前言这是CSA LNG 2液化天然气汽车集装箱的第一版。范围1。1概述本标准包含了仅用于储存中重型车辆运行的液化天然气的连续生产、可再充装容器的材料、设计、标记和测试的性能要求。1.2结构或材料任何结构或材料可满足与结构或材料有关的所有规范，这些结构或材料至少能提供本文规定的同等性能水平。目前的液化天然气储罐技术包括一个由奥氏体不锈钢制成的双壁容器，其中内部容器容纳液化天然气，外部容器提供绝缘和环境保护。 可能需要进行额外的试验，以评估与本标准未具体说明的新结构或材料相关的潜在失效模式。1.3计量单位本标准包含与SI（公制）单位相对应的码/磅数量，目的是允许在码/磅数量中使用标准。IEEE/ASTM SI 10，美国国家公制实践标准，或ISO 80000-1:2009数量和单位%u2014第1部分:概述，用作从码/磅数量进行公制转换的指南。）如果规定了测量值和其他单位的相应值，则应将第一个规定值视为要求。 给定的相应值可能是近似值。如果测量值和其他单位的相应值都被规定为引用标记要求，则应提供第一个规定的单位或两者。1.4表压除非另有规定，本标准中所有提及的“psi”均应视为表压。1.5本标准中的术语“应”用于表示要求，即用户为遵守本标准而应满足的规定；“应该”用于表示建议或建议但不需要的建议；“可”用于表示一个选项或在标准范围内允许的选项。 注释随附条款不包括要求或替代要求；随附条款的注释的目的是将解释性或信息性材料与文本分开。表和图的注释被视为表或图的一部分，可以作为要求编写。附件被指定为规范性（强制性）或信息性（非强制性）以定义其应用。

PrefaceThis is the first edition of CSA LNG 2, Liquefied natural gas vehicle containers.Scope1.1 GeneralThis Standard contains performance requirements for the material, design, marking, and testing of serially produced, refillable containers intended only for the storage of liquefied natural gas for medium- and heavy-duty vehicle operation.1.2 Construction or materialsAll specifications as to construction or materials may be satisfied by any construction or materials that will provide at least the equivalent level of performance set forth herein. The current technology for LNG tanks consists of a double walled vessel built of austenitic stainless steel, where the inner vessel holds the LNG and the outer vessel provides insulation and protection from the environment. Additional tests may be required to evaluate potential failure modes that pertain to the new construction or materials that are not specifically addressed in this Standard.1.3 Units of measureThis Standards contains yard/pound quantities corresponding to the SI (metric) units, the purpose being to allow the Standard to be used in yard/pound quantities. IEEE/ASTM SI 10, American National Standard for Metric Practice, or ISO 80000-1:2009 Quantities and units %u2014 Part 1: General, is used as a guide in making metric conversion from yard/pound quantities.) If a value for a measurement and a corresponding value in other units are stated, the first stated value is to be regarded as the requirement. The given corresponding value may be approximate. If a value for a measurement and a corresponding value in other units, are both specified as a quoted marking requirement, the first stated unit, or both are to be provided.1.4 Gauge pressureAll references to "psi" throughout this Standard are to be considered gauge pressures, unless otherwise specified.1.5 TerminologyIn this Standard, "shall" is used to express a requirement, i.e., a provision that the user shall satisfy in order to comply with the standard; "should" is used to express a recommendation or that which is advised but not required; and "may" is used to express an option or that which is permissible within the limits of the Standard.Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material.Notes to tables and figures are considered part of the table or figure and may be written as requirements.Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application.