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Welding Glossary


 * Ladders **


 * Lap Joint ** - A lap joint is a joint preparation between two overlapping members. (2)**Lap Joint** - A joint where two pieces of metal lap over each other, allowing a bead to be placed between the edge of one piece and the face of the other.


 * Layer ** - A stratum of weld metal or surfacing material. The layer may consist of one or more weld beads laid side by side.


 * LEAD - ** The welding and cutting of lead-bearing alloys or metals whose surfaces have been painted with lead-based paint can generate lead oxide fumes. Inhalation and ingestion of lead oxide fumes and other lead compounds will cause lead poisoning. Symptoms include metallic taste in the mouth, loss of appetite, nausea, abdominal cramps, and insomnia. In time, anemia and general weakness, chiefly in the muscles of the wrists, develop. Lead adversely affects the brain, central nervous system, circulatory system, reproductive system, kidneys, and muscles.


 * Leg of a Fillet Weld ** - The distance from the root of the joint to the toe of the fillet weld.


 * Light Rays **

[|Lincoln Electric] - Headquartered in Cleveland, Ohio, Lincoln Electric has more than 40 manufacturing locations, including operations and joint ventures in 20 countries and a worldwide network of distributors and sales offices covering more than 160 countries.


 * Lincoln VRTEX**


 * Liquidus ** –Liquidus **is** the lowest temperature at which a metal or an alloy is completely liquid.


 * Local Preheating ** - Preheating a specific portion of a structure.


 * Local Stress Relief Heat Treatment ** - Local Stress Relief Heat Treatment is a stress relief heat treatment of a specific portion of a structure.


 * Longitudinal Sequence ** . Longitudinal Sequence is the order in which the increments of a continuous weld are deposited with respect to its length. See back-step sequence, block sequence, etc.

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