pipeline installation Construction services
Your Global Partner in Pipeline Installation
We are specialists in the installation and pre-commissioning of oil and gas pipeline systems. With certified expertise in GA1/GB1 Pressure Pipeline Installation and integrated Pigging, Testing, and Drying services, we deliver fully operational pipelines. Our core advantage to international clients is a single-source solution that guarantees safety, performance, and full compliance with global energy industry standards, protecting your investment from installation to first flow.
Pipeline Installation Construction
- Pipelines conveying toxic, flammable, or explosive gas with design pressure P > 1.6 MPa;
- Pipelines conveying toxic, flammable, or explosive liquid with conveying distance ≥ 200 km and nominal diameter DN ≥ 300 mm;
- Pipelines conveying slurry medium with conveying distance ≥ 50 km and nominal diameter DN ≥ 150 mm.
GB1 applies to gas pipelines.
GA1 Class & Long-Distance Pipelines
- Gas Transmission Pipelines with design pressure ≥4.0MPa (gauge pressure, same below)
- Oil Transmission Pipelines with design pressure ≥6.3MPa
Note: GA1 classification covers GA2 requirements. GB1 applies to gas distribution pipelines.
New Pipeline Services:
- Pigging (pipeline cleaning)
- Line sweeping
- Pressure testing
- Pipeline drying
Pipeline installation site
Pigging, Line Swabbing, and Pressure Testing for New Pipelines
Pigging and swabbing are critical steps in long-distance pipeline construction. The process involves using compressed air to propel cleaning pigs through the pipeline, effectively removing debris such as soil, welding slag, and other contaminants.
Pipeline Cleaning and Grouting Injection
Environmentally Safe Disposal of Decommissioned Pipelines (Cleaning & Grout Sealing)
Although decommissioned pipelines remain buried underground, years of corrosion and third-party construction activities may compromise their integrity. Without proper treatment, residual oil/gas in these pipelines can pose secondary hazards. While complete excavation removal is the optimal disposal method, most abandoned pipelines are located in high-risk areas—either beneath roads/buildings with complex permitting requirements or near environmentally sensitive zones like coastal shallows—making full removal impractical.
The environmentally safe disposal process consists of two phases:
- Pipeline Cleaning (method selection based on residual content):
- Physical cleaning: Pigging (PIG)
- Chemical cleaning: Solvent flushing
- Thermal cleaning: Steam purging
- Pipeline Sealing:
- Nitrogen purging
- Grout injection sealing (primary method)
Pipeline pigs are specialized devices propelled by gases, liquids, or the pipeline’s own medium to perform cleaning operations. They can also carry auxiliary tools to complete complex pipeline maintenance tasks.
During construction, pipelines inevitably accumulate debris (water, soil, sand, stones, welding slag, etc.). In operation, built-up condensates and corrosion products degrade gas quality, reduce throughput (while increasing pressure differentials and energy consumption), clog instrumentation, impair measurement accuracy, and accelerate internal corrosion.
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Beijing Jinshiwan is a leading integrated company of pipeline technology and services, combining high-end equipment manufacturing with professional engineering expertise. We deliver safe, reliable, and innovative full-lifecycle pipeline solutions for the global oil & gas, chemical, and utility industries.
Pipeline Construction & Installation
- Cross-country pipeline construction
- Pipeline installation and commissioning
- Plant pipeline systems installation
- Pipeline relocation and modification
Pipeline Maintenance & Repair
- Hot tapping and pressure tapping services
- Pipeline plugging and isolation services
- Emergency pipeline repair
- Pipeline rehabilitation and lining
- Composite sleeve repair (B-sleeve installation)
- Corrosion protection and repair
Specialized Technical Services
- Pipeline integrity management
- In-line inspection support services
- Non-disruptive live line modifications
- Pipeline pressure testing
- Pipeline cleaning and drying
Equipment & Manufacturing
- Hot tapping machine manufacturing
- Pipeline plugging equipment production
- Custom pipeline fittings fabrication
- Special valve manufacturing
Our International Service Advantages:
• 24/7 emergency response capability
• API and ASME compliant standards
• Multilingual project management
• Global shipping and logistics support
• On-site technical supervision worldwide
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