Project Overview
This high-pressure gas pipeline relocation project involves constructing 551m of new pipeline to replace an existing line. The new route runs:
- Eastward along the north side of a new retaining wall (green belt area) to Yuanmenpu Road
- Northward along the west sidewalk of Yuanmenpu Road, crossing XB05 Road
- Connecting to the existing GA1-class pressure pipeline (design pressure: 6.3 MPa)
Key Construction Details:
- New Pipeline Specifications:
- Material: L360M high-frequency straight seam welded steel pipe
- Dimensions: D355.6×6.3mm
- Coating: 3PE reinforced anti-corrosion
- Abandoned Pipeline Protocol: Nitrogen purging + grouting
- Pressure Isolation Works:
- 2 live gas line plugging points
- 4 cold cutting sections
- 4 buttering wall installations
Technical Parameters:
| Parameter | Value |
|---|---|
| Diameter | D355.6×6.3mm |
| Design Pressure | 6.3 MPa (GA1 Class) |
| Content | Natural gas |
| Coating | 3PE reinforced |
Project Timeline & Stakeholders:
- Client: Hunan Zhongyou Gas Co., Ltd.
- Duration: November 20 – December 20, 2023
- Location: Yuci Road, Liling City, Hunan Province
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