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2. Hot work - Wikipedia

   en.wikipedia.org/wiki/Hot_work

   Hot work. Hot work is a process that can be a source of ignition when flammable material is present or can be a fire hazard regardless of the presence of flammable material in the workplace. Common hot work processes involve welding, soldering, cutting, brazing burning and the use of powder-actuated tools or similar fire producing operations ...

3. Positive pressure enclosure - Wikipedia

   en.wikipedia.org/wiki/Positive_pressure_enclosure

   Positive pressure enclosure. A positive pressure enclosure, also known as a welding habitat or hot work habitat, is a chamber used to provide a safe working environment for performing hot work in the presence of explosive gases or vapors. They are commonly used in welding environments and are associated with the offshore oil industry.

4. Post weld heat treatment - Wikipedia

   en.wikipedia.org/wiki/Post_weld_heat_treatment

   Post weld heat treatment. Post weld heat treatment (PWHT) is a controlled process in which a material that has been welded is reheated to a temperature below its lower critical transformation temperature, and then it is held at that temperature for a specified amount of time. [1] It is often referred to as being any heat treatment performed ...

5. Hot tapping - Wikipedia

   en.wikipedia.org/wiki/Hot_tapping

   Hot taps can range from a ½ inch hole designed for something as simple as quality control testing, up to a 48-inch tap for the installation of a variety of ports, valves, t-sections or other pipes. Hot Tap Procedures: A. A hot tap saddle, service saddle or welded threadolet, valve installed, assembly is pressure tested and hot tap machine ...

6. List of welding processes - Wikipedia

   en.wikipedia.org/wiki/List_of_welding_processes

   Two pointed electrodes apply pressure and current to two or more thin workpieces. Automobile industry, Aerospace industry. Resistance seam welding [6] 22. RSEW. Two wheel-shaped electrodes roll along workpieces, applying pressure and current. Aerospace industry, steel drums, tubing. Projection welding. 23.

7. Heat treating - Wikipedia

   en.wikipedia.org/wiki/Heat_treating

   Heat treating (or heat treatment) is a group of industrial, thermal and metalworking processes used to alter the physical, and sometimes chemical, properties of a material. The most common application is metallurgical. Heat treatments are also used in the manufacture of many other materials, such as glass. Heat treatment involves the use of ...

8. Annealing (materials science) - Wikipedia

   en.wikipedia.org/wiki/Annealing_(materials_science)

   In metallurgy and materials science, annealing is a heat treatment that alters the physical and sometimes chemical properties of a material to increase its ductility and reduce its hardness, making it more workable. It involves heating a material above its recrystallization temperature, maintaining a suitable temperature for an appropriate ...

9. Exothermic welding - Wikipedia

   en.wikipedia.org/wiki/Exothermic_welding

   A thermite weld in progress. Exothermic welding, also known as exothermic bonding, thermite welding(TW),[1]and thermit welding,[1]is a weldingprocess that employs molten metal to permanently join the conductors. The process employs an exothermic reactionof a thermitecomposition to heat the metal, and requires no external source of heat or current.