The first edition of PEI/RP600: Recommended Practices for Overfill Prevention for Shop- Fabricated Aboveground Tanks was published in response to a rash of accidents—some of
which were fatal. The document, a comprehensive
reference of material from manufacturers, installers, tank owners and regulators, was published
to prevent tank overfills and the loss of life and
equipment resulting from overfill incidents.
Originally published in 2007, PEI/RP600 has
just undergone its first revision—in keeping with
the five-year review cycle followed with all PEI
recommended practices. This schedule ensures
that each document is kept up to date with the
technological advances that inevitably occur in a
Last month, the PEI Journal sat down with Bob
Young, PEI director of industry relations, and Sonny
Underwood, chairman of the PEI Aboveground
Tank Overfill Prevention Committee, to discuss
the importance of this document, the challenges in
revising RP600 and the most significant changes
in this new edition.
5 8 | PEI.ORG | Second Quarter 2012
PEI Aboveground Tank
Overfill Prevention Committee
Mid-South Steel Products, Inc.
Cape Girardeau, Mo.
JOURNAL: What were the biggest challenges to
writing the original version of RP600 in 2007?
YOUNG: From a staff perspective, I think my biggest
challenge was helping the group agree on the different
processes and procedures that it takes to form a recommended practices document. As far as the substance
of the document itself—the installation and operation
of the equipment—we talked the most about freezing
emergency vents. In fact, that went to part of the reason
the document was written in the first place. On the very
first page, we have a picture of a tanker that caught fire
and burned to the ground as a result of a frozen vent
that didn’t release.
UNDERWOOD: I guess the one area that is still a point
of contention is whether these overfill devices need to
have some testability feature or not. That was discussed in
great length, and there is still some indecision out there
on whether or not you should be able to test them.