Sunday, September 20, 2015

Getting Conversant With Heat Exchanger Tube Plugs

By Daphne Bowen

When it comes to selection of the devices to be used in heat exchange, it is the house engineers and designers who have to take action. Also, the tube plugs manufacturers have their role to play. Going about it blindly will give a bad outcome. Water quality, design of the devices and techniques of operating and maintaining the devices affect the choices made. Below is an outlook of facets of heat exchanger tube plugs.

On water quality, consider the temperature, PH, residual manganese and chlorine, sulfide level, chloride level, dissolved oxygen, the water purity and the tendency to form sediments. Ions of iron, sodium, magnesium and calcium are less likely to form deposits and this is why their concentration goes up in coolers of water boilers. The type of alloys used to make the plugs depend on the chloride concentration in the H2O .

Oxygen that has dissolved in water makes the tubes corrode faster. This is why it is important to add substances to bring down the oxygen levels in water. Copper alloy tubes are not very effective when the water has high oxygen concentration. In addition, they are not resistant to dirty water when sulfate is present. The best plugs to go for in such a situation are the ones made from titanium and stainless steel.

When chlorine is dissolved in water, the compounds formed are highly corrosive. For those who are keen on matters touching on water, you already know that the main water purifier in the world is chlorine. For this reason tube plug manufacturers have to think about how to address the problem chlorine causes to water plugs because its use cannot be avoided. The situation is intensified if the water is hot.

Low pH means that the corrosion of plugs will happen quickly. The acidic compounds typically have low pH. Nonetheless, use of copper alloys in manufacture of devices can eliminate this problem. Besides strong acids, strong alkalis are corrosive too and they will cause damages to the tubes. The best alternative is ensuring that the pH of the water components is near neutral.

Discoloration of water as it gets deposited is seen if the ions of manganese element and iron are high in water. Some plugs perform badly when the H2O is fresh. Understanding the properties of the product that will be passing through the tube will guide you in purchasing the product that will offer you the maximum advantages.

Sedimentation and mass absorption determines the degree of thermal transfer in these devices. If a protective layer is formed on the inside of the tubes, the level of thermal transfer will be reduced and also flow section degree. Another benefit this offers is resistance to transfer of thermal energy. This is referred to as fouling factor. There are no well-defined methods and formulas of calculating this factor. Many of these values given on the same are just estimates.

Many people go for cheap products because they do not want to spend much. What they forget is that the cost of maintenance and operating such devices will cost them a lot in the end.

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