annular plate definition
A283 Gr.C comes under group I and the following part of API 650 is self explainatory. 5.5 ANNULAR BOTTOM PLATES. 5.5.1 When the bottom shell course is designed using the allowable stress for materials in Group IV, IVA, V, or VI, butt-welded. annular bottom plates shall be used (see 5.1.5.6). When the bottom shell course is of a material in Group IV, IVA, V, or VI and the. The peripheral bottom part (annular bottom. plates) also takes part in the calculations, as a. part of stabilising forces, depending on its. thickness, width, strength. 1. Foreword. During their exploitation the tanks may not. be completely emptied. While some may think that the annular plate is lowly stressed like the bottom plates, the annular plate-to-shell junction is actually subjected to high stresses. This is because the annular plate tends to restrain the radial growth of the tank shell due to both hydrostatic pressure loads and temperature. According to [1] and , the calculated [2] width L of the assisting bottom part always is. 500 mm, independently on the steel, thickness. and the real width le of the annular bottom. plates. Subject: [MW:586] Re: Annular bottom plates from API-650 Tanks. I think you are missing the copy of API 650......! A283 Gr.C comes under group I and the following part of API 650 is self explainatory. annular bottom plates shall be used (see 5.1.5.6). plates (see 5.1.5.4) may be used in lieu of butt-welded annular bottom plates. 1. any patch or flat area. 2. a clear area of cell lysis caused by viral replication on a cell monolayer. amniotic plaque. small, 1 to 2 inch diameter, poxlike lesion on the inside of the amnion. Constant on the bovine amnion during the middle trimester and causes no problems. Etymology: Fr, plate. 1 a flat, often raised patch on the skin or any other organ of the body. 2 a patch of atherosclerosis. 3 also called bacterial plaque, a usually thin film on the teeth. It is made up of mucin and colloidal material found in saliva and often secondarily invaded by bacteria. By Doug Stelling. The annular plate-to-shell junction is one of the most critical areas in an API 650 Tank, and is one of the most difficult areas in which to assess corrosion. The annular plate typically rests on a crushed stone or concrete ring wall, and joins the highly stressed shell of the tank to the bottom plates. The bottom plates are for the most part supported by the tank pad or foundation, and are lowly stressed. plaque, tooth-surface-attached, n a type of subgingival plaque that uses selective attachment factors and is located in the subgingival area. This type of plaque is implicated in the formation of caries of the root and eventual breakdown of the root (resorption). A biofilm of bacteria in a matrix of polysaccharides and other substances on the surface of a tooth or teeth. 3. a. A deposit of fatty material on the inner lining of an arterial wall, characteristic of atherosclerosis. b. The material that such a deposit is composed of.
The annular plate-to-shell junction is one of the most critical areas in an API 650 Tank, and is one of the most difficult areas in which to assess corrosion.