API 650 cylindrical welded storage tanks hydrostatic testing requirements

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To determine the length of the nozzle neck within the limits of reinforcement, the smaller of the following calculated values shall be used:(2.5)(0.625) = 1.56 in.
(2.5)(0.375) + 0.75 = 1.69 in.Corrosion allowance, if specified, shall be added to calculated API 650 tanks shell and self-supporting roof thicknesses; to minimum nominal thicknesses of bottom and supported API 650 cylindrical welded storage tanks roof plates; to nozzles and manholes; and to all exposed surfaces of internal structural members and non-removable internalsTraining is one of the important factors in the construction of corporate culture Online training system can be used to enable all employees to take advantage of fragmented time and carry out targeted training anytime and anywhere without the limitation of time and region Through training to improve work skills, at the same time, through training, let all improve their quality education level, let employees work around a goal, create a career, and produce results,API 650 cylindrical welded storage tanks., Oil tank is a large-scale storage equipment used to store oil materials. Usually, the service life of API 650 cylindrical welded storage tanks is related to the actual working conditions. The design service life of most oil tanks is 20 years, and some of them are 10-15 years. Generally, none of them is less than 10 years. However, the design service life of API 650 cylindrical welded storage tanks is on the one hand, which is an ideal state, but there are many objective factors in the actual process, it is impossible to achieve the designed service life. How to effectively increase the service life of API 650 cylindrical welded storage tanks?