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常压下的液化天然气(以下简称LNG)其密度为标准状态下甲烷的600多倍,将天然气转化为LNG后再运输,比常规的CNG(压缩天然气)运输量要高出很多倍。因此运输LNG的半挂车近几年得到很大应用,也得到很大发展。为了更加了解此种车型,现对此车型的结构以及管路工艺流程加以说明。1主要结构形式现以国产L N G三轴运输半挂车为例加以说明。1.1选材及要求罐车主要按JB/T4783—2007《低温液体汽车罐车》进行设计,罐体部分采用金属内、外筒加高真空多层绝热结构。由于LNG的低温特性,罐车内容器及
At atmospheric pressure, liquefied natural gas (hereinafter referred to as LNG) has a density of 600 times that of methane as standard and converts the natural gas into LNG before it is transported, which is many times higher than conventional CNG (Compressed Natural Gas) transportation. Therefore, the transport of LNG semi-trailer has been greatly applied in recent years, have also been greatly developed. In order to better understand this type of car, now the structure of the car and pipeline process to be described. 1 The main structure is now made of domestic LNG three-axle transport trailer as an example to illustrate. 1.1 Selection of materials and requirements Tanker mainly by JB / T4783-2007 “cryogenic liquid tanker” design, tank part of the metal, the outer tube plus high vacuum multi-layer insulation structure. Due to the low temperature characteristics of LNG, tanks and containers inside