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Connection mode and special design of welded ball valve and main pipeline

Release date: December 30, 2018

The connection mode and special design of welded ball valve and main pipeline are adopted. The connection between welded ball valve and main pipeline is welded. If the valve is not fully welded with the standard of gb23.0 m, the valve shall be welded again at both ends of the valve in case the valve is not fully welded to the standard of gb23 The ball is damaged by the spatter of welding slag, and the temperature of the inner seal of the valve shall not exceed 140 ℃. Appropriate cooling measures can be taken if necessary.

 Welded ball valve

The welded ball valve adopts special structural design and has the characteristics of maintenance free. Before burying, Pu special anti-corrosion coating is applied on the outside of the valve. At the same time, the three injection pipes for emergency grease injection of valve seat and valve stem, and the vent pipe and valve rod of the middle chamber are appropriately extended according to the depth of the ground, so that the staff can complete all operations on the ground. After directly buried in the ground, small valve hand well can be built. However, the conventional non welded ball valve can not be directly buried, and large valve wells need to be built. As a result, dangerous confined space is formed, which is not conducive to operation. At the same time, the valve body itself and the bolt connection part between the valve body and the pipeline will be corroded, which will affect the service life of the valve.

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