The Energy Information Administration (EIA) reported new inventory data for purity propane labeled “Propane, fractionated and ready for sale” in the Petroleum Supply Monthly (PSM) released on December 29, 2023. Propane, fractionated and ready for sale stocks (e.g. HD-5 propane and HD-10 propane), includes stocks of fractionated propane, but excludes the propane component of unfractionated mixed products, (e.g. propane components of y-grade, refinery-grade propylene, and butane-propane mixes). As shown on the left-hand chart below, total U.S. propane stocks for October 2023 were 70% purity and 30% contained in Y-grade. Most of the Y-grade propane was located in PADD 2 (Midwest) and PADD 3 (Gulf Coast) where the vast majority of NGL fractionation capacity is located (right-hand chart below).
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- Analyst Insight
Y-Grade Carve-Out: One-Third of U.S. NGLs in Inventory Can’t Be Used Until Fractionated
In December 2023, EIA started reporting inventory for purity propane separately from propane entrained in unfractionated y-grade NGL mix.
- Analyst Insight
Propane Locked in Y-Grade Up To 40% and Moving Higher
On December 29, 2023, EIA released a new and long-awaited propane data series titled “Propane, fractionated and ready for sale” in the Petroleum Supply Monthly (PSM).
