CSA B621:20

1 Scope 1.1 This 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. 1.2 This 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. 1.3 Where any requirement of this Standard differs from the Transportation of Dangerous Goods (TDG) Regulations, the requirements of the TDG Regulations apply. Where there is an inconsistency between this Standard and a referenced publication other than the TDG Act or Regulations, 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. 1.4 This 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.) 1.5 This 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.) 1.6 This 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.)