SH/T 0030-1990 Determination of Channel Point of Vehicle Gear Oils

AI-translated method card — human verification pending. This is not an official translation of the standard. Unclear source values remain unverified; check the original standard and product certificate before use.

Card type: Test method

1. Method number / full name / English name / replacement relationship

• Standard number: SH/T 0030-90
• Chinese full name: Determination of Channel Point of Vehicle Gear Oils
• English name: not provided in the available source
• Replacement relationship: not provided in the available source (only "equivalent adoption of US Federal Standard FTMS 791B 3456.1 'Channeling Characteristics of Lubricants'" is seen)
• Approval/implementation: approved by China Petrochemical Corporation 1991-03-27, implemented on 1992-04-01

2. Scope of application and non-applicability

• This standard specifies the determination of the channeling characteristics of lubricants using a channel point tester.
• This standard is applicable to the determination of the low-temperature fluidity of vehicle gear oils.
• Not applicable: not provided in the available source.

3. Method principle

A container filled with the sample is kept at the test temperature for 18h, then a steel strip is used to scrape a channel in the sample, and whether the sample flows back within 10s and completely covers the bottom of the container is observed to determine the channeling characteristics of the sample.

4. Reagents and materials (purity / preparation)

• Petroleum ether: 60～90℃, analytical reagent; or solvent naphtha meeting the requirements of GB 1922 NY 190.
• Solvent naphtha: meeting the requirements of GB 1922 NY 190 (see 4.7).
• Preparation method: not provided in the available source.

5. Instruments and equipment

• 4.1 Cold bath: non-liquid type, refrigeration range and controlled temperature −60℃±1℃～0℃±1℃ (the refrigeration range and temperature tolerance are garbled in the source transcription and require verification).
• 4.2 Hot bath: temperature control range 46～48℃.
• 4.3 Sample container: flat-bottomed cylindrical type. Inner diameter 92.1mm, height 114.3mm, foot height 25.4mm, a thermometer is installed in the central hole of the container cover, a steel strip for channeling is installed in the rectangular hole at the edge of the container cover, the schematic diagram of the test apparatus is shown in the figure below in the original text.
  • Labels in the figure: 1- container cover; 2- perforated stopper; 3- thermometer; 4- steel strip (channeling tool); 5- sample liquid level.
• 4.4 Steel strip for channeling: dimensions 152.4mm × 19.1mm × 3.2mm, made of stainless steel.
• 4.5 Thermometer:
  • a. Pour point thermometer No. 1: meeting the requirements of GB 514;
  • b. Pour point thermometer No. 2: meeting the requirements of GB 514.
• 4.6 Stopwatch: graduation 0.1～0.2s.
• 4.7 Solvent naphtha: meeting the requirements of GB 1922 NY 190.

6. Recommended operating conditions

• Hot bath temperature: 46～48℃.
• Sample heating temperature: 46℃.
• Cold bath test temperature: specified test temperature (specific value not provided in the available source).
• Cold bath storage time: 18h.
• Observation time after scraping the channel: 10s.
• Time limit for completing operations after removal: within 30s.
• Time limit for channel scraping operation: within 5s.

7. Sampling and sample preparation

• Pour approximately 650mL of the sample into the sample container until it reaches the 12.7mm mark from the top of the container.
• Other sampling and preparation requirements: not provided in the available source.

8. Analysis procedure

• 6.1 Pour approximately 650mL of the sample into the sample container until it reaches the 12.7mm mark from the top of the container. Then cover the container cover, insert the thermometer, and place the sample container in the hot bath, heat the sample to 46℃ (if a water bath is used, the water bath liquid level should be adjusted to be consistent with the sample liquid level).
• 6.2 When the sample temperature reaches 46℃, remove the sample container from the hot bath; if a water bath is used, wipe dry the water on the sample container.
• 6.3 While hot, adjust the thermometer on the sample container cover so that the bulb of the thermometer is located in the middle of the sample; at the same time, in the rectangular hole about 12.7mm from the wall of the sample container, insert the steel strip for channeling vertically to the bottom of the sample container. Then, immediately place the sample container into the cold bath.
• 6.4 After the sample container is placed in the cold bath, start the cold bath. When the cold bath temperature reaches the specified test temperature, start timing; the sample container is continuously stored at this cold bath temperature for 18h.
• 6.5 After storage for 18h, remove the sample container from the cold bath and complete the following operating procedure within 30s:
  • a. Check that the sample temperature should be within the range of test temperature ±1℃;
  • b. Open the sample container cover and remove the thermometer, and prevent the steel strip for channeling from moving;
  • c. Within 5s, scrape a channel in the sample by moving the vertically held steel strip for channeling along the diameter direction across and closely against the bottom of the container.
• 6.6 Within 10s after scraping the channel, carefully observe whether the sample flows back and completely covers the bottom of the sample container; if within 10s the sample flows back and completely covers the bottom of the sample container, the sample does not channel; otherwise, the sample channels.
• 6.7 Test record see Appendix A.

9. Qualitative and quantitative and calculation formulas

• Judgment rule: if within 10s after scraping the channel the sample flows back and completely covers the bottom of the sample container, the sample does not channel; otherwise, the sample channels.
• Calculation formula: not provided in the available source.

10. Precision

not provided in the available source.

11. Report

Report whether the sample channels or does not channel at the test temperature.

12. Referenced documents

• GB 514 Technical conditions for liquid thermometers for petroleum product testing
• GB 1922 Solvent naphtha
• Appendix A Channel point test record (reference item)
• Additional notes: This standard is technically administered by the Research Institute of Petroleum Processing; this standard is drafted by the Research Institute of Petroleum Processing; the main drafter of this standard is Ru Chenggui; this standard is equivalent to US Federal Standard FTMS 791B 3456.1 'Channeling Characteristics of Lubricants'.
• Editor's note: The standard numbers and standard names of the referenced standards in this standard have changed as follows:
  • Original standard number GB 514 → Current standard number GB/T 514 (the cited standard designation is garbled in the source transcription and requires verification)
  • Current standard name: Technical conditions for liquid thermometers for petroleum product testing

13. Source and verification

This page is an AI translation of the available Chinese method card. Human verification is pending. It is not an official translation of the standard. Check the source standard and product certificate before use.

14. Quick Q&A