LEG

Liquefied Ethylene Gas. This gas is not a natural product, but is produced by cracked wet gas, such as, Ethane, Propane, and Butane or from Naphtha. Ethylene has a boiling point at atmospheric pressure of -103,8oC, and therefore has be transported in gas carriers equipped with cargo compartment that can bear such a low temperature. Cascade plants are used to condense Ethylene. As critical temperature of Ethylene is 9,7oC one can not utilise water to condense Ethylene. The definition of Ethylene tankers is LPG/LEG carrier.

Ethylene is very flammable and has a flammable limit from 2,5% to 34% by volume mixed with air. There are stringent demands regarding the oxygen content in Ethylene. The volume of ethylene must be less than 2% in the gas mixture to keep the mixture below the LEL "lower explosion limit". Normally, there are demands for less than 0,2% oxygen in the gas mixture in order to prevent pollution of the cargo.

Ethylene is utilised as raw material for plastic and synthetic fibres.

Ethylene is transported from the Persian Gulf to the East, the Mediterranean to the East and Europe, the Caribbean to South America. There is also transport of Ethylene between the countries Malaysia, Indonesia and Korea



Related Terms

LEFT-LAID

The lay of a wire or fiber rope or cable in which the individual wires or fibers in the strands are twisted to the right and the left-laid leg strands to the left. Also known as left-handed;

HERMAPHRODITE CALIPER

A layout tool having one leg pointed and the other like that of an inside caliper; used to locate the center of irregularly shaped stock or to lay out a line parallel to an edge.

LEG

A segment of a voyage between two waypoints.

TACK

A leg of the route of a sailing vessel, particularly in relation to tacking and to starboard tack and port tack .

TACKING DUELS

In sailboat racing on an upwind leg of the race course the complex manoeuvres of lead and overtaking boats to vie for the aerodynamic advantage of clear air. This results from the ongoing strategy of the lead boat's effort to keep the following boat(s) in the blanket of disturbed bad air he is creating.

COMPASSES

An instrument for drawing circles. In its most common form it consists of two legs joined by a pivot, one leg carrying a pen or pencil and the other leg being pointed. An instrument for drawing circles of large diameter, usually consisting of a bar with sliding holders for points, pencils, or pens is called beam compasses. If both legs are pointed, the instrument is called DIVIDERS and is used principally for measuring distances or coordinates.

DIVIDERS

An instrument consisting two pointed legs joined by a pivot, used principally for measuring distances or coordinates on charts. If the legs are pointed at both ends and provided with an adjustable pivot in the middle of the legs, the instrument is called proportional dividers. An instrument having one pointed leg and one leg carrying a pen or pencil is called COMPASSES.

SIPHON

A pigtail-shaped pipe or a drop leg in the pipe leading to a steam pressure gauge, serving to trap water in the gauge and prevent overheating from direct contact with steam.

PASSAGE

1. A navigable channel, especially one through reefs or islands. Also called PASS. 2. A transit from one place to another; one leg of a voyage.

KNEE

1. Connects two parts roughly at right angles, e.g. deck beams to frames. 2. A vertical rubber fender used on pushboats or piers, sometimes shaped like a human leg bent slightly at the knee.

Related questions

MarineProHelp 2018 - 2020