ISO 20421-1:2006规定了体积大于450 l的大型可运输真空绝热低温容器的设计、制造、检查和测试要求，这些容器永久（固定罐）或非永久（可拆卸罐和移动罐）连接到运输工具上，用于一种或多种运输方式。 ISO 20421-1:2006适用于用于低温流体的大型可运输真空绝热低温容器，不适用于用于有毒流体的容器。 ISO 20421-1:2006不包括符合相关标准/法规的一般车辆要求，例如传动装置、制动器、照明等。

ISO 20421-1:2006 specifies requirements for the design, fabrication, inspection and testing of large transportable vacuum insulated cryogenic vessels of more than 450 l volume, which are permanently (fixed tanks) or not permanently (demountable tanks and portable tanks) attached to a means of transport, for one or more modes of transport. ISO 20421-1:2006 applies to large transportable vacuum insulated cryogenic vessels for cryogenic fluids, and does not apply to vessels designed for toxic fluids. ISO 20421-1:2006 does not include the general vehicle requirements, e.g. running gear, brakes, lighting, etc., which are in accordance with the relevant standards/regulations.