Question: This question relates to food grade ISO tanks. “Are food grade tanks exempt from hydro test, and are only leak tests required?”
Tank Guru: This is an area of confusion for many people. It always comes back to the product being shipped. Since most edible products are non-hazardous, then a specification packaging is not required. However, in the case of a tank container, then of course the requirements for CSC Safety Approval have to be met for the ‘container’ even if the tank itself is a non-Code vessel. BUT, if shipping the non-hazardous material in a spec packaging such as an IMO 1, IMO 2, or UN Portable Tank; then the certifications (and associated testing requirements) should be maintained, or else the tank should be down-graded to a non-spec packaging. In the case of a non-spec tank, obviously there would be no requirement for a hydro test.
Keep in mind that some food grade products are still considered hazmat (certain alcoholic beverages might ship as a Class 3 flammable liquid, for instance); and in that case one would need to refer to the MSDS for details on the authorized packagings.