API 650 low-alloy steel tanks welding requirements
Temperature Range: The provisions in this appendix are considered suitable for API 650 low-alloy steel tanks design metal temperatures from + 40°F to –60°F, inclusive. In general, refrigerated tank primary components include those components whose failure would result in leakage of the liquid being stored, those exposed to the refrigerated temperature, and those subject to thermal shock. Further definitions of such components are provided in API Standard 620 tank R.1.4.2 and R.1.4.3.
Compared with the fixed roof API 650 oil storage tank without API 650 low-alloy steel tanks floating roof, there is no evaporation space. In principle, this eliminates the so-called "large breathing loss". Evaporation not only causes the loss of product quantity, but also affects the quality of API 650 low-alloy steel tanks product and pollutes the environment.
In April 2018, our Philiphine customer purchased 1008 Tons API5 L Gr.B ERW&Q345B SMLS pipe API 650 low-alloy steel tanks for offshore oildfield resources drilling project. This is a regular demand almost two month, and we has been cooperated more than three times, totally around 2100 tons steel pipe since 2015 year.
}The preparatory work before the construction of the API 650 low-alloy steel 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 650 low-alloy steel tanks construction should be paid attention to and planned. Before API 650 low-alloy steel 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 650 low-alloy steel 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.
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