立式(shi)常(chang)壓香蕉視頻app連接:儲罐由基(ji)礎、罐(guan)(guan)(guan)(guan)底、罐(guan)(guan)(guan)(guan)壁(bi)、罐(guan)(guan)(guan)(guan)頂(ding)(ding)及附件組成。按(an)罐(guan)(guan)(guan)(guan)頂(ding)(ding)的(de)結(jie)構不同(tong)(tong)可分為(wei)拱(gong)頂(ding)(ding)罐(guan)(guan)(guan)(guan)、浮頂(ding)(ding)罐(guan)(guan)(guan)(guan)和內(nei)浮頂(ding)(ding)罐(guan)(guan)(guan)(guan)。不同(tong)(tong)的(de)罐(guan)(guan)(guan)(guan)類別和結(jie)構的(de)配管設計要(yao)求各不相(xiang)同(tong)(tong)。
拱頂罐系指罐頂為球冠狀、罐體為圓筒形的一種容器，其容積可達20000m3，其結構一般只有自支承拱頂一種。自支承拱頂又可分為無加強肋拱頂（容量小于1000m3）、有加強肋拱頂（容量大于1000～20000m3）。拱頂圓弧R=(0.8~1.2)～1.2）D，它可承受較高的剩余壓力，蒸發損耗較少，拱頂罐與錐頂罐相比耗鋼量少但罐頂氣體空間較大，拱頂罐除罐頂板的制作較復雜（需用胎具壓制拱形）外，其他部位的制作較易，造價較低，是國內外廣泛采用的一種儲罐。
罐(guan)(guan)壁是主要受力(li)部(bu)件，壁板的各縱焊縫(feng)采(cai)用(yong)對(dui)接焊，環焊縫(feng)采(cai)用(yong)套筒式(shi)或對(dui)接式(shi)，也有(you)采(cai)用(yong)混合式(shi)連接，如圖(tu)12.2所示(shi)。拱(gong)頂罐(guan)(guan)的罐(guan)(guan)頂近似于球面(mian)，按截面(mian)形(xing)狀有(you)準球形(xing)拱(gong)頂和球形(xing)拱(gong)頂兩種(zhong)，見(jian)圖(tu)12.3。拱(gong)頂油(you)罐(guan)由于氣相空間大，油(you)品蒸發損(sun)耗大，故不宜儲存輕質油(you)品和原油(you)，宜儲存低揮發性及重質油(you)品。
