The specification selection of a shell-and-tube heat exchanger is usually based on three parameters: heat transfer area, design pressure, and medium flow velocity. The KSH-130 is designed with a nominal heat transfer area of 130 square meters; the shell material can be carbon steel or stainless steel, and the design pressures of the tube side and shell side can be configured according to the user's system conditions. It is suitable for conventional heat exchange duties such as steam-to-water and water-to-water. When comparing similar solutions, procurement personnel can focus on checking three indicators.
When similar products have comparable nominal areas, the actual available area is affected by tube bundle layout and fouling factor. For the KSH-130, after calculating the required area based on the system heat load, a safety margin of 10%–20% is reserved, which can reduce the risk of outlet temperature failing to meet requirements due to insufficient area in cases with small temperature differences; if on-site space is limited, pressure drop and area need to be evaluated together to avoid simply increasing the area, which may lead to lower flow velocity and a higher tendency for fouling.
A carbon steel shell is suitable for general circulating water and steam media, while a stainless steel tube bundle is more targeted for media containing chloride ions or weakly corrosive media. The tube-side flow velocity is recommended to be controlled within the range of 1–2.5 m/s; too low a velocity easily causes deposition, while too high a velocity increases pressure drop and wear. Compared with plate heat exchangers, shell-and-tube heat exchangers have longer maintenance intervals under high-pressure, high-temperature, and particle-containing medium conditions. The inspection method is mainly withdrawing the tube bundle, which imposes certain requirements on on-site lifting space.
When ordering, it is recommended to specify the medium name and concentration, inlet and outlet temperatures, design pressure and temperature, nozzle diameter and orientation, and whether an expansion joint is required. The accompanying documents should include material certificates, pressure test records, and tube bundle layout drawings to facilitate later operation and maintenance comparison.
