pipe union
pipe joint

On checking, he found out that a pipe union had pushed apart.

Pipe unions are essentially a type of flange connector, as discussed further below.

The upper end of the gauge can be supplied with an automatic safety vent valve or, alternatively, a pipe union connection.

Each coil is easily removed for cleaning, being fastened by individual pipe unions through the side of the evaporator.

Most threaded pipe systems require occasional use of pipe union fittings to allow final assembly.

You can use more bends and elbows to make a rigid pipe union, of course, but this adds still further to the 'Windscale' appearance of the thing.

Brass Unions The most comprehensive range of solid brass brake, clutch and fuel pipe unions, bleed screws, olives, in-line and 3/4-way connectors.

The whole high pressure part of the system is manufactured from steel tubing of small diameter, connected to valve control units by Lockheed type pipe unions with special seals made from desmopan rubber, a type of rubber compatible with the LHM fluid.