Should you use copper, aluminum or stainless steel for your evaporator tubing? It’s a common question across industries like chemicals, pharmaceuticals, food and beverage and wastewater treatment. For many, stainless steel offers significant advantages in terms of cleanliness, hygiene and corrosion resistance.
Moving liquids by heat
Evaporators, which are essentially heat exchangers, are crucial to many industries for their ability to remove liquid from a suspension, by heating the mixture to promote evaporation. The tubing used can be exposed to high chloride content, extreme pH values and other media with a risk for crevice corrosion caused by deposits – resulting in leaks or failures.
Other challenges include
- Corrosion: High humidity, corrosive chemicals, or acidic refrigerants can degrade tube material, causing structural weakness and leaks.
- Fouling: Dirt or biological growth on tube surfaces reduces heat transfer efficiency and increases energy consumption.
- Mechanical damage: Stress, vibration, or impacts can deform or crack tubes, affecting performance.
- Scaling: Mineral deposits reduce heat transfer efficiency and may lead to corrosion.
- Temperature variations: Fluctuating temperatures cause thermal stress, leading to fatigue, cracking, or damage
Alleima evaporator tube
With this in mind, we offer a wide range of tube possibilities for evaporator tube grades that are suitable for environments with high chloride contents, extreme pH values and for media with risk for crevice corrosion caused by deposits.
| Material | Description |
|---|---|
| SAF™ 2707 HD | A hyper-duplex stainless steel with excellent resistance to crevice corrosion in chloride containing media. The grade is a very competitive alternative to expensive nickel alloys. |
| SAF™ 2507 | A super-duplex stainless steel with very good corrosion resistance in seawater and other chloride containing media. |
| SAF™ 2906* | A super-duplex stainless steel suitable for use in sodium hydroxide (NaOH). |
| Sanicro® 28 | A high-alloy austenitic stainless steel with very good corrosion properties. The grade is particularly suited for use in phosphoric acid production. |
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