ISO 2719:2016

Overview

ISO 2719:2016 - Determination of flash point: Pensky‑Martens closed cup method specifies three test procedures (A, B and C) for measuring the flash point of combustible liquids using a Pensky‑Martens closed cup tester. The standard covers homogeneous fuels, oils, paints and varnishes, biodiesel (FAME) and liquids with suspended solids or surface films in the temperature range 40 °C to 370 °C. Results are corrected to a standard barometric pressure and used for safety classification, handling and regulatory purposes.

Key technical topics and requirements

• Test principle: heat the test portion with continuous stirring and apply an ignition source at regular temperature intervals. The flash point is the lowest temperature at which vapour ignites and a flame propagates across the liquid surface; this value is then corrected to standard atmospheric pressure.
• Procedures:
  • Procedure A - for distillate fuels (diesel, biodiesel blends), new/in‑use lubricating oils, paints and other homogeneous liquids.
  • Procedure B - for residual fuels, used oils, mixtures with solids, liquids forming surface films or of high viscosity.
  • Procedure C - specifically for fatty acid methyl esters (FAME) (biodiesel) as referenced by EN 14214 / ASTM D6751.
• Apparatus & measurement:
  • Pensky‑Martens closed cup apparatus dimensions and assembly (see normative annexes).
  • Temperature measuring devices must meet accuracy and response requirements (Annex C).
  • Barometer with absolute pressure reading, accuracy ±0.5 kPa, resolution 0.1 kPa for pressure correction.
  • Automated testers manufactured after 1 Jan 2017: requirement to include a device to dispense an inert gas or vapour over the cup in the event of a cup fire.
• Sampling & sample handling: provisions for petroleum products, paints and viscous or semi‑solid samples; includes cleaning and apparatus verification procedures.
• Safety caution: some mixtures may not show a classic flash point but can exhibit flame enlargement or colour change and create fire hazard - take appropriate precautions.

Practical applications and users

Who uses ISO 2719:2016:

• Analytical and quality laboratories testing fuels, lubricants, biodiesel and related products.
• Fuel suppliers, refiners and biodiesel producers for product QC and specification compliance.
• Paint and varnish manufacturers (excluding water‑borne systems).
• Regulatory bodies, transport and storage operators for classification, labeling and safety data sheets (SDS). Practical uses:
• Classification of flammable/combustible liquids for shipping and storage.
• Detecting volatile contaminants or verifying blend compositions.
• Safety risk assessment and compliance with national/regional regulations.

Related standards

• ISO 13736 (kerosene testing practice)
• ISO 2592 (lubricating oils)
• EN 14214 / ASTM D6751 (FAME/biodiesel specifications)
• ISO 3679, ISO 1523 (testing water‑borne or volatile‑containing paints)
• ISO/TR 29662 (guidance on flash point testing and interpretation)

Keywords: ISO 2719:2016, Pensky‑Martens closed cup, flash point testing, biodiesel (FAME), combustible liquids, flash point standard, fuel quality, laboratory method.