A covering used to prevent the radiation or conduction of heat, e.g. boiler casing.

Usually non-profit organizations originally introduced to protect the interests of shipowners and cargo owners and their insurers to ensure that the ship and its cargo will safely reach their destination.

The process of class assignment starts with the application made by the owner or the builder. The documents relevant to the class applied for are submitted for the review of the society.

Certificates for hull, machinery installations, boilers, automated installations, etc, issued by a classification society to confirm the class of the ship.

The assigning of class to merchant ships according to certain rules established by aclassification society.

Classification certificates are issued for a period known as the class term or the term. The first term starts from the date of the initial classification survey.

Any member of the technical staff of the classification society. The primary task of classification society surveyors is to survey in order to maintain the standards of construction and condition of ships and machinery...

Permanent repair completed at the time of the survey to the satisfaction of the surveyor, therein removing the need for imposition of any associated condition of class.

The classification details of a ship hull or machinery using particular terms or abbreviations, e.g. oil tanker, UMS (unattended machinery space).

This is the sum of the area bounded by the outline of the blades when projected onto a plane perpendicular to the axis of the screw.

A disc which replaces the gravity disc in the separator bowl in the case of clarifier operation. The disc seals the water outlet in the bowl, thus no liquid seal exists.

The gradual collapse of the hull girder, involving the spread of elasto-plastic buckling throughout a transverse section, following which the vessel is no longer capable of sustaining any longitudinal bending loads.

A separator that cleans the oil from solid particles and traces of water.

Liquid/solids separation with the intention of separating solid particles from a liquid having a lower density than the particles.

A side elevation of a ship form.

A small electric track used onboard to handle paper reels and powered by electric cable from the ship supply.

A pipe used in wells to conduct fluid from the producing formation into the Christmas tree. Unlike the casing, the tubing is designed to be replaced during the life of the well, if required.

A centrifugal or axial-flow type pump which supplies large volumes of water to a system, usually for cooling purposes, e.g. jacket water circulating pump, seawater circulating pump.

A drawing which details the functioning of a circuit. All the essential parts and their connections are shown by special symbols.

The processing, safety and control systems, utility and auxiliary equipment, for producing hydrocarbon liquid and gas mixtures from completed wells or other sources.