NFPA 58 Requirements
The 2011 edition of NFPA 58 made several significant changes regarding the installation of underground LP-Gas storage containers.
This affects all installations done during and after 2011. These changes affect how we test and monitor cathodic protection systems as follows:
ASME containers installed underground, partially underground, or as a mounded installations shall incorporate provisions for cathodic protection and be properly coated.
[5.2.1.11 Pg 13]
Corrosion protection systems shall be installed on new installations and include the following:
Proper container coating
Sacrificial anode(s) or an impressed current system
A means to test the performance of the cathodic protection system
[6.6.6.1I Pg 35]
Cathodic protection systems shall be monitored by testing and the results documented.
[6.6.6.1J Pg 35]
Unless the local Authority Having Jurisdiction (AHJ) specifies shorter intervals, sacrificial anodes installed shall be tested in accordance with the following schedule:
At time of their installation
12 to 18 months after the initial test (installation)
Follow-up testing performed at intervals not to exceed 36 months
[6.6.6.1K (1)-(3) Pg 35]
Systems failing a test shall be repaired as soon as practical and the testing schedule will be restarted.
[6.6.6.1K (4) Pg 35]
Documentation of the results of the two most recent tests shall be retained.
[6.6.6.1K (5) Pg 35]
NFPA 58 further states in the 2014 Edition that containers shall be filled only after determination that they comply with design, fabrication, inspection, marking, and requalification provisions of this code.
[7.2.2.8]
And a container shall not be filled if the container is not suitable for continues service.
[7.2.2.13]
The reference sections and pages may be different depending on the Edition of NFPA 58.
What this means is that you can’t have your tanks filled unless it has been tested for cathodic protection, had passing results and can produce the documentation proving this. Otherwise you are not in compliance with the National Fire Code. This could result in fines or worse. A leaking tank will cause you to lose gas. This gas could migrate to the crawl space and into the house. This could create a dangerous situation for you and your family. If you did have a fire or explosion your insurance company may ask for documentation showing your tank protection results. For many reasons you should have your tanks tested and kept up to code. We can help.
