GB/T 38651.2-2020 in English
VALIDPublic information signs carrier—Part 2：Inspection method
- Issued on:2020-03-31
- Implemented on:2020-10-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$156.00
| Standard No: | GB/T 38651.2-2020 |
| Document status: | VALID |
| Title in English: | Public information signs carrier—Part 2：Inspection method |
| Title in Chinese: | 公共信息标志载体 第2部分：检验方法 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2020-03-31 |
| Implemented on: | 2020-10-01 |
| ICS Classification: | 01.080.01-Graphical symbols in general |
| Chinese Classification: | A22-Terms and Symbols |
| Professional Classification: | GB-National Standard |
| Related Keywords: | public information signs carrier part
second part public information signs part method introduction standard framework |
| Related Topics: | carrier
carrier method public testing surface carrier t carrier Public inspection and testing system Inspection information analysis Colocalization detection method t100 public methods GB/T 38651.2 GB/T 38651.2-2020 National Standard Public Information Signs Part 2 Sohu |
《GB/T 38651.2-2020公共信息标志载体 第2部分：检验方法》由TC59（全国图形符号标准化技术委员会）归口，TC59SC1（全国图形符号标准化技术委员会城市导向分会）执行，主管部门为国家标准化管理委员会。
Introduction
Standard Framework and Technology Evolution
As the second part of the GB/T38651 series of standards, this document, together with Part 1 "Technical Requirements", Part 3 "Installation Requirements" and Part 4 "Maintenance Requirements", constitutes a complete technical system. The background of standard formulation stems from the uneven quality of public information signs in the process of urbanization, and the functionality and durability of the sign carrier are guaranteed through unified inspection methods.
Comparison of core inspection dimensions
| Mark type | Key inspection items | Testing tools | Judgment basis |
|---|---|---|---|
| Non-panel type | Adhesion, positioning accuracy | Vernier caliper, peeling test device | GB/T9286 |
| Panel type | Flatness, paint film performance | Ruler, gloss meter | GB/T13452.2 |
| Structural class | Anti-corrosion grade, connection strength | Salt spray test chamber, torque wrench | GB/T13912 |
| Luminous class | Light environment parameters | Spectrum tester, stroboscope | GA480.1 |
Detailed explanation of key inspection methods
1. Coating performance inspection
Salt spray resistance test requires no blistering or falling off after 168 hours of testing. Actual cases show that the service life of sign carriers coated with epoxy resin can be extended by 3-5 years in coastal areas.
2. Structural connection inspection
The pre-tightening force of steel structure bolts must be verified using a torque wrench in accordance with the requirements of GB/T1231. Inspection data from a certain subway project showed that the seismic performance of correctly tightened nodes is improved by 40%.
Implementation suggestions
1. Establish an inspection process checklist: It is recommended to develop an inspection process chart according to the basic provisions of Chapter 4 of the standard, including three stages: design review → process verification → finished product inspection
2. Equipment calibration requirements: Photoelectric equipment such as luminance meters and illuminance meters should be calibrated every quarter. A certain airport project had 20% of the signs failing to meet the brightness standards due to instrument inaccuracy
3. Sampling ratio setting: During mass production, it is recommended to develop a sampling plan according to GB/T2828.1, and the general AQL value is 1.0
Troubleshooting
Case: The paint film on a road sign in a certain city peeled off. After inspection, it was found that the 6×6 grid test specified in GB/T9286 was not carried out, and the actual adhesion was only level 2 (the standard requires ≥ level 4). The solution is to add a surface roughness pretreatment step.
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