POUR POINT: D97
(Equivalent Test Methods: IP 15, ISO 3016, DIN 51597, JIS K 2269, and AFNOR T60-105)
EXPLANATION
Pour point of a petroleum oil is an index of the lowest temperature of its utility for certain applications. The cloud point (Test Method D2500) is usually higher than the pour point.
TEST SUMMARY
After preliminary heating, the sample is cooled at a specified rate and examined at intervals of 3 ° C for flow characteristics. The lowest temperature at which the movement of the oil is observed is recorded as the pour point.
TEST PRECISION
Repeatability: 3°C
Reproducibility: 6°C
NOTE
Three new pour point test methods are now available for Herzog, IT Phase Technology, and ATPEM automatic machines. The three methods show somewhat different precisions, but show no real bias against Test Method D97, which will be considered the referee method in case of a dispute.
