Preface
This first edition of CSA Preliminary Standard B620, Highway Tanks and Portable Tanks for the Transportation of Dangerous Goods, replaces and supersedes Preliminary Standard B338, of the same title, published in 1982, and Supplement No. 1, published in 1984.
This Standard was prepared as a result of the Transportation of Dangerous Goods Act proclaimed by the Governor in Council in 1980, which authorized the Minister of Transport to develop a Code on the Transportation of Dangerous Goods consisting of regulations, standards, accepted practices, and information.
A CSA Committee was formed to develop a technical standard covering the design, construction, testing, inspection, retesting and certification of tanks for the transportation of dangerous goods. This Standard specifies requirements for highway tanks, portable and intermodal portable tanks, multi-unit tank car tanks, reinforced plastic (RP) highway tanks, and pressure/vacuum liquid waste highway tanks for the transportation of dangerous goods.
This Standard follows the CSA format and numbering system and incorporates appropriate sections of the US Code of Federal Regulations, Title 49, on tank specifications, which have been reproduced in this Standard in part or in whole with the permission of the Director of Hazardous Materials Regulations, US Department of Transport. Where tank specifications have been reproduced, the CFR paragraph system and identification has been retained, eg, §178.340-7, §178.343-8, etc, and where some parts have been modified or rewritten, such changes are summarized in Clause 4.4. This Standard differs from the first edition of CSA Standard B338 and Supplement No. 1 in that, along with editorial changes, it incorporates the requirements of Specifications TC 338 and TC 341 tanks and the registration of facilities to manufacture, repair, test, inspect, and certify such tanks.
It is the intent of the CSA Technical Committee to further develop this Standard in the future in cooperation with the industry representation and the regulatory authorities in Canada and the- USA to meet the needs' In Canada and to achieve a maximum degree of uniformity with the USA.
This Standard was prepared by the Technical Committee on Highway Tanks. Authorization to publish it as a Preliminary Standard was granted by the Standards Steering Committee on Materials Handling and Distribution.
Scope
1.1
This Standard applies to highway tanks and portable tanks used for the transportation of dangerous goods in bulk by road and for intermodal portable -tanks for the transportation of dangerous goods in bulk, other than by air. It covers the design, construction, certification, testing, inspection and retesting, maintenance, and identification of such tanks. Additional design and construction requirements for tanks intended to carry specific products are covered in the following CSA Standards:
B8621- Selection and Use of Highway Tanks, Portable Tanks, Cargo Compartments and Containers for the Transportation of Dangerous Goods, Classes 3, 4, 5, 6, and 8, in Bulk by Road;
B622 - Selection and Use of Highway Tanks Multi-unit Tank Car Tanks, and Portable Tanks for the Transportation of Dangerous Goods, Class 2, by Road;
B8623 - Selection, Handling, and Use of Intermodal Portable Tanks for the Transportation of Dangerous Goods, Other Than by Air.
1.2
Notwithstanding the provisions of this Standard, compliance with the provisions of the Transportation of Dangerous Goods Act of 1980 and the Regulations A thereto may call for additional requirements due to particular characteristics or properties of individual dangerous goods. The design, construction, testing or retesting of highway tanks (including those for dangerous wastes), portable tanks, intermodal portable tanks, or reinforced plastic (RP) highway tanks shall be in accordance with the requirements of this Standard and any additional requirements of the Transportation of Dangerous Goods Regulations.
1.3
This Standard is not intended to be a guide for the design and construction of tanks and as such does not obviate the need for exercising competent engineering judgement, nor does it eliminate the necessity for complete design calculations relating to the intended use of the tank. The values for the various parameters listed are simply the limiting values within which such tanks are restricted for this Standard. It is the responsibility of the tank manufacturer to select adequate values (of safety factor, tensile strength, etc) within these constraints, so that the tank will safely carry out its intended function.
