NFPA 58: A Preview of Proposed Changes for 2020

Blog Post created by aing Employee on May 10, 2019

Some significant changes are on the horizon for NFPA 58, Liquefied Petroleum Gas Code. Although the changes that have been proposed so far in the code development process are not groundbreaking, they are worthy of your attention if the work you do is impacted by the requirements in this code.

One big change is still to be decided at an upcoming event. At the 2019 NFPA Technical Meeting in June, the 2020 edition of NFPA 58 will be up for any Certified Amending Motions (CAMs). This will be the second-to-last chance for any changes to be made to the document before it is issued by the NFPA Standards Council.

There is only one CAM on NFPA 58 and it’s on purging pipe systems to atmosphere. At the first draft meeting, the committee elected to change the procedures from what they are currently in the 2017 edition to the first draft language. This new language would require pipe purging of systems designed for 125 psig or less to be done in accordance with the requirements in NFPA 54, National Fuel Gas Code, and any systems of greater than 125 psig to be purged in accordance with NFPA 56, Standard for Fire and Explosion Prevention During Cleaning and Purging of Flammable Gas Piping Systems. The committee, however, at second draft changed the language to state that regardless of system operating pressure, the procedures of NFPA 54 must be followed. The CAM is looking to reject this change and send the document back to the same first draft language. What happens to the document next is up to the general body at the Technical Meeting.

There are a number of other changes that have happened to NFPA 58 that are almost finalized and are covered below. While none of these changes are groundbreaking for NFPA 58, they are significant enough to call out.

  • Chapter 12, which covers over-the-road motor vehicles fueled by LP-Gas, has been reorganized and revised to be more user-friendly.
  • Chapter 15, which covers operations and maintenance (O&M), has also been revised to be more user-friendly. Specifically, Chapter 15 has been revised to call out more O&M requirements in NFPA 58 rather than installation requirements as in previous editions. More importantly, Chapter 15 now excludes pipelines under the jurisdiction of the US Department of Transportation, as their O&M requirements are more stringent than the requirements of NFPA 58.
  • LP-Gas cylinders that are equipped with CGA 791 and CGA 793 connections are now required to have their valve face seal inspected before filling can occur, because it is possible that over time the face seal can become damaged from exposure to the weather or misuse. If any defects are found, then the cylinder is not permitted to be filled.
  • Fire extinguisher requirements in the 2017 edition were reorganized to be centrally located in Chapter 4. The 2020 edition has further revised the fire extinguisher requirements in order to bring them more in line with industry standards such as NFPA 10, Standard for Portable Fire Extinguishers. Doing so allows the user to select the most appropriate fire extinguisher for the type of fire they are anticipating to fight.

These changes are only some, but not all, of the upcoming revisions to the 2020 edition of NFPA 58. For a more detailed list, visit for a revisions fact sheet and information on how to get involved in the next cycle of NFPA 58.