Why measure the cold filter point of oil products?

Why measure the cold filter point of oil products?

The significance of determining the cold filter plugging point (CFPP) of petroleum products is mainly reflected in the following aspects:

‌1. Reflect Low-Temperature Fluidity‌

CFPP is a key indicator of a petroleum product's flow performance in low-temperature environments, representing the highest temperature at which wax crystal precipitation causes filter clogging. This parameter better reflects the actual low-temperature performance of petroleum products compared to the pour point.

‌2. Guide Practical Applications‌

CFPP is typically 4–6°C higher than the pour point, making it closer to the actual lower temperature limit for petroleum product use. For example, No. 0 diesel has a CFPP of 4°C and a pour point of 0°C, meaning that while the diesel does not solidify in the 0–4°C range, it may fail to filter normally.

‌3. Ensure Equipment Operation‌

Excessively high CFPP can increase oil viscosity at low temperatures, potentially causing engine starting difficulties or unstable operation. Controlling CFPP ensures fuel system reliability in cold environments.

‌4. Optimize Product Formulation‌

CFPP is closely related to oil composition. Determination allows adjustment of additive ratios or optimization of production processes to improve low-temperature performance. For example, No. -20 diesel requires a CFPP ≤ -14°C to meet usage demands in cold regions.

‌5. Provide Standardized Testing Basis‌

CFPP determination follows standard methods such as SH/T 0248 and ASTM D6371, offering authoritative data for quality control and trade.

CFPP, along with the cloud point, pour point, and freezing point, forms the low-temperature performance evaluation system for petroleum products. Due to its alignment with real-world conditions, CFPP is a critical indicator.

The ‌SH113A-L Petroleum Cold Filter Plugging Point Tester (Alcohol Bath)‌ is designed and manufactured in accordance with the People's Republic of China standard ‌SH/T 0248‌, and is suitable for determining the cold filter plugging point (CFPP) of petroleum products using the method specified in the aforementioned standard.