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A circumferential weld in pipe fusing the abutting pipe walls completely from inside wall to outside wall.

Related Terms

HEAT EXCHANGER

A device which transfers heat through a conducting wall from one fluid to another.

SEA CHEST

An opening for supplying seawater to condensers, pumps, etc. located in the hull below the waterline and having means for the attachment of the associated piping

LAGGING

A covering, usually of insulating material, on pipe or ducts.

BYPASS

A pipe or duct, usually controlled by valve or damper, for conveying a fluid around an element of a system.

HEADER PIPE

A distribution pipe supplying a number of smaller lines tapped off of it. A main receiving pipe supplying one or more main pipe lines and receiving a number of supply lines tapped into it.

MULTIPHASE FLOW VELOCITY

The flow velocity of a multiphase flow. It may also be defined by the relationship (Multiphase volume flow rate / Pipe cross-section).

SUPERFICIAL PHASE VELOCITY

The flow velocity of one phase of a multiphase flow, assuming that the phase occupies the whole conduit by itself. It may also be defined by the relationship (Phase volume flow rate / Pipe cross-section).

DRY PIPE

A perforated or slotted pipe or box inside the drum and connected to the steam outlet.

THERMAL INSULATION

Material which is a poor conductor of heat; used to retard or slow down flow of heat through wall or partition.

ICE WALL

An ice cliff forming the seaward margin of a glacier which is not afloat. An ice wall is aground with the underlying land at or below sea level.
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