Stainless steel heat exchanger

Product Overview

Shell-and-tube heat exchangers are primarily composed of a shell, baffles, heat exchange tubes, flanges, and turning vanes. They can be manufactured using either carbon steel or stainless steel. During the heat exchange process, one fluid enters through the connection pipe at the head and flows through the tubes, exiting through the outlet pipe at the other end of the head, which is referred to as the tube side; another fluid enters through the inlet of the shell and exits through another outlet on the shell, known as the shell side.

Fixed-tube sheet heat exchanger

The structure is simple, compact, and cost-effective, but it cannot be mechanically cleaned on the outside. The tube bundle of this heat exchanger is connected to the tube sheet, which is welded to the ends of the shell. A top cover is connected to it, and the top cover and shell are equipped with fluid inlet and outlet connections. Typically, a series of baffles perpendicular to the tube bundle are installed outside. The connections between the steel pipes, tube sheets, and the shell are rigid, while the fluids inside and outside the tubes are at different temperatures. Therefore, when there is a significant temperature difference between the tube wall and the shell wall, a large temperature difference stress is generated due to the different thermal expansions of the two, which can cause the tubes to twist, bend, or even loosen from the tube sheets, potentially damaging the heat exchanger. Generally, a temperature difference compensation device should be provided for the heat exchanger when the temperature difference between the tube wall and the shell wall exceeds 50°C for safety reasons. However, the compensation device (expansion joint) can only be used when the temperature difference between the shell wall and the tube wall is below 60 ~ 70°C and the shell-side fluid pressure is not high. Typically, when the shell-side pressure exceeds 0.6MPa, due to the excessive thickness of the expansion joint, it is difficult to expand and contract, losing its temperature difference compensation function, other structural considerations should be made.

U-tube heat exchanger

U-shaped tube heat exchanger, each tube bent into a U-shape, fixed at both ends on the same tube sheet, allowing each tube to expand and contract freely for thermal compensation. The tube side has at least two passes, the tube bundle can be removed for cleaning, and the tubes can expand freely. It features a simple structure, light weight, and is suitable for high temperature and high pressure conditions.

Immersion Snake Tube Heat Exchanger

A heat exchanger using a serpentine tube as the heat transfer element is one type of a shell and tube heat exchanger. It features a simple structure, ease of manufacturing, installation, cleaning, and maintenance, affordability, and is particularly suitable for cooling high-pressure fluids, thus it remains in use.

Technical Specifications