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我国建造的石油液化气和其他介质的球形储罐约1500台左右,自1980年以来,每年大约以80台左右的数量进行现场制造,其中容积为400m~3的球罐约占总量的85%以上。这些球罐由于本身受球壳板压制、制造厂供板规格最大尺寸等条件的限制,绝大部分采用多带、多瓣、多板片拼装结构,其中最常见的球罐结构为五带八柱式结构,即球形储罐有北极、北温、赤道带、南温和南极带组成,采用八根圆截面管式支承柱承重。这类球罐的主要问题在于分带多、板片小,一台400m~3球罐板片竟达54块之多,最小板片仅为1350×850mm,重量仅有260 kg,这就给现场组装焊接带来了一系列
About 1,500 spherical storage tanks for liquefied petroleum gas and other media are built in our country. Since 1980, about 80 units have been manufactured on site every year. The volume of spherical tanks with a capacity of 400m3 accounts for 85% of the total %the above. These spherical tanks due to their own by the ball shell suppression, the manufacturer for the maximum size and other specifications for the board size restrictions, the vast majority of multi-band, multi-flap, multi-plate assembly structure, the most common structure of the tank for five with eight The column structure, spherical tank with North Pole, North Temperature, the equatorial belt, the South warm and the Antarctic belt composition, the use of eight circular cross-section tubular bearing column bearing. The main problem of this type of spherical tank is that there are many sub-zones and small plates. A single 400m ~ 3 spherical tank has as many as 54 plates, the minimum plate is only 1350 × 850mm and weighs only 260 kg, which gives Site assembly welding has brought a series