How is the opening strength of the tank roof calculated?
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The diameter of the oil tank is 21,000, and the radius of the vault is 21,110. If there is an opening, how is the strength calculated? What is the difference between the dome of an oil tank and the hemispherical head of a pressure vessel? In SW6, for spherical domes, the ratio of the spherical radius to the inner diameter of the cylinder is required to be between 0.7 and 1.0, whereas for the roofs of oil tanks, this ratio is between 0.8 and 1.2.
For storage tanks designed in accordance with GB50341, the reinforcement rings at the tank top openings do not need to be calculated! Using the equal-area method for reinforcement calculations, everything can pass!
Are there any more experts? Some guidance, please! Thank you!
Just use GB50341 for calculations; only when the operating parameters exceed this standard should SW6 be applied. Why try to combine the two systems? GB50341 is based on API650； GB150 is derived from ASME VIII-1; theirs is also separated
Calculate in accordance with GB50341.
It seems that reinforcement for the openings isn’t required under this standard; only those with a diameter of DN150 or more need reinforcement rings. Anything else?
This post was last edited by wanlirn on 2019-10-25 at 11:36. Your thinking is so messy; let me sort it out for you. The diameter of the oil tank is 21,000, and the radius of the vault is 21,110. If there is an opening, how is the strength calculated? ——For oil tanks, follow the requirements specified in GB50341 ； What is the difference between the dome of an oil tank and the hemispherical head of a pressure vessel? Oil tanks have their own standard system, GB50341, while container domes have their own standard system, GB150. According to SW6, for dome-shaped heads the ratio of the spherical radius to the inner diameter of the cylinder should be between 0.7 and 1.0, whereas for oil tank roofs the ratio of the dome height to the tank diameter should be between 0.8 and 1.2 – as stated in the second question
The equal-area method is used for calculations related to opening reinforcements; since the pressure on the top of the tank is low and there is no static pressure, such calculations are sufficient. Generally, no calculations are needed when openings are made in storage tanks and reinforcement rings are added