What is likely happening
Without a data plate nobody can confirm the vessel's design pressure, so it cannot be safely rated or certified. Older or used tanks are the most common cases.
What you can safely check
- Look for stamped numbers on the shell or a National Board number.
- Find any purchase records or manufacturer paperwork.
What an inspector will look at
- Identification and registration
- Condition assessment
- Whether it can be re-rated or must be replaced
Does this affect compliance?
Regulated vessels generally must be identifiable and registered; an unidentified vessel is usually a compliance problem.
When it becomes urgent
More urgent if the tank is in service at high pressure.
We can help with this
Pressure vessel inspection is something Insparisk does nationwide. To see the local rules for your building, open this in the interactive Problem Solver.
Request pressure vessel inspectionTalk to an advisorGeneral guidance only, not a substitute for a licensed inspection or emergency services. For any gas odor, carbon monoxide alarm, fire, or trapped occupant, call 911 first.