前言:这是CSA B620第六版，用于运输危险品的公路储罐和TC移动式储罐。它取代了2014年、2009年、2003年、1998年和1987年出版的之前版本。本标准规定了危险品运输用公路储罐、移动式储罐、纤维增强塑料（FRP）公路储罐和压力/真空液体废物公路储罐的要求。它还规定了用于装载或卸载危险品的软管组件的要求。本版本的主要变化包括:更新的美国机械工程师学会（ASME）规范参考；新培训机构储罐检验人员和储罐测试人员资格注册；更新了储罐检查员和测试人员的培训和资格要求； 修订了所有公路储罐的储罐固定要求；修订了TC 331、TC 338和TC 341油箱的损坏保护要求；用于运输UN1978（丙烷）的专用丙烷设施中的某些较小储罐的10年内部检查和压力试验频率，最大容量为13250 L；压力测试的新压力表选择和校准要求；修订厚度测试要求；修订压力测试要求；修订检验和试验报告要求；重新引入TC 51移动式罐，并更新要求；并修订了TC 423储罐的绝缘要求。CSA技术委员会的目的是进一步发展该标准- 与加拿大和美国的行业代表和监管机构合作，以满足加拿大的需求，并实现与美国最大程度的一致性。本标准是为配合《危险货物运输条例》使用而制定的一系列标准之一。应注意的是，除非监管机构正式采纳，否则本标准本身不具有法律效力。由于本标准可能会被纳入法规，但有某些例外情况或附加要求，因此建议参考相关司法管辖区的法规，以确定本标准已被采用的程度。 如果行业惯例不同于本标准的要求，可向监管机构申请同等安全等级的许可证。本标准的制定符合加拿大标准委员会对加拿大国家标准的要求。CSA集团已将其作为加拿大国家标准发布。范围:1.1本标准适用于主要通过公路运输危险品的储罐，而非中间散装集装箱和管道。它考虑此类储罐的设计、建造、认证、组装、修改、维修、测试、检查和定期重新测试、维护和识别。本标准也适用于用于装载或卸载危险品的软管组件。 CSA B621、CSA B622、CSA B626、，CAN/CGSB-43.151.1.2《危险品运输（TDG）法》和《危险品运输条例》可规定由于个别危险品的特殊特性或特性而附加于或不同于本标准的要求。如果本标准的要求与行业法规的要求不一致，则以行业法规的要求为准。如果本标准与DG Actor Regulations以外的参考出版物之间存在不一致，则以本标准的要求为准。 只有在仔细考虑本标准对该特定出版物的引用后，才能应用参考出版物。1.3本标准的使用不会减少考虑储罐预期用途的合格工程判断或完整设计计算的必要性。本标准中的各种参数值是储罐的限制值。储罐制造商有责任确保储罐在这些限制条件下安全执行其预期功能。1.4在本标准中，“应”用于表示要求，即用户为遵守本标准而有义务满足的规定； “应该”用于表示建议或建议但不需要的建议；“可”用于表示一种选择或在标准范围内允许的选择；“can”用来表示可能性或能力。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。1.5以SI（公制）单位给出的值为标准值。括号中给出的值仅供参考。 除非另有说明，否则压力单位指表压。

Preface:This is the sixth edition of CSA B620,Highway tanks and TC portable tanks for the transportation of dangerous goods. It supersedes the previous editions published in 2014, 2009, 2003, 1998, and 1987.This Standard specifies requirements for highway tanks, portable tanks, fibre-reinforced plastic (FRP) highway tanks, and pressure/vacuum liquid waste highway tanks for the transportation of dangerous goods. It also specifies requirements for hose assemblies used to load or unload dangerous goods.The major changes to this edition include the following:updated American Society of Mechanical Engineers (ASME) code references;new training organization registration for qualification of tank inspectors and tank testers;updated tank inspector and tester training and qualification requirements;revised tank securement requirements for all highway tanks;revised damage protection requirements for TC 331, TC 338, and TC 341 tanks;10 year internal inspection and pressure test frequency permitted for certain, smaller tanks in dedicated propane service with maximum capacity of 13250 L, used to transport UN1978 (propane);new pressure gauge selection and calibration requirements for pressure tests;revised thickness testing requirements;revised pressure testing requirements;revised inspection and test reporting requirements;reintroduction of TC 51 portable tanks, with updated requirements; andrevised insulation requirements for TC 423 tanks.It is the intent of the CSA Technical Committee to further develop this Standard in co-operation with industry representation and regulatory authorities in Canada and the United States to meet the needs of Canada and to achieve a maximum degree of uniformity with the United States.This Standard is one of a series of Standards that have been prepared for use in conjunction with theTransportation of Dangerous Goods Regulations. It should be noted that this Standard, by itself, does not have the force of law unless it is officially adopted by a regulatory authority. Since the Standard may be adopted into regulations with certain exceptions or additional requirements, it is recommended that the regulations of the relevant jurisdiction be consulted in order to establish the extent to which this Standard has been adopted. Where an industry practice differs from the requirements of this Standard, an application for a permit for equivalent level of safety may be requested from the regulatory authority.This Standard has been developed in compliance with Standards Council of Canada requirements for National Standards of Canada. It has been published as a National Standard of Canada by CSA Group.Scope:1.1This Standard applies to tanks, other than intermediate bulk containers and tubes, used for the transportation of dangerous goods primarily by road. It considers the design, construction, certification, assembly, modification, repair, testing, inspection and periodic retesting, maintenance, and identification of such tanks. This Standard also applies to the hose assemblies used to load or unload dangerous goods.Additional design and construction requirements for tanks intended to carry specific products are provided in CSA B621, CSA B622, CSA B626, and CAN/CGSB-43.151.1.2TheTransportation of Dangerous Goods (TDG) Actand theTransportation of Dangerous Goods Regulationscan set out requirements that are additional to or different from those in this Standard due to particular characteristics or properties of individual dangerous goods. Where there is an inconsistency between the requirements of this Standard and those of theActorRegulations, theActorRegulationsprevail to the extent of the inconsistency. Where there is an inconsistency between this Standard and a referenced publication other than theTDG ActorRegulations, the requirements of this Standard prevail. Application of a referenced publication should be made only with careful consideration of this Standard's reference to that particular publication.1.3The use of this Standard does not reduce the necessity for competent engineering judgment or complete design calculations that take into account the intended use of the tank. The values of the various parameters in this Standard are the limiting values to which the tank is restricted. It is the responsibility of the tank manufacturer to ensure that the tank will safely carry out its intended function within these constraints.1.4In this Standard, "shall" is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the standard; "should" is used to express a recommendation or that which is advised but not required; "may" is used to express an option or that which is permissible within the limits of the standard; and "can" is used to express possibility or capability. 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.1.5The values given in SI (metric) units are the standard. The values given in parentheses are for information only. Units for pressure refer to gauge pressure unless otherwise noted.