Liquefied Petroleum Gas Product Compliance per GPA 2140
Enter lab results. Leave blank if not measured — blank rows are reported as "no data".
Composition fields apply to Propane HD-5. Moisture applies to propane grades; free water to butane / B-P.
Understand LPG product specifications, the GPA 2140 grades, test methods, and custody-transfer quality
GPA Standard 2140 (Liquefied Petroleum Gas Specifications and Test Methods) defines the property limits and the governing ASTM test methods for four commercial LPG/NGL product designations: Commercial Propane, Commercial Butane, Commercial B-P Mixtures, and Propane HD-5.
Commercial Propane (predominantly propane/propylene), Commercial Butane (predominantly butanes/butylenes), Commercial B-P Mixtures (butane-propane blends), and Propane HD-5 (a higher-purity propane fuel requiring at least 90 liquid volume percent propane and no more than 5 percent propylene).
HD-5 is a more tightly controlled propane intended for internal-combustion-engine fuel. It adds a composition requirement (minimum 90 liquid volume percent propane and maximum 5 percent propylene) and a lower total-sulfur limit of 123 ppmw, versus 185 ppmw for Commercial Propane. Both share a 208 psig vapor-pressure limit and a -37°F 95-percent-evaporation temperature.
The maximum vapor pressure at 100°F (ASTM D-1267) is 208 psig for Commercial Propane, B-P Mixtures, and Propane HD-5, and 70 psig for Commercial Butane.
Maximum total sulfur (ASTM D-2784) is 185 ppmw for Commercial Propane, 140 ppmw for Commercial Butane and B-P Mixtures, and 123 ppmw for Propane HD-5. Per GPA 2140 Note B, the total-sulfur limit excludes sulfur compounds added for stenching (odorization).
No. GPA 2140 Note B states that the total-sulfur limits do not include sulfur compounds used for stenching. The product sulfur entered for a spec check should be net of any odorant such as ethyl mercaptan.
GPA 2140 references vapor pressure by ASTM D-1267, volatile residue (95-percent-evaporation temperature) by ASTM D-1837, composition and butane/pentane-and-heavier by ASTM D-2163, residue on evaporation and oil stain by ASTM D-2158, copper-strip corrosion by ASTM D-1838, total sulfur by ASTM D-2784, and propane dryness/moisture by the GPA cobalt-bromide test or ASTM D-2713.