GB/T 35508-2017 in English
VALIDRegional cathodic protection within station
- Issued on:2017-12-29
- Implemented on:2018-07-01
- File Format:PDF
- Delivery:Via email within 5 business days
$301.00
《GB/T 35508-2017场站内区域性阴极保护》由TC381（全国腐蚀控制标准化技术委员会）归口，主管部门为中国石油和化学工业联合会。
Introduction
GB/T 35508—2017 Interpretation of the Standard for Regional Cathodic Protection in Stations
1. Background and Significance of Standard Formulation
The corrosion problem of buried steel pipelines, equipment and storage tanks in stations is becoming increasingly serious, especially for facilities in highly corrosive environments. Traditional anti-corrosion measures can no longer meet the needs. Regional cathodic protection technology, as an efficient and reliable anti-corrosion method, has been widely used at home and abroad. This standard aims to standardize the design, construction and acceptance of regional cathodic protection to ensure its effective implementation in stations.
2. Comparison of standard frameworks
| Standard dimensions | GB/T 35508—2017 | SY/T 0086 | Reference comparison |
|---|---|---|---|
| Scope of application | Regional cathodic protection of buried steel pipelines, equipment and outer walls of tank bottoms within the site | Electrical insulation requirements for cathodic protection pipelines | Complementary application |
| Core requirements | Forced current or sacrificial anode as the main protection method | Emphasis on electrical insulation design | Mutual complementation |
| Construction Specifications | Details the requirements for cathode energization points, cable laying and junction box installation | Focus on the selection and installation of insulation devices | Jointly ensure system reliability |
3. Recommendations for Standard Implementation
3.1 Design Phase
Protection method selection:Based on the site scale and geological conditions, forced current cathodic protection is preferred. For small sites or areas with limited space, sacrificial anodes can be considered as supplementary protection.
Auxiliary anode groundbed design:Deep well anode groundbeds are suitable for environments with low deep soil resistivity; shallow buried groundbeds are suitable for shallow corrosion problems. Flexible anodes and mesh anodes are more suitable for complex terrain and tank protection needs.
3.2 Construction phase
Cable laying:When laying cables directly in the ground, ensure that the cables are located below the frozen soil layer and leave enough margin to cope with soil settlement. When crossing roads or firebreaks, protective sleeves should be installed.
Wiring box installation:Use explosion-proof wiring boxes in explosion-proof areas to ensure that the grounding requirements and current capacity meet the design standards. Each protection circuit is equipped with a separate wiring box to avoid current interference.
3.3 Operation management
Regular inspection:Perform functional inspections on the sacrificial anode system, forced current system and power-on points according to the cycles specified in Table 1. In particular, the inspection frequency needs to be increased in areas with frequent lightning and active construction areas.
Maintenance measures:Repair damaged test piles and reference electrodes in a timely manner to ensure their normal operation. For under-protected or unprotected areas found, supplementary protection measures should be taken and cathodic protection parameters should be adjusted to optimize the protection effect.
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