Question: This question relates to ISO tank inspection. “Is there a grace period on the 2.5 year test?”
Tank Guru: Yes there is a grace period of 90 days on ISO tank inspection before or after the test due-date for the 2.5-year periodic test. For instance, if the last 5-year hydro test was performed in Jun-2008 and the 2.5-year test should have been performed in Dec-2010, you still have until Mar-2011 to carry out the periodic test. This does not change the next test due-date, which will still be Jun-2013 (5 years after the last hydro test). If the 2.5-year test is not carried out by Mar-2011, then you would have to perform a full 5-year test to get the tank back into compliance. Thanks for a great question.
For more information: 49 CFR 180.407 – Requirements for test and inspection of specification cargo tanks