Propylene

Propylene is a multi-purpose industrial fuel gas offering economy, safety and performance.  Western International’s HPG brand of propylene is the leading alternate fuel gas used by the metal working industry for cutting, heating, brazing and metalizing applications.

Supply Options

Bulk Propylene

Polymer-grade propylene is supplied through a combination of direct pickup from the manufacturing location and storage depots located in strategic areas throughout the United States. The product is transported to depots from the manufacturing location via jumbo railcars that contain approximately 30,000 gallons of product. Propylene gas is stored at the depots in large bulk holding facilities with capacities exceeding 60,000 gallons, then loaded into transport carriers that deliver the product to the customer’s bulk storage facility.

HPG Propylene Cylinders

Propylene Shipping Data

Chemical Symbol C3H6 Synonyms CAS Registry Number DOT Proper Shipping Name Propylene DOT Classification 2.1 (Flammable gas) DOT Label FLAMMABLE GAS

TC Shipping Name Propylene TC Classification 2.1 TC Label FLAMMABLE GAS UN Number UN 1077

Propylene Physical Properties

	US Units	SI Units
Chemical formula	C3H6	C3H6
Density of the gas at 70°F (21.1°C)	0.110 lb/ft3	1.77 kg/m3
Molecular weight	42.081	42.081
Specific gravity of the gas at 70°F (21.1°C)	1.45	1.45
Density of the liquid at 70°F (21.1°C)	32.07 lb/ft3	513.71 kg/m3
Specific gravity of the liquid at 70°F (21.1°C)	0.514	0.514
Boiling range	-53.90°F	-47.72°C
Vapor pressure at 70°F (21.1°C)	132.81 psig	915.69 Kpa
Critical temperature	197.2°F	91.77°C
Critical pressure	670 psia	4619.5 Pa
Latent heat of vaporization at 77°F (25°C)	118.18 Btu/lb	437.71 kJ/kg
Cp of gas at 60°F (15.6°c) and 1 atm	0.355 Btu/lb/F	1.49 kJ/kg/C
Cv of gas at 60°F (15.6°c) and 1 atm	0.308 Btu/lb/F	1.288 kJ/kg/C
Gross heat of combustion	21048 Btu/lb	49112 kJ/kg
Flame temperature in oxygen	5295°F	2924°C
Flammable limit in air	2 to 11.1%	2 to 11.1%