Flash Point Estimator

Estimate flash point based on product type or blend composition for safety classification

Input Parameters

Select method and enter product data

Blend flash point is dominated by the most volatile component. Using Le Chatelier's rule:

Estimate flash point from API gravity using empirical correlations (less accurate):

For safety margin calculation

Flash Point Analysis

Select method and enter data to calculate

Test Methods

  • ASTM D93: Pensky-Martens closed cup
  • ASTM D56: Tag closed cup
  • ASTM D92: Cleveland open cup
  • ASTM D3828: Small scale closed cup

Flash Point Classifications

NFPA/OSHA Flammable Liquid Classes

ClassFlash PointBoiling PointExamples
Class IA<73F (23C)<100F (38C)Pentane, Diethyl ether
Class IB<73F (23C)≥100F (38C)Gasoline, Acetone
Class IC73-100F-Xylene, Turpentine
Class II100-140F-Diesel, Kerosene
Class IIIA140-200F-Fuel Oil, Creosote
Class IIIB≥200F-Lubricating oils

Estimation Formula (API Correlation)

For distillate fuels: Flash Point (F) = 150 - 1.5 x API Gravity For crude oils (approximate): Flash Point (F) = 200 - 2.0 x API Gravity Note: These are rough approximations. Actual flash point depends on composition and should be measured directly.