The hammer union tee is a tee device for high pressure manifold. It has three ports, which can be made into different inlets and outlets according to different needs, including T-type and Y-type, etc., it can be used for three identical or different pipe connections, with acid and alkali resistance, high temperature resistance and other characteristics. The hammer union tee is made by professional forging process which adopts American standard, and it is mainly used in petroleum, chemical industry, fire protection system, aerospace, water conservancy and electricity, shipbuilding and other industries.