How to avoid scale formation on stainless steel elbows?
How to avoid scale formation on stainless steel elbows?

The elbow formed by the hot pressing or forging process of steel is a stainless steel elbow. The stainless steel elbow is butt welded with the steel pipe through the elbow. The two workpieces are welded together along the entire end face by resistance heating. There are usually two types of resistance butt welding and flash butt welding. This method has high productivity and is easy to realize automation, so it has been widely used. When using ball valves, globe valves and gate valves with stainless steel elbows, they are not allowed to be used for flow adjustment. They can only be fully opened or fully closed to avoid sealing surfaces. Corrosion and accelerated wear, the gate valve and the threaded stop valve are equipped with a reverse sealing device, and the handwheel is turned to the upper position and tightened to prevent the medium from leaking from the packing.

Most of the stainless steel elbow fittings are used for welding. In order to improve the welding quality, a certain angle and edge groove are opened at both ends. The surface quality and mechanical properties of the elbow are basically the same as those of the pipe. In order to facilitate welding, the steel to be connected to the pipe Should be the same, stainless steel elbows can resist the corrosion of various chemical media except for a few hydrogenation agents.

Stainless steel elbow is a relatively common type of industrial equipment at present. After a long period of use, scaling may occur. If the scaling is serious, it will affect the normal use of the equipment, so we should take some measures to Solve this problem and make the equipment more effective.

1.Hardness of circulating cooling water

The operating process of circulating water in the equipment is similar to the operating process of boiler water in a low-pressure hot water boiler. Therefore, in accordance with the water quality standards for hot water boilers, the water quality can be managed not only to prevent scaling of stainless steel elbows but also to prevent corrosion.

2.Temperature control of circulating cooling water

The difference between the temperature of the water ring in the stainless steel elbow and the water temperature of the softening pool is an important factor that causes fouling. Therefore, increasing the circulating water supply and improving the cooling effect is an important guarantee for limiting the rate of fouling. Therefore, during the operation of circulating cooling water, it is necessary to monitor the return water temperature and return water volume of each stainless steel elbow to ensure that the normal water supply volume of each pump and the return water temperature do not exceed 40°C. The water supply can be controlled by a valve. If the temperature of the return water exceeds the regulation, it is necessary to supplement low-temperature cold water or use other cooling methods to reduce the temperature of the softened water in the softened pool.

3.Flush the pump body regularly

The pump body drain gate valve, in addition to normally draining the water in the pump, can also use the water pressure of the pump body to periodically flush the dirt and slag in the pump during operation. On the one hand, it can prevent the accumulation of dirt, and on the other hand, it can also be used. Prevent water slag from turning into scale.

The above is an introduction to how to avoid scaling of stainless steel elbows. In order to prevent the impact and harm caused by equipment scaling, we must understand the use process of the equipment in time during daily use. Once scaling occurs, we must Do a good job of cleaning and maintenance in time, so that the service life of the equipment can be longer.

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