Flash point measured by closed cup method is a precise and safety-critical analysis that shows the lowest temperature at which oil vapors can ignite in a closed system. This provides a realistic assessment of ignition risk under actual operating conditions, where vapors are retained and concentrated.
The sample is heated in a closed container under controlled conditions and at certain temperature intervals a small flame is supplied. The temperature at which a visible ignition occurs is recorded as the flash point.
The result gives the customer important insight into the flammability of the oil or liquid being analyzed. A low flash point may indicate fuel contamination or degradation of the oil, and is a clear warning of increased risks in storage, transportation or use. The analysis is used both as a safety check and as part of the quality assessment of oil and fuel products.