Union joint
| (Mech.) | A joint formed by means of a union. |
| A piece of pipe made in the form of the letter |
See also: Union, Union
Union Joint
union joint
[′yün·yən ‚jȯint]Union Joint
a detachable joint, formed by means of a union, that is used to connect the parts of a piping system to various tanks or machines. Besides a union, a union joint consists of a gasket, a locknut, and a reducer, such as an elbow or a coupling (Figure 1). The pipe to be connected is screwed into the reducer.
When the locknut is loosened, the reducer, together with the pipe screwed into it, may be turned relative to the axis of the union. A rigid, airtight joint is obtained by tightening the locknut.
union joint
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