ISO 630 grade E355 plates API standard 650 self-anchored flat-bottom tanks

The hardness of the welds contacting these environments, including the heat-affected zones, shall be considered. The weld metal and adjacent heat-affected zone often contain a zone of hardness that is well in excess of a value of 22 on the Rockwell C scale and could be expected to be more susceptible to cracking than would unwelded metal. Any hardness criteria shall be a matter of agreement between the Purchaser and the API standard 650 self-anchored flat-bottom tanks manufacturer and shall be based on an evaluation of the expected hydrogen sulfide concentration in the product, the possibility of moisture being present on the inside metal surface, and the strength and hardness characteristics of base metal and weld metal.

The application of API 650 is as stated by the American Petroleum Institute: The production and installation of our ground welded steel API standard 650 self-anchored flat-bottom tanks storage tanks are generally used in industry; under normal circumstances, the storage tanks installed on the industrial site in the United States are in accordance with API 650, API 620 and API 12d Standards are established.

The preparatory work before the construction of the API standard 650 self-anchored flat-bottom tanks is directly related to the quality assurance, project progress, construction safety and other aspects of the entire oil tank project. Therefore, the preparation work before the API standard 650 self-anchored flat-bottom tanks construction should be paid attention to and planned. Before API standard 650 self-anchored flat-bottom tanks construction, you need to prepare conventional machinery, materials, and facilities, as well as the quality control of the project, such as the installation method of the API standard 650 self-anchored flat-bottom tanks, the welding method of the steel plate, and the inspection of the tank material. In addition, there is the most important item, construction safety protection.