Boucle yarn is a specialized type of yarn that is usually made of three plies. Among the three plies used to create this yarn, one thread is usually looser than the others. The looser thread causes the yarn to have a rough feeling and a bulky look. This also makes it more likely to unravel than some other types of yarn.
Cold Metal Transfer - CMT - A Revolution in Mechanized Root Pass Pipeline Welding. CMT is the abbreviation for Cold Metal Transfer. The CMT process was originally intended for use as a method for joining thin gauged materials in the automotive industry. In 2006 CRC-Evans initiated an investigation to understand if this technology was suitable for root pass deposition on pipeline girth welds.
Heat transfer is the exchange of thermal energy between physical systems. The rate of heat transfer is dependent on the temperatures of the systems and the properties of the intervening medium through which the heat is transferred. The three fundamental modes of heat transfer are conduction, convection and radiation. Heat transfer, the flow of energy in the form of heat, is a process by which a system changes its internal energy, hence is of vital use in applications of the First Law of Thermodynamics.