API Std 650 mechanically-anchored flat-bottom tanks swing-type check valve
API 650 storage tank is used for commonly used oil, gasoline, diesel, chemical and production water storage. API Std 650 mechanically-anchored flat-bottom tanks Storage tanks built to these standards are spread across U.S. refineries, terminals, pipelines, and production facilities. The API 650 detailed standard specifies the design, processing, welding, inspection and installation procedures for storage tanks.
API Std 650 mechanically-anchored flat-bottom tanks basic components are those that contain the vaporized liquefied gas from the stored refrigerated liquid but primarily operate at atmospheric temperatures because of insulation system design and natural ambient heating. These components shall comply with the basic rules of this standard. Examples of such components are the outer wall and roofs of double-wall tanks and roof components above an internally insulated suspended deck. The API 620 tank materials requirements are based on the storage of refrigerated products at the design metal temperature.
Tank cracks are common API Std 650 mechanically-anchored flat-bottom tanks defects, mainly including tank wall cracks, internal cracks, weld zone cracks. The reason for these defects may be that the defects not exceeding the standard existed in the early stage of API Std 650 mechanically-anchored flat-bottom tanks construction, which become obvious after the later use. Or in the process of using the API Std 650 mechanically-anchored flat-bottom tanks, the tank body material generated new defects due to corrosion, pressure, wear and other reasons, and tank cracks.
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