Fusion-Welded Heat Exchanger

Fusion-Welded Heat Exchanger
Fusion-welded plate heat exchangers are high-efficiency, compact heat transfer equipment that uses fusion welding instead of gaskets to achieve all-metal sealing. They are mainly used in severe working conditions requiring high temperature, high pressure, strong corrosion resistance and zero leakage.

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Product Description

Fusion-Welded Heat Exchanger

Fusion-welded plate heat exchangers are high-efficiency, compact heat transfer equipment that uses fusion welding instead of gaskets to achieve all-metal sealing. They are mainly used in severe working conditions requiring high temperature, high pressure, strong corrosion resistance and zero leakage.

Core Principle & Structure

Process Definition
Edge and contact points of corrugated metal plates (usually 316L stainless steel, titanium, Hastelloy, etc.) are permanently welded by laser autogenous welding, argon arc welding or patented fusion technology, forming alternating hot and cold fluid channels without any rubber gaskets.
Heat is efficiently transferred through the metal wall while the corrugations enhance turbulence.
Structure Composition
The core is a welded plate pack (non-detachable), matched with end plates, inlet/outlet flanges and supports. Single-pass or multi-pass configurations are available, and some high-end models adopt double-wall plates to prevent cross-contamination.

Key Technical Advantages

Zero leakage & wide temperature-pressure range
Completely eliminates gasket aging and softening leakage. Withstands temperatures up to 550°C, pressures up to 10 MPa, and low temperatures down to -196°C (for LNG applications).
High efficiency & compactness
Heat transfer area per unit volume is 2–5 times that of shell-and-tube exchangers, with high heat transfer coefficient and 60%–80% smaller footprint.
Strong corrosion resistance
All-stainless steel / special alloy materials, avoiding copper or nickel pollution, suitable for drinking water, food, pharmaceutical and strong acid-alkali media.
Low maintenance
No gasket replacement, stable long-term operation, significantly longer service life than gasketed types.

Typical Applications

Petrochemical Industry: Syngas cooling, sulfuric acid/hydrochloric acid recovery, hydrogenation units, offshore natural gas processing.
Energy & Power: LNG regasification, boiler feedwater preheating, nuclear power emergency cooling.
Food & Pharmaceutical: Clean steam heating, sterile liquid cooling, FDA-compliant hygienic applications.
District Heating & Cooling: High-temperature hot water networks, industrial waste heat recovery.
Water Treatment: Seawater desalination, high-pressure RO concentrate energy recovery, chlorinated wastewater cooling.

Comparison with Other Heat Exchangers

表格

Type	Sealing Method	Temperature & Pressure	Maintenance	Application
Fusion-welded plate	All-welded, no gasket	Very high (up to 550°C / 10 MPa)	Maintenance-free long-term, non-detachable	High temp, high pressure, corrosive, zero-leakage
Gasketed plate	Rubber gasket	Limited (<180°C / 2.5 MPa)	Detachable, regular gasket replacement	Moderate conditions, frequent cleaning
Shell & tube	Flange + gasket	High	Complex maintenance, large size	High pressure, high viscosity, particle-containing media

Selection & Notes

Material (316L / titanium / Hastelloy) depends on medium composition (corrosiveness, particles).
Flow rate, temperature difference and allowable pressure drop determine plate type, passes and heat transfer area.
Prioritize products with 100% weld inspection (helium leak detection).
Higher initial investment than gasketed types; non-detachable on-site, so chemical cleaning ports are recommended.

Fusion-Welded Heat Exchanger Welded Heat Exchanger Food-Grade Welded Heat Exchanger No Gaskets Heat Exchanger

Product Category

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