of the issues they entail. And the codes don’t
cover shutoffs in the compressor compound at
all. Our committee filled in those gaps.
MOREAU: Other important topics not
addressed by code are how to bend tubing,
operation and maintenance standards, when
and why you should have an enclosure,
and how to build enclosures—whether in
the shop or in the field. RP1500 discusses
all of these topics. In other cases, we made
recommendations that went beyond those set
by the codes or clarified apparent conflicts. For
example, the codes appear to allow classified
areas to go onto a neighbor’s property.
obviously doesn’t make sense, so the
committee tried to integrate classified areas
with property-setback requirements. Also,
while NFPA 30A applies only to facilities
offering both liquid and gaseous fuels, RP1500
had to address CNG-only facilities as well.
JOURNAL: How educated will PEI
members be on CNG fueling systems after
reading this document?
MOREAU: First of all, simply reading
RP1500 won’t be enough. You have to study
the document carefully to grasp everything
that is in there. When you do, you’ll have a
pretty thorough understanding of the basics
of CNG fueling systems, including the nature
and function of the various components,
how different types of systems work, and how
vehicles are fueled with CNG. You’ll be
equipped to speak intelligently about CNG
fueling systems to engineers, owners and
CNG equipment manufacturers.
Taking the time to study and understand
RP1500 is a great starting point for someone
who wants to get into CNG fueling station
work. If you have the electronic version of
the document, that’s even better because the
electronic format is searchable—you can
easily find whatever word, topic or component
The components of a CNG fueling facility--such as the compressor being lowered into place
in this picture--are very different from those involved in liquid motor fueling.
After compression, CNG is stored in aboveground vessels such as these cylinders.