ISO 630 Gr E275 plates API standard 650 aboveground steel oil storage tanks
The API Std 650 standard published by the American Petroleum Institute (API) is designed to provide the petroleum industry with welded steel tanks for use in the API standard 650 aboveground steel oil storage tanks storage of petroleum products and other liquid products commonly handled and stored by the various branches of the petroleum industry.
Tank cracks are common API standard 650 aboveground steel oil storage 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 standard 650 aboveground steel oil storage tanks construction, which become obvious after the later use. Or in the process of using the API standard 650 aboveground steel oil storage tanks, the tank body material generated new defects due to corrosion, pressure, wear and other reasons, and tank cracks.
The thickness of the API standard 650 aboveground steel oil 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.
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The mode of iron and API standard 650 aboveground steel oil storage tanks steel logistics transportation is mainly intercontinental ocean shipping and inland rail transportation. European ports have been very mature after years of development, such as Hamburg in Germany, Rotterdam in the Netherlands and Antwerp in Belgium. Relying on the huge market of the European Union, these ports are positioned in the logistics distribution function of cargo distribution and large import and export, and play a great role in the transportation of API standard 650 aboveground steel oil storage tanks steel logistics.
