API 650 carbon steel storage tanks guide pole erection tolerance requirements
In order to prevent the deformation of the bottom of metal vertical storage tank, API 650 carbon steel storage tanks during welding, the number of welders should be reasonably distributed. When welding metal vertical API 650 carbon steel storage tanks, personnel and welding position shall be reasonably allocated according to the actual situation of welding personnel, and random welding is not allowed.
The thickness of the API 650 carbon steel storage tanks annular bottom plates shall be in accordance with Table Q-4 (for steel or aluminum, as applicable). The thicknesses shown are minimums. The ring of annual plates shall have a circular outside circumference, but it may have a regular polygonal shape inside the tank shell with the number of sides equal to the number of annular plates. These pieces shall be butt-welded in accordance with Q.7.1.1, Item b. The plates of the first shell course shall be attached to the annular bottom plates by a weld as required by API 620 oil tank 5.9.5 except when a full-penetration weld is used or required (see Q.7.1.1). Butt-welds in annular plates shall be not closer than 12 in. from any vertical weld.
API 650 Application As described by the American Petroleum Institute, the fabrication and installation of our surface welded API 650 carbon steel storage tanks steel storage tanks is normally used in industrial applications. In general, our standards for industrial on-site installation of storage tanks are established according to API 650, API 620 and API 12D.
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