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.



Related Terms

SHIP’S EMERGENCY TRANSMITTER

As defined by the International Telecommunication Union (ITU) a ship’s transmitter to be used exclusively on a distress frequency for distress, urgency or safety purposes.

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).

COMPRESSION FITTING

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

BELL-AND-SPIGOT JOINT

A pipe joint in which a pipe ending in a bell-like shape is joined to a pipe ending in a spigot-like shape.

SAFETY VALVE ESCAPE

A pipe conducting steam discharged from a safety valve to a safe location.

LAMINAR FLOW

Laminar flow described as a series of liquid cylinders in the pipe enclosed in each other, where the innermost parts flow the fastest, and the cylinder touching the pipe is steady. Re < 2300 (Reynolds number)

FUEL VALVE CONTROL

An automatically or manually operated device consisting essentially of a regulating valve and an operating mechanism. It is used to regulate fuel flow and is usually in addition to the safety shut-off valve. Such valve may be of the automatic or manually opened type.

TURBULENCE

A deviation from parallel flow in a pipe due to rough inner walls, obstructions or directional changes.

SLUG

A solid body of boiler water passed into the steam flow by priming or picked up from a pocket of condensate in the steam line.

INTERNATIONAL MARITIME ORGANISATION

(IMO) - a United Nations agency concerned with safety at sea. Its work includes codes and rules relating to tonnage measurement of vessels, load lines, pollution and the carriage of dangerous goods. Its previous name was the Inter-Governmental Maritime Consultative Organisation (IMCO).

Related questions

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