GB/T 514-2005 Technical conditions for glass liquid thermometers for petroleum product testing

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: Product standard

1. Standard number / full title / replacement relationship / publication and implementation

• Standard number: GB/T 514—2005
• Chinese full title: Technical conditions for glass liquid thermometers for petroleum product testing
• English name: Specification for liquid-in-glass thermometers for testing of petroleum products
• Replacement relationship: replaces GB/T 514—1983 "Technical conditions for liquid thermometers for petroleum product testing"
• Previous versions: GB 514—1965, GB 514—1975, GB/T 514—1983
• Publication: issued by 2005-05-23
• Implementation: implemented by 2005-11-01
• Issuing bodies: General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of China
• Proposed by: China Petrochemical Corporation
• Administered by: Sinopec Research Institute of Petroleum Processing
• Drafting organization: Sinopec Research Institute of Petroleum Processing
• Participating drafting organization: Shanghai Huachen Medical Instrument Co., Ltd.
• Main drafters: Yang Tingting, Guo Tao, Li Qian
• Main changes from the 1983 version: modified the technical specifications of 10 thermometers; added technical specifications for 39 thermometers and corresponding illustrations and provisions for thermometer calibration points; technical specifications are mainly in list form, combining tables and figures; added clauses and appendices A, B, and C on referenced documents, terms and definitions, glass manufacturing requirements, capillary gap dimensions, and correction
• Nature of appendices: Appendix A, Appendix B, and Appendix C are all informative appendices

2. Scope of application and grade classification

• Scope (Chapter 1): This standard specifies the specification requirements for glass liquid thermometers used for temperature measurement in petroleum product test methods.
• Type (Chapter 4): Divided by structure into straight-stem thermometers and enclosed-scale thermometers (see Figure 1).
• Temperature-sensing liquid: mercury (quicksilver), ethanol, or mercury-based alloy.
• Thermometer numbering: the thermometers arranged by thermometer number are listed in Table 1; the thermometers classified by temperature range and scale division are listed in Table 2.
• Temperature scale (Chapter 5): based on the 1990 International Temperature Scale (ITS-90), graduated in degrees Celsius.
• Thermometer number range: GB-1 to GB-77 (Table 1 lists GB-1 to GB-77).

3. Technical requirements (index table, item by item: item | index | test method standard number)

3.1 General requirements (Chapter 7)

3.2 Technical specifications for each thermometer

• The technical specifications of enclosed-scale thermometers are detailed in Table 3 (Figure 2 to Figure 10).
• The technical specifications of straight-stem thermometers are detailed in Table 4 (Figure 11 to Figure 18).
• Table 3 and Table 4 list, thermometer by thermometer: thermometer number, name, corresponding figure number, temperature range, immersion depth, scale division, long engraved line interval, numbered marking interval, indication tolerance, shortest distance between graduations/maximum engraved line width, total length, outer diameter, temperature-sensing bulb dimensions, engraved line position, safety bulb, intermediate bulb, stem expansion portion, top finish shape, notes, etc. (for specific values see the original Table 3 and Table 4; this card does not transcribe them item by item).
• Table 5: ratio of engraved line length to scale width (listed separately by smallest division 0.1°C, 0.2°C, 0.5°C, 1.0°C, 2.0°C for odd-numbered degrees, even-numbered degrees, 5C, 10C, 20C).

3.3 Thermometer numbers and names (Table 1)

Note: Table 1 contains garbled temperature ranges, immersion depths, scale divisions and method references in the source transcription. Verify each affected specification against the original table before selecting or using a thermometer; the transcribed table is not a verified instrument specification.

3.4 Temperature range table (Table 2)

Table 2 lists temperature ranges, immersion depths, and thermometer numbers grouped by scale division values 0.02°C, 0.05°C, 0.1°C, 0.2°C, 0.5°C, 1°C, 2°C (for details see Table 2 in the original text).

4. List of referenced test methods

• GB 913 mercury
• JJG 50 Verification regulation for liquid-in-glass thermometers for petroleum products
• Applied method standard numbers listed in Table 1, Table 2, and Appendix A (GB/T 255, GB/T 261, GB/T 262, GB/T 265, GB/T 266, GB/T 267, GB/T 509, GB/T 510, GB/T 1884, GB/T 2430, GB/T 2539, GB/T 3145, GB/T 3498, GB/T 3535, GB/T 3536, GB/T 3554, GB/T 4507, GB/T 4510, GB/T 4929, GB/T 4985, GB/T 5304, GB/T 6536, GB/T 6602, GB/T 6986, GB/T 7325, GB/T 8017, GB/T 8018, GB/T 8019, GB/T 8026, GB/T 8927, GB/T 11145, GB/T 11964, GB/T 12579, GB/T 12580, GB/T 12581, GB/T 12709, GB/T 13287, GB/T 13377, SH/T 0030, SH/T 0035, SH/T 0059, SH/T 0060, SH/T 0066, SH/T 0068, SH/T 0089, SH/T 0090, SH/T 0099.1, SH/T 0100, SH/T 0115, SH/T 0124, SH/T 0132, SH/T 0179, SH/T 0191, SH/T 0192, SH/T 0221, SH/T 0248, SH/T 0325, SH/T 0326, SH/T 0430, SH/T 0557, SH/T 0560, SH/T 0561, SH/T 0565, SH/T 0585, SH/T 0603, SH/T 0638, SH/T 0639, SH/T 0644, SH/T 0661, SH/T 0685, SH/T 0702, SH/T 0722, etc.)

5. Inspection rules, sampling

• Correction (8.1): Full-immersion thermometers or partial-immersion thermometers shall be used under the specified conditions of use; if they are not used under the specified immersion depth conditions, or if the temperature of the emergent stem when a partial-immersion thermometer is used does not match the specified average temperature of the emergent stem, refer to the correction method in Appendix C.
• Verification (8.2):
  • 8.2.1 Thermometers shall be verified in accordance with the national metrological verification regulation JJG 50 and other relevant regulations and standard methods of the national metrological verification authority, and at each point listed in Table 6.
  • 8.2.2 The verification period shall be carried out in accordance with the period specified in the national metrological verification regulation JJG 50 (the maximum shall not exceed 1 years).
  • 8.2.3 Thermometers shall be used within the validity period of verification.
  • 8.2.4 All thermometers shall strictly comply with the requirements of this technical specification and be accompanied by a verification certificate.
• Verification points for thermometers in Table 6: list the verification points for GB-1～GB-77 thermometer by thermometer (for details see Table 6 in the original text).
• Sampling: not provided in the available source.

6. Marking, packaging, transportation, storage

• Marking (9.1):
  • On the scale surface of straight-form thermometers and on the front of the scale plate of enclosed-scale thermometers, the mark C (or °C) is engraved; on the back of the enamel strip of straight-form thermometers and on the back of the scale plate of enclosed-scale thermometers, the following marks are engraved:
  • 9.1.1 Thermometer number (for enclosed-scale thermometers, the number is engraved on the front of the scale plate);
  • 9.1.2 Manufacturer's trademark;
  • 9.1.3 CMC metrological mark;
  • 9.1.4 Year and month of manufacture;
  • 9.1.5 Name of the thermometer.
• Packaging and storage (9.2): Each thermometer shall be placed in a suitable box, and the box shall be marked with the thermometer number and temperature range. After packaging, the thermometers shall be stored indoors at -30°C to 40°C, with a relative humidity not exceeding 80%, free from corrosive gases, and well ventilated.
• Transportation: not provided in the available source.

7. Quick Reference Q&A