How to test the pour point of oil?

How to test the pour point of oil？

The testing methods for the pour point of petroleum products mainly include the following standard methods, with specific operational procedures and scope of application as follows:

I. Primary Testing Standards and Methods

‌ASTM D5950-12 (Automatic Tilt Method)‌

Suitable for pour point determination of petroleum products, with a resolution of 1.0°C, reporting results at 1°C or 3°C intervals.

Features: High automation, with test results compatible with ASTM D97/IP15 formats.

‌ASTM D97‌

Determines the pour point by cooling the sample to the temperature at which it no longer flows, applicable to petroleum products such as diesel and lubricating oils.

‌ISO 3016‌

An international standard method, similar in principle to ASTM D97, applicable to various liquid petroleum products.

‌GB/T 3535—2025 (Chinese National Standard)‌

Equivalent to ISO 3016:2019, applicable to pour point determination of petroleum and synthetic sources.

‌IP 15‌

A standard from the British Petroleum Institute, similar in method to ASTM D97, emphasizing applicability to multiple petroleum products.

II. Typical Instrument Operation Procedure (Using an Automatic Pour Point Tester as an Example)

‌Sample Preparation‌

Inject the petroleum product into the test tube to the marked line, ensuring uniformity and absence of impurities.

‌Instrument Setup‌

After powering on, select the test mode (e.g., "Pour Point Test") and input sample information and the expected pour point.

‌Automatic Detection‌

The instrument initiates cooling and temperature control, observes changes in sample fluidity, and automatically records and prints the results.

III. Precautions

‌Sample Handling‌: Must be kept clean and dehydrated to avoid moisture affecting testing accuracy.
‌Environmental Conditions‌: Some standards (e.g., EN 23015) require operation under specific temperature and humidity conditions.

SD510-Q The pour point meter is designed and manufactured in accordance with the requirements of the People's Republic of China standard GB/T3535, and is suitable for measuring the pour point of sample products according to the methods specified in the above standards.

Pour point refers to the minimum temperature at which a cooled sample of oil can flow under specified test conditions; Expressed in degrees Celsius.

The instrument adopts a compressor for refrigeration, with fast cooling speed and long service life.

The display mode adopts small liquid crystal display, with good temperature control stability.

Two sets of tests can be conducted simultaneously, with a single slot and two holes, and the cooling speed is fast.

Provide a pour point test tube to measure the pour point value of the oil product.