LPG: Types and Applications

LPG is typically categorized into Cold LPG and Hot LPG based on the climate conditions in which it is used and the ratio of propane (C₃H₈) to butane (C₄H₁₀).
The vapor pressure of LPG depends directly on this propane–butane ratio, and therefore, each region adjusts the blend to ensure proper vaporization and performance.

Cold LPG (Winter LPG)

Cold LPG is specially formulated for cold climates to ensure the gas vaporizes easily at low temperatures.

Typical Composition

Cold LPG contains a higher percentage of propane, because propane vaporizes even at –42°C.

Common propane/butane ratios:

  • 70% Propane / 30% Butane (70/30)
  • 60% Propane / 40% Butane (60/40)
  • 80/20 (in extreme cold regions)

Characteristics

  • Higher vapor pressure
  • Reliable ignition in low temperatures
  • Recommended for winter seasons and cold-weather countries

Applications

  • Residential heating and cooking in cold areas
  • Industrial burners operating outdoors
  • Automotive LPG (Autogas) in winter
  • Forklifts and machinery used in cold environments

Hot LPG (Summer LPG)

Hot LPG is used in warm or tropical climates, where vapor pressure naturally stays high. Therefore, a higher percentage of butane is preferred because it has higher energy content and is more economical.

Typical Composition

Common propane/butane ratios:

  • 30% Propane / 70% Butane (30/70)
  • 40% Propane / 60% Butane (40/60)
  • 20/80 (in very hot climates)

Characteristics

  • Lower vapor pressure (safe and stable in high temperatures)
  • Higher energy content per liter compared to propane-rich blends
  • More cost-efficient for regions with warm weather

Applications

  • Domestic cooking and heating in warm countries
  • Commercial kitchens
  • Small industrial burners
  • Summer LPG cylinders