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一、前言日本国内的现状是低温液化天然气船的生产已经十几年了,但流体温度为-162℃的液化天然气船的生产却非常少。由于安装在液化天然气船的管路上的波纹管伸缩接头是在上述的-162℃这种超低温状态下工作,需要吸收船所特有的位移和振动,以及万一产生裂纹而漏气时有外(火卜)炸的危险等,所以不能和安装在普通管路上的波纹管伸缩接头用同一个标准。为此,必须对材料的选择,结构的研究及设计规格等方面都进行充分的研究。至于试验和检验,各船级社已有规定。作者曾经根据船舶舾装委员会安全基准委员会第八分会提出的关于液化天然气船用波纹
I. Preface The status quo in Japan is that the production of cryogenic LNG carriers has been more than ten years. However, the production of liquefied natural gas vessels with fluid temperature of -162 ° C is very small. Since the bellows expansion joint installed on the pipeline of a LNG carrier operates under the extremely low temperature of -162 ° C as described above, it is necessary to absorb the ship-specific displacement and vibration as well as in case of leakage Fire BU) the risk of frying, etc., and therefore can not be installed on the ordinary pipe bellows expansion joints with the same standard. To this end, we must fully study the material selection, structural studies and design specifications. As for testing and inspection, all classification societies have provisions. The author has been based on the ship outfit Commission Safety Benchmarks Chapter VIII proposed liquefied natural gas ship corrugated