its support for operation load
Material procurement
Material Test and Certificates as per applicable Code and Specifications
Manufacturing
Post weld heat treatment as per code and specification
PMI (Positive Material Identification)
All NDEs as per Project Specification
Welding procedure qualification test
WPS & PQR
Welder performance test
Hydrostatic test at BlDDER shop as per Code & Local Regulations, Specifications.
Installation work for vessel internals supplied by Bidder
External surface preparation and painting as per Specification
Packing and marking as per project specifications
Preservation during transportation and storage (Including Seaworthy packing for oversea manufacturer)
Internal protection from moisture: N2 Charge
All activities to meet requirements of Data Sheets, Specifications, Codes and Standards, Local Regulations
Classification of uses of heat exchangers:
(1) Heater: The heater is used to heat the fluid to the desired temperature, and the heated fluid does not undergo phase change during the heating process.
(2) Preheater: Preheater is used for preheating fluids to improve the efficiency of the entire process unit.
(3) Superheater: Superheater is used to heat saturated steam to reach an overheated state.
(4) Evaporator: An evaporator is used to heat liquids and cause them to evaporate and vaporize.
(5) Reboiler: A reboiler is a specialized equipment used in the distillation process to heat and vaporize condensed liquids.
(6) Cooler: A cooler is used to cool the fluid to the desired temperature.
(7) Condenser: The condenser is used to condense saturated steam, allowing it to release latent heat and condense and liquefy.
1. Q:Are you a manufacturer or trading company?
A:We are a manufacturer with over thirty years of experience in China.
2.Q:Can we visit your factory before placing orders?
A: Sure, warmly welcome to our factory!
3.Q:What's the information needed if I send one inquiry ?
A : Please tell us the working conditions, mediums,temperature ,pressure, equipment ' s material,size,quantity, and other special requests.
4.Q:How does your factory do quality control?
A: Quality is priority ,we make relevant strict testing before delivery.
Our factory has already obtained ASME, GOST, ISO9001 quality and ISO 14001 Environmental management system certificate.
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