Telephone Log

Date:  November 17, 2010

Call between Margaret Sheppard, EPA and Mary Koban, DuPont
Fluoroproducts

Re:  Unique Fittings for HFO-1234yf

Mary Koban contacted Margaret Sheppard in response to a suggestion from
Dr. Chris Seeton to address any potential concerns from EPA about unique
service fittings for HFO-1234yf.  Ms. Sheppard explained that existing
EPA regulations under SNAP require unique service fittings.  Typically,
EPA will list unique fittings for the high side and low side service
ports, for large size professional containers for servicing (e.g., 30 lb
cylinders), and for small can taps, typically used for do-it-yourself
servicing.  Ms. Koban explained that SAE and DuPont have done
considerable work to ensure there are workable, unique fittings.  DuPont
is doing its own testing and plans to share that information and make it
available to anyone interested.  Mary Koban also explained that work for
the fittings for 30 lb cylinders and for other professional service
containers will be based on the dimensions for the fittings for the
low-side service port.  She suggested that EPA consult with the chair of
the SAE committee addressing the SAE J 639 standard.  Ms. Koban
suggested that ideally, a final SNAP rule would reference the unique
fittings in SAE J 639.

