Hydro testing can be defined as the way process through which leaks can be found in pressure vessels or equipments such as pipelines, boilers and reactors. Water is used during this process. Pressure vessels are prone to rust and corrosion in case of humid atmosphere. Presence of water particles after hydro testing in pressure vessels can lead to corrosion. Internal corrosion caused by condensed water and has been detected in many vessels. During a short span of time corrosion can lead to complete failure of extensive area of the vessels. So after hydro testing pressure vessels or equipments should be dried completely without any trace of moisture.

General Recommendation

• Usually four methods are commonly used for drying of pipelines viz
• Dry air through dehumidifier. 
• Nitrogen purge drying. 
• Vacuum drying. 
• Hot air drying by compressed air dryer. 

Out of it the most reliable and proven method is drying through dehumidification and is most used all over the world.

TDS Solution

TDS provides desiccant based dehumidifiers along with other auxiliary air handling equipments for pressure vessel drying after hydro-testing. Dry air adsorbs all the moisture present in the vessel. The dry dehumid air is supplied at positive pressure of 100 changes per/hr. This dry air when comes in touch with the moisture present in the pipeline dries it after certain duration. Following are some major benefits of dehumidifcation:

• All free water is removed from pipeline. 
• Very low air dew point can be achieved . 
• Drying time is accurate and can be programmed according to period available. 

To provide the above parameters TDS provides a complete customized package solution of dehumidifiers,condensing units,blowers & ducts backed with technical manpower to maintain the required moisture and temperature level. The main USP of TDS services is that it provides highly qualified technical manpower along with all the required equipments and the service is provided on rental basis so it can be availed whenever required.