GB/T 3555-2022 in English
VALIDTest method for Saybolt color of petroleum products—Saybolt chromometer
- Issued on:2022-07-11
- Implemented on:2022-11-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$214.00
《GB/T 3555-2022石油产品赛波特颜色的测定 赛波特比色计法》由TC280（全国石油产品和润滑剂标准化技术委员会）归口，TC280SC1（全国石油产品和润滑剂标准化技术委员会石油燃料和润滑剂分会）执行，主管部门为国家标准化管理委员会。
Introduction
Standard Revision and Core Upgrade
| Technical Features | Changes in the 2022 Edition | Contents of the 1992 Edition | Technical Impact |
|---|---|---|---|
| Specimen Processing Temperature | Add Melting Point Control Requirements | Only Specify Freezing Point +17℃ | Avoid Overheating and Oxidation of Wax Specimens |
| Optical System Calibration | Added Eyepiece Adapter Specifications | No Clear Optical Alignment Standards | Improve Color Contrast Accuracy |
| Color determination process | Refine the standard color plate selection rules | The steps are relatively simple | Reduce subjective operation errors |
Key instruments and operating specifications
The core equipment Saybolt colorimeter adopts a double-layer borosilicate glass tube structure and is equipped with a 0.5 mm inner diameter calibration light bar. Mandatory calibration standards for instruments include:
- The color temperature of the light source matches the CIE standard illuminant A (2750K±100K)
- The liquid column error of the 30inc/50.8cm scale does not exceed ±0.5%
- The light transmittance deviation is controlled at Δx≤0.003 in accordance with ASTM E308
Key points of sample processing technology
Control plan for keeping wax sample in liquid state
The heating control parameter setting must meet the following requirements: Tact=（melting point+8）~（melting point+17℃）, furnace temperature uniformity±1.5℃, and dissolution time≤60min to avoid color distortion caused by changes in the wax crystal structure.
Quality control and implementation suggestions
| Quality control indicators | Allowance deviation | Verification method | Corrective measures |
|---|---|---|---|
| Repeatability (r) | ≤1 color number | Three parallel samples by the same operator | Recalibrate the color temperature of the light source |
| Reproducibility (R) | ≤2 color numbers | Inter-laboratory comparison | Replace the matching glass tube set |
| Standard color plate ΔTw | ±0.005 | Verify with spectrophotometer | Mandatory replacement according to Appendix A |
Impact of standard evolution on the industry
Compared with the 1992 version, the main technological innovations brought about by the 2022 revision are:
- Electronic temperature control technology replaces traditional oil bath heating, and the liquefaction temperature fluctuation is reduced from ±5℃ to ±1℃
- Newly added critical control point detection process for film production, applicable to EE0132 grade white oil
- Toxicology test requirements expanded (aniline point detection added to 3 sets of parallel samples)
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