Glossary and Abbreviations
- API (organization): American Petroleum Institute
- ASME (organization): American Society of Mechanical Engineers
- AWS (organization): American Welding Society
- FCP: Flexible Ceramic Pad. This is the heater used in electrical resistance HT.
- GCB: Gradient Control Band. This is the widest band and covers all area under insulation.
- HAZ: Heat Affected Zone. It refers to the parts of the base metal that is around a weld and has been affected by the heat from welding activities.
- HB: Heated Band. This band receives most of its heat from the SB, and its size is in-between that of GCB and SB.
- HT: Heat treatment. This is the engineering process used to prepare materials for welding, transformation, etc.
- Hydrogen Bakeout: This HT process is used to remove harmful substances from the workpiece, such as hydrogen, moisture, etc. In other words, it removes more than just hydrogen.
- LNG: Liquid natural gas. Examples are: methane, ethane, etc. This industry uses a lot of HT, welding, etc.
- Lower Critical Temperature: This refers to the temperature HT must avoid reaching or exceeding because it may change a material’s attributes and molecular structure. Different materials can have different lower critical temperatures.
- NBIC (organization): National Boiler Inspection Code
- OD: Outer Diameter. This term is usually used to describe a pipe’s size, and it refers to a pipe’s diameter that includes the thickness of the pipe wall.
- Post-Heating: This HT process may not be present in all HT projects and is often used to transition the HT process in-between shifts.
- PPE: Personal protective equipment. Example are gloves, face-shield, etc.
- Pre-Heat: This HT process begins before the welding starts and continues through the welding process.
- PWHT: Post-Weld Heat Treatment. This HT process takes place after the welding is done.
- SB: Soak Band. This band is the narrowest, hottest band situated at the heart of the GCB and SB.
- T/C: Thermocouple. This is the temperature monitor and control device attached to the workpiece.
- Welding Tacks: It refers to the small welds (also called spot welds) that hold things in place before the welding begins.
- WRC (organization): Welding Research Council
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