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A leak-resistant pipe joint designed with a tight-fitting sleeve that exerts a large inward pressure on the exterior of the pipe.



Related Terms

PIPE CUTTER

A hand tool consisting of a clamplike device with three cutting wheels which are forced inward by screw pressure to cut into a pipe as the tool is rotated around the pipe circumference.

EQUALIZING LINE

A pipe or tubing interconnection between two closed vessels, containers, or process systems to allow pressure equalization.

BLIND

A solid disk inserted at a pipe joint or union to prevent the flow of fluids through the pipe; used during maintenance and repair work as a safety precaution. Also known as blank.

LEAD JOINT

A pipe joint made by caulking with lead wool or molten lead.

EXPANSION OPENING

A chamber in line with a pipe or tunnel and of larger diameter than the conduit containing liquid or gas, to allow lowering of pressure within the conduit by expansion of the fluid.

ELBOWMETER

Pipe elbow used as a liquids flowmeter; flow rate is measured by determining the differential pressure developed between the inner and outer radii of the bend by means of two pressure taps located midway on the bend.

GLAZING

  1. Cutting and fitting panes of glass into frames. 2. Smoothing the lead of a wiped pipe joint by passing a hot iron over it.

BACK SIPHONAGE

The flowing back of used, contaminated, or polluted water from a plumbing fixture or vessel into the pipe which feeds it; caused by reduced pressure in the pipe.

POHLE AIR LIFT PUMP

A pistonless pump in which compressed air fills the annular space surrounding the uptake pipe and is free to enter the rising column at all points of its pressure but sometimes welded or bonded.

MATHESON JOINT

[DESENG] A wrought-pipe joint made by enlarging the end of one pipe length to receive the male end of the next length.

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