Fully Welded Plate Heat Exchanger
What is a Fully Welded Plate Heat Exchanger ?
A fully welded plate heat exchanger (PHE) is a type of heat exchanger where the plates are permanently welded together instead of using gaskets. This design eliminates the need for removable seals, making it suitable for high-pressure, high-temperature, and corrosive applications where traditional gasketed plate heat exchangers would fail.
Selection tip：Choose fully welded PHEs when:
Key Features
No gaskets
All plates are laser-welded or brazed, preventing leakage.
Compact & robust
Higher pressure/temperature resistance than gasketed PHEs.
Corrosion-resistant
Can be made from exotic metals (titanium, Hastelloy, etc.).
Low maintenance
No gasket replacement required.
Fully Welded Plate Heat Exchangers (PHEs) – Applications and Process Details Across Industries
Fully welded PHEs are used in industries where reliability, high efficiency, and resistance to extreme conditions are critical.
Fully welded plate heat exchangers are robust, compact, and highly efficient thermal transfer devices used in industries where high pressure, high temperature, or corrosive fluids are involved. Unlike gasketed PHEs, they eliminate leakage risks and are suitable for aggressive media. Below is a detailed breakdown of their applications and process flows across key industries.
Application scenarios:
Heat exchange of process fluids under high temperature and high pressure conditions (such as cooling or heating of reactor inlet/outlet logistics).
Heat exchange of corrosive media (such as acid gases, alkanes).
Specific examples:
In refineries, used for cooling of reaction products (pressure can reach more than 10MPa).
Heat recovery of cracking gas, replacing traditional shell and tube heat exchangers to save space.
Welded heat exchangers using Hastelloy plates are resistant to strong acid corrosion.
Application scenarios:
Heat exchange of high-purity or highly toxic media (avoiding the risk of gasket leakage).
Heat recovery in solvent condensation and distillation processes.
Specific examples:
Condensation and evaporation of acetic acid media.
Aseptic heat exchange in API (active pharmaceutical ingredient) production, such as cooling of vaccine fermentation broth.
Heating reaction of chlorinated organic matter.
Application scenarios:
Waste heat recovery of gas turbines, auxiliary cooling systems of nuclear power plants.
Energy conversion of geothermal or solar thermal systems.
Specific examples:
Recover waste heat from gas turbine exhaust to heat boiler feed water.
Heat exchange of non-radioactive auxiliary circuits (such as closed cooling water systems).
Advantages Over Other Heat Exchangers
Key Advantages
Limitations of Fully Welded PHEs
Cannot be disassembled for cleaning (requires CIP systems).
Higher initial cost than gasketed PHEs.
Not ideal for viscous fluids (plate gaps are narrow).
Fully welded plate heat exchangers are ideal for demanding industrial processes where high pressure, temperature, or corrosive fluids rule out gasketed designs. They outperform shell-and-tube exchangers in efficiency and compactness while offering zero-leak reliability. Common applications include oil & gas, chemicals, power plants, and high-purity industries.
Our Production Plant
Frequently Asked Questions
Answer: We are a factory manufacturing plate heat exchangers in Jiangsu, China. More than 15 years ofproduction experience.
Answer: Sure, Welcome coming to visit our factory! We are located in No.198 Zhongshan Road, Qiaoqi, Xuxiake Town, Jiangyin City, Jiangsu, china.
Answer: It depends on which product you purchased, factory workload, outsourcing period of specialmaterial etc.Our fastest delivery time for Gasketted plate heat exchanger is ex-works 2~3 weeksafter replacement oforder.
Answer: We guarantee our product quality in the process of manufacturing, such as:
Raw material check,e.g.PMl, traceability.
Manufacturing process inspection.
Plate pressing inspection.eq.PT RT.
Welding inspection,eg.WPS,PQR,NDE,dimension.
Assembly inspection.
Final assembly dimensionalinspection.
Final hydraulic test.
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