MC 331
For MC 331, test or inspection is Pressure Test; interval is 10 years; condition or service qualifier is less than 3,500 gallons water capacity in dedicated propane service constructed of nonquenched and tempered NQT SA-612 steel; regulation section is 49 CFR § 180.407, recorded from its source on 2026-08-10.
- Container specification
- MC 331 verified
- Test or inspection
- Pressure Test our reading
- Interval
- 10 years. verified
- Condition or service qualifier
- less than 3,500 gallons water capacity in dedicated propane service constructed of nonquenched and tempered NQT SA-612 steel verified
- Regulation section
- 49 CFR § 180.407 verified
Values marked our reading are our classification of what the source says — the source does not print them in those words. The quote below is the evidence for each one; judge it yourself.
What the source says
MC 331 cargo tanks less than 3,500 gallons water capacity in dedicated propane service constructed of nonquenched and tempered NQT SA-612 steel (See Note 5) | | 10 years.
— law.cornell.edu, retrieved 2026-08-10
Source
- law.cornell.eduhttps://www.law.cornell.edu/cfr/text/49/180.407