GB/T 37369-2019 in English
VALIDInspection and assessment of crossing and aerial crossing of buried steel pipelines
- Issued on:2019-03-25
- Implemented on:2019-10-01
- File Format:PDF
- Delivery:Via email within 5 business days
$359.00
《GB/T 37369-2019埋地钢质管道穿跨越段检验与评价》由TC262（全国锅炉压力容器标准化技术委员会）归口，TC262SC6（全国锅炉压力容器标准化技术委员会在役承压设备分会）执行，主管部门为国家标准化管理委员会。
Introduction
Analysis of the core content of the standard
This standard systematically specifies the inspection technical requirements and evaluation method system for buried steel pipelines crossing and spanning sections, and is applicable to long-distance pipelines, public pipelines and gathering pipelines. Its technical framework includes 9 core chapters and 2 informative appendices, forming a complete inspection closed-loop management process.
Comparison of inspection technology systems
| Inspection type | Main inspection items | Key technology | Evaluation criteria |
|---|---|---|---|
| Crossing section inspection | Macro inspection/pipe section inspection/special inspection | Electromagnetic inspection/Underwater detection unit/IMU | GB/T 19285/GB/T 30582 |
| Spanning section inspection | Supporting structure inspection/Atmospheric corrosion investigation | Wire rope electromagnetic inspection/Stress test | GB50205/GB/T 9075 |
| Special inspection | Diagnosis of structural material defects | Non-destructive inspection/load test | GB/T 19624 |
Key technology implementation points
1. Selection of detection technology for crossing and spanning sections
A graded detection strategy is adopted according to the buried depth of the pipeline:
- ≤10m: electromagnetic method + fixed formula
- 10-30m: electromagnetic method + fitting calculation
- >30m: Underwater pipeline detection device or IMU method
2. Verification of cathodic protection effectiveness
The detection ratio is required to be no less than 20%, with key attention paid to:
- Protection potential measurement (need to eliminate IR drop influence)
- Sacrificial anode output current test
- Electrical insulation device performance test
Standard implementation recommendations
Enterprise application guide
It is recommended to establish a three-dimensional inspection database, integrating:
| • Pipeline attribute data | Material/wall thickness/anti-corrosion type |
| • Environmental data | Soil type/hydrological characteristics |
| • Operation data | Detection records/failure files |
Inspection cycle optimization
Dynamic adjustment according to the change rate of the covering soil layer:
- Shorten the cycle when the annual change rate>5%
- Directional drilling crossing sections need to maintain soil cover of 10-15 times the pipe diameter
Technology evolution analysis
This standard systematically integrates for the first time:
- New detection technology: IMU inertial navigation, underwater robot detection
- Risk assessment system: Residual strength assessment based on GB/T 30582
- Digital management: Requires the establishment of a complete inspection data traceability chain
Loading PDF document...
Error loading PDF. Please make sure the file is valid and try again.
We also recommend
-
GB/T 37368-2019 in English
Guideline for inspection of buried steel pipelines
2019-03-25
