Project at a Glance
| Category | Detalles |
|---|---|
| Client | China Petroleum Natural Gas Pipeline No. 2 Engineering Company |
| Contractor | Beijing Jinshiwan Pipeline Technology Co., Ltd. (JSW) |
| Project | Aviation Fuel Pipeline Relocation Project for the Beijing Municipal Administrative Center, Renmin University Campus and Surrounding Area |
| Core Challenge | Safely relocate a critical, high-pressure L360M aviation fuel pipeline without interrupting fuel supply to a major urban center. |
| Solution | A custom-engineered hot tapping and line stopping procedure combined with pipeline bypass installation to maintain continuous flow during the mainline isolation and relocation. |
| Key Results | 1. Zero Safety Incidents: 50,000+ man-hours with no recordable incidents. 2. Zero Service Disruption: Uninterrupted fuel supply to the new municipal center. 3. Rapid Execution: All tie-ins and relocation completed within the stringent 72-hour window. |
The Challenge: Relocating a Vital Artery in a Living City
When the Beijing Municipal Administrative Center planned its expansion around the Renmin University campus, a critical obstacle stood in the way: a high-pressure aviation fuel pipeline. This L360M steel gas pipeline was the primary fuel lifeline for the entire area. Any disruption would have meant grounding operations at key facilities and incurring massive logistical and economic losses.
The client, China Petroleum Natural Gas Pipeline No. 2 Engineering Company, faced a complex set of challenges. They needed an onshore pipeline hot tapping service for railway construction-like precision, but for a far more sensitive urban environment. The core problems were:
- Uninterrupted Service is Non-Negotiable: A complete shutdown for the relocation was not an option. The pipeline is a single-source supply; any halt would have a cascading, catastrophic effect on the new administrative hub.
- Safety Risks are Magnified: Working with a high-pressure aviation fuel line in a densely populated area with existing underground utilities presented extreme safety risks. A standard cut-and-replace operation was deemed too hazardous.
- Precision and Material Compatibility: The pipeline’s L360M steel grade required specialized welding procedures and material handling to maintain its structural integrity. Any error could compromise the pipeline for decades to come.
They needed more than just a pipeline contractor; they required a specialist who could execute a high-pressure natural gas pipeline isolation procedure with surgical precision, ensuring absolute safety and zero downtime.
The Solution: A Custom-Engineered Isolation and Bypass Strategy
Beijing Jinshiwan Pipeline Technology Co., Ltd. (JSW), a leading pipeline services company and equipment manufacturer, was selected as the pipeline contractor for this critical project. Our solution was not a simple shutdown, but a live, in-line intervention. We proposed a meticulously planned pipeline bypass installation and plugging method.
1. The Core Technology: Hot Tapping and Line Stopping
At the heart of our approach was a dual-phase hot tapping and line stopping procedure. This isn’t just a service; it’s a proven hot tapping and line stopping project case study in complex urban engineering.
- Hot Tapping: We first performed two hot taps on the existing, pressurized L360M pipeline. Using our proprietary, high-pressure tapping machines, we safely cut into the live pipe without any leakage or pressure loss, creating two connection points. The key benefit? We established a new flow path without ever shutting down the line.
- Line Stopping: With the taps complete, we inserted line-stopping plugs through the tapping fittings. These specialized plugs were activated to isolate the designated 1.8km section of the old pipeline. This created a safe, depressurized work zone, allowing our team to work on the “dead” section for relocation while fuel continued to flow through the new temporary path.
- Temporary Bypass Installation: The hot taps were connected via a temporary above-ground bypass system. This system acted as a detour, maintaining the full flow of aviation fuel to the downstream facilities while we worked on the mainline relocation.
2. Precision Execution: The JSW Difference
Our role as both a services provider and an equipment manufacturer gave us a unique advantage. We didn’t just use tools; we designed and built them. This allowed for:
- Material-Specific Welding: Our welding teams used pre-qualified procedures specifically for the L360M steel, ensuring perfect fusion and eliminating the risk of hydrogen-induced cracking.
- Integrated Safety Systems: We combined our proprietary line-stopping equipment with real-time pressure and gas monitoring systems, creating a fail-safe environment for the L360M steel gas pipeline maintenance construction phase.
- End-to-End Capability: Our scope wasn’t just isolation. We managed the entire process: nitrogen purging to remove residual vapors, precise oil draining from the isolated section, the final tie-in of the new pipeline, and the environmentally responsible removal and grouting of the 1.8km of old pipe.
The Process: From Planning to Perfection
Our project execution followed a rigorous, step-by-step process, showcasing our project management expertise:
- Engineering & Planning: We conducted a detailed finite element analysis (FEA) to model the stress on the L360M pipe during tapping. A full-scale simulation was run at our facility to test the bypass system before any work began on-site.
- Site Preparation & Safety Setup: We established a secure work zone with strict access control, fire suppression systems, and 24/7 gas monitoring.
- Hot Tap & Bypass Installation: Our technicians performed the two hot taps, installing the bypass line and verifying its integrity. Flow was successfully transferred to the bypass.
- Line Stop & Isolation: We deployed the line-stopping tools, isolating the old pipeline section. The line was then safely purged with nitrogen.
- Relocation & Tie-In: The old pipeline was cut, and the new section was welded into place. All welds were 100% non-destructively tested.
- System Restoration & Demobilization: The line stops were removed, flow was transitioned back to the new permanent pipeline, the bypass was demobilized, and the site was fully restored.
Results & Benefits: Quantifiable Success
The project was delivered with precision, safety, and efficiency, exceeding client expectations.
- Uninterrupted Fuel Supply: The bypass system ensured 100% service continuity. The new Beijing Municipal Administrative Center and surrounding areas experienced no interruption in their aviation fuel supply.
- Zero Safety Incidents: Over 8,000 man-hours were logged on this critical phase, with zero recordable safety incidents or environmental releases. This is a testament to our rigorous safety culture and expertise as a pipeline contractor.
- Schedule Adherence: All relocation and tie-in work was completed within the narrow 72-hour window, a critical factor given the project’s tight overall schedule.
- Long-Term Asset Integrity: By using precision methods and material-specific welding, we ensured the integrity of the new L360M pipeline, extending its service life and eliminating the risk of future leaks in a critical urban area.
“JSW’s ability to serve as both the equipment manufacturer and the executing contractor was the key to this project’s success. Their deep technical knowledge of the high-pressure natural gas pipeline isolation procedure gave us the confidence to proceed with this complex method. The zero-downtime result speaks for itself. They are a true partner, not just a vendor.”
— Project Manager, China Petroleum Natural Gas Pipeline No. 2 Engineering Company
About JSW: Your Partner in Pipeline Integrity
Beijing Jinshiwan Pipeline Technology Co., Ltd. (JSW) is more than a standard pipeline services company. We are a unique entity that combines the expertise of a premier pipeline contractor with the engineering prowess of a specialized equipment manufacturer. This dual capability allows us to provide unparalleled solutions for:
- Pipeline relocation and installation
- Emergency leak repair and maintenance
- Hot tapping and line stopping for live pipeline interventions
- Pipeline bypass installation and plugging
- Comprehensive maintenance and integrity management
When you choose JSW, you are not just hiring a contractor; you are partnering with a team that has engineered the very tools needed for your project’s success. We don’t just manage risks; we design them out of the process, ensuring safety, efficiency, and reliability from concept to completion.
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