前言:这是CSA B621的第六版，3、4、5、6.1、8和9类危险品运输用公路储罐、TC移动式储罐和其他大型容器的选择和使用。它取代了2014年、2009年、2003年、1998年和1987年出版的之前版本。该版本的主要变化包括:非矩形TC 44不再仅限于柴油。它们可用于运输其他危险品，类似于TC 406和同等储罐；修订了带有中间舱壁的储罐的要求； 手动远程关闭装置的紧急关闭标记要求；使用止动块以防止车辆意外移动时，至少需要两个止动块；根据联合国编号对危险品表进行了修订。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。本标准的制定充分考虑了北美当前的行业惯例、美国联邦法规第49篇和联合国出版物《危险货物运输建议:示范法规》。CSA B620:20《危险品运输用公路储罐和TC移动式储罐》是设计、施工、测试和检验要求的参考文件。 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本标准详细说明了公路储罐、TC移动式储罐和其他大型容器作为3、4、5、6.1、8类危险品运输的主要容器时的选择和使用、搬运、填充和卸载要求，9.1.2本标准规定了选择适当的危险品运输容器的最低要求。 然而，本标准并未规定安全壳结构材料的选择，以确保与危险品的化学相容性。因此，有必要结合本标准进行合格的技术和工程判断。1.3如果本标准的任何要求不同于《危险货物运输（TDG）条例》，则适用《危险货物运输（TDG）条例》的要求。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。1.4本标准不适用于TC 56、CTC 56和DOT 56储罐。CAN/CGSB-43.146中提供了这些储罐的要求。（见第6.4条）1.5本标准不适用于TC 57、CTC 57和DOT 57储罐。CAN/CGSB-43.146中提供了这些储罐的要求。（见第6.5条）1.6本标准不适用于TC 106、TC 110、CTC 106、CTC110、DOT 106、DOT110、ICC106和ICC110储罐。TP14877中提供了这些储罐的要求。 （见第6.6条）1.7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。1.8国际单位制给出的数值为本标准中的记录单位。括号中给出的值仅供参考和比较。注:除非另有说明，否则压力单位指表压。

Preface:This is the sixth edition of CSA B621,Selection and use of highway tanks, TC portable tanks, and other large containers for the transportation of dangerous goods, Classes 3, 4, 5, 6.1, 8, and 9. It supersedes the previous editions published in 2014, 2009, 2003, 1998, and 1987.The major changes to this edition include the following:non-rectangular TC 44 are no longer limited to diesel fuel only. They are permitted for the transport of other dangerous goods, similar to TC 406 and equivalent tanks;revised requirements for tanks with an intermediate bulkhead;emergency shutoff marking requirements for manually activated remote shutoff device;minimum two chock blocks required when using chock blocks to prevent unintended vehicle movement; andrevised dangerous goods table sorted by UN number.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 was prepared giving due consideration to current industry practices in North America, theUS Code of Federal Regulations, Title 49, and the United Nations publicationRecommendations on the Transport of Dangerous Goods: Model Regulations. CSA B620:20,Highway tanks and TC portable tanks for the transportation of dangerous goods, is the reference document for design, construction, testing, and inspection requirements.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 details the requirements for the selection and use, handling, filling, and unloading of highway tanks, TC portable tanks, and other large containers when they are used as a primary means of containment for the transportation of dangerous goods of Classes 3, 4, 5, 6.1, 8, and 9.1.2This Standard sets out certain minimum requirements for the selection of the appropriate means of containment for the transportation of dangerous goods. This Standard does not, however, prescribe selection of the materials of construction of the means of containment to ensure chemical compatibility with the dangerous goods. Consequently, it is essential to exercise competent technical and engineering judgment in conjunction with this Standard.1.3Where any requirement of this Standard differs from theTransportation of Dangerous Goods (TDG) Regulations, the requirements of theTDG Regulationsapply. 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.1.4This Standard does not apply to TC 56, CTC 56, and DOT 56 tanks. Requirements for these tanks are provided in CAN/CGSB-43.146. (See Clause 6.4.)1.5This Standard does not apply to TC 57, CTC 57, and DOT 57 tanks. Requirements for these tanks are provided in CAN/CGSB-43.146. (See Clause 6.5.)1.6This Standard does not apply to TC 106, TC 110, CTC 106, CTC110, DOT 106, DOT110, ICC106, and ICC110 tanks. Requirements for these tanks are provided in TP14877. (See Clause 6.6.)1.7In 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; 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.1.8The values given in SI units are the units of record for the purposes of this Standard. The values given in parentheses are for information and comparison only.Note:Units for pressure refer to gauge pressure unless otherwise noted.