Aperçu du projet
This offshore gas pipeline isolation project involves pressure containment operations during the relocation of CNOOC’s gas pipeline for the new Fuzhou-Xiamen railway construction. Key tasks include:
Critical Workscope:
- Installation of DN400 full-wrap isolation fittings (4 locations)
- DN400×350 bypass fittings (4 locations)
- DN50 pressure balance lines (4 locations)
- DN400×20 airbag containment fittings (4 locations)
- 150m DN350 bypass pipeline (2 routes)
- Hot tapping operations:
- 4× DN400 isolation taps
- 4× DN350 bypass taps
- 4× DN50 balance taps
- 4× DN200 airbag taps
- Non-sparking pipe cutting (4 locations)
- Plugging operations (8 locations)
Pipeline Specifications:
| Paramètres | Valeur |
|---|---|
| Diamètre | φ406×8mm |
| Matériau | L360M steel |
| Pression de conception | 4,0 MPa |
| Pression de fonctionnement | 2.0 MPa |
| Contenu | Gaz naturel |
| Revêtement | 3PE anti-corrosion |
Calendrier du projet et parties prenantes :
- Client : China Railway 16th Bureau Group Co., Ltd.
- Durée de l'enquête : June 15 – July 20, 2021
- Localisation : Fuzhou City, Fujian Province
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