WARNING - The use of this standard may involve hazardous materials, operations and equipment. This standard does not purport to address all of the safety problems associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
1 Scope
This standard specifies a method for the determination of the pour point of petroleum products. The test procedure for the determination of the lower pour point (see 6.10) of fuel oils, heavy lubricant base oil and products containing residual fuel components are also described .
Note: A method for the pour point of crude oils is under development. The pour point of crude oils may be determined by the general procedure described in this standard. But some crude oils may need a modified pretreatment to avoid the loss of volatile material.
The precision in this standard was derived on a sample matrix that did not include crude oils (See notes in Chapter 8).
2 Terms and Definitions
The following terms and definitions are applicable to this standard.
Pour point
Lowest temperature at which a sample of petroleum product will continue to flow when the product is cooled under specified conditions.
3 Method 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 movement of the sample could be observed is recorded as pour point.
4 Reagents and Materials
4.1 Sodium chloride (NaCl), crystals.
4.2 Calcium chloride (CaCl2), crystals.
4.3 Carbon dioxide (CO2), solid.
4.4 Coolant liquid: acetone, methanol or Petroleum naphtha.
4.5 Wiping fluid: acetone, methanol or ethanol.
Foreword I
1 Scope
2 Terms and Definitions
3 Method Summary
4 Reagents and Materials
5 Apparatus (See Figure 1)
6 Procedure
7 Expression of Results
8 Precision
9 Test Report
Appendix A (Normative) Thermometer Specifications
