This publication establishes guidelines for the removal of insulation and the inspection of the vessel exterior on foam insulated carbon steel MC-331 carbon dioxide and nitrous oxide tank trailers.
It is recommended that any time a trailer is reinsulated, the pressure vessel be inspected for corrosion so problems can be identified, prevented, and/or repaired before the shell thickness is less than the minimum required thickness.
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CSA B55.1-12
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CSA S850-12 (R2022)
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CSA Z7396.1-12
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CGA G-5.4
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