How to Choose a Heat Exchanger for Industrial Applications
A practical buyer's guide covering operating conditions, construction type, materials and the trade-offs that drive heat exchanger selection.
Start from the duty, not the catalogue
Heat exchanger selection begins with the operating conditions: hot- and cold-side medium, inlet and outlet temperatures, flow rate, allowable pressure drop, design pressure and design temperature. These six parameters define the thermal duty and bound the construction options. Selecting from a catalogue first — and forcing the duty into a frame size — almost always leads to over-designed or under-performing units.
Choosing a construction type
Plate heat exchangers offer high efficiency, compact footprint and serviceable gaskets — ideal for clean liquid-to-liquid duties below ~25 bar and ~180 °C. Shell-and-tube units handle higher pressures and temperatures, broader fluid ranges and fouling services. Brazed and welded plate constructions remove gaskets for refrigerants and aggressive media. Spiral and four-side detachable designs are chosen when fouling or maintenance access dominate.
Materials and corrosion
Stainless 316L is the default plate material; switch to 254 SMO, titanium or nickel alloys when chlorides, seawater or aggressive chemistries are present. Tube material choices follow the same logic, with carbon steel acceptable for clean utility services.
Codes and certification
Confirm the design code (ASME, PED, GB) and any third-party inspection requirement at the inquiry stage. Material certificates, pressure test reports and dimensional inspection records should be specified in the purchase order.
Working with a manufacturer
Provide a datasheet or P&ID where available. If only process conditions are known, an engineering-based selection from the manufacturer is usually faster than searching catalogues. At Jiangxing, our engineering team returns a thermal selection and indicative pricing within one to two business days for most enquiries.
Frequently asked questions
What is the most important factor when choosing a heat exchanger?
The operating duty — medium, inlet/outlet temperatures, flow rate and pressure on each side. These define the thermal load and bound the construction and material options, so always start from the duty, not from a catalogue size.
Should I choose a plate or a shell-and-tube heat exchanger?
Choose plate units for clean liquid-to-liquid duties below roughly 25 bar and 180 °C where efficiency and footprint matter. Choose shell-and-tube for high pressure, high temperature, fouling services or a broad fluid range.
How quickly can I get a selection?
Send the process conditions to a manufacturer and an engineering-based selection is usually faster than searching catalogues. Jiangxing returns a thermal selection and indicative pricing within one to two business days.
Send your working conditions to Evan
Share your medium, temperatures, flow rate and pressure — Evan will return a thermal selection and indicative pricing after reviewing the available data.