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液态乙烯一般可分为高压(2MPa～2.9MPa)低温(-29～-31℃)储存及低压(0.07MPa)超低温(-104℃)储存。根据这两种不同的储存条件选择不同的建罐材料很有经济价值。目前,国外已有这方面设计选材的标准规范。9%Ni 钢强度高,在低温条件下有良好的韧性,国外用于建造超低温(<-104℃)储罐,已有了不少成功经验,国内尚在摸索阶段。国内现役的乙烯球罐一部分是用9%Ni 钢制造的,另一部分则是用490MPa 级低温高强钢,均在高压低温条件下运行,从运行情况和开罐检查的结果来看,对于储存高压低温的液态乙烯球罐,采用优质低温高强钢比较经济合理,而用9%Ni 钢就有些浪费了。
Liquid ethylene can be divided into high pressure (-2MPa ~ 2.9MPa) low temperature (-29 ~ -31 ℃) storage and low pressure (0.07MPa) ultra-low temperature (-104 ℃) storage. It is of economic value to choose different materials for tank construction based on these two different storage conditions. At present, foreign countries have this standard design specifications. 9% Ni steel has high strength and good ductility under low temperature. Many overseas successful experiences have been obtained for building ultra-low temperature (<-104 ℃) tanks abroad, and the domestic trial is still under way. Domestic service of the part of the 9-Ni alloy steel dome is made of Ni, the other part is the use of 490MPa-class low-temperature high-strength steel, are under high pressure and low temperature conditions, operating conditions and open canning inspection results from the point of view, Low-temperature liquid vinyl spheres, the use of high-quality low-temperature high-strength steel more economical and rational, but with 9% Ni steel to some waste.