With the continuous expansion of urban scale, urban underground pipe network systems are developing towards high load-bearing capacity, large flow rate, and long service life. As critical infrastructure for urban operation, pipe network systems such as water supply, drainage, gas, and heating have put forward higher requirements for the safety, stability, and durability of pipe materials. Among numerous steel pipe products, LSAW (Longitudinal Submerged Arc Welded) steel pipes, characterized by reliable structural performance and stable mechanical properties, are widely adopted in the construction of urban trunk pipelines.
Combined with the actual working conditions of urban pipeline systems, this article systematically interprets the specific application methods of LSAW steel pipes in different types of urban pipe networks.
I. Core Requirements of Urban Pipe Networks for Pipe Materials
1. High Safety and Long-Term Stable Operation
Urban pipelines are predominantly installed underground. Once leakage or structural failure occurs, it will not only result in high maintenance costs but also severely disrupted the normal operation of the city. Therefore, pipe materials must possess:
- Excellent pressure-bearing capacity
- Stable and reliable weld seam quality
- Predictable long-term service performance
LSAW steel pipes adopt the double-sided submerged arc welding process, featuring stable weld quality and uniform overall structure, which can meet the basic safety requirements of urban pipe networks.
2. Adaptability to Complex Underground Environments
The urban underground space environment is complex. Pipes often need to withstand soil pressure, groundwater pressure, and ground traffic loads, requiring high overall stiffness and deformation resistance of steel pipes. LSAW steel pipes can improve their adaptability under complex working conditions through increasing wall thickness and reasonable structural design.
II. Applications of LSAW Steel Pipes in Urban Water Supply Pipe Networks
1. Urban Main Water Transmission Pipelines
In urban water supply systems, LSAW steel pipes are mostly used in:
- Raw water transmission pipelines
- Urban main water supply pipelines
- Large-capacity flow distribution pipelines
Such pipelines usually have large diameters and stable operating pressures, requiring high weld strength and sealing performance of pipe materials. The continuous and dense welds of LSAW steel pipes help reduce leakage risks and ensure the long-term stable operation of the water supply system.
2. Coping with Water Hammer and Pressure Fluctuations
When starting or stopping pump stations or changing flow rates in urban water supply systems, pressure fluctuations are likely to occur. LSAW steel pipes have a certain safety margin in wall thickness design and weld strength, which helps resist short-term pressure impacts and reduce the operational risks of the pipe network.
III. Applications of LSAW Steel Pipes in Urban Gas Pipe Networks
1. Medium and High-Pressure Gas Transmission Pipelines
In urban gas systems, LSAW steel pipes are mainly applied in:
- Urban medium and high-pressure gas pipelines
- Urban main gas transmission pipelines
- Front-end pipelines of regional pressure regulating stations
Gas media have extremely high requirements for pipeline sealing and weld quality. The weld structure formed by double-sided submerged arc welding can effectively ensure that the weld strength is consistent with the base metal performance.
2. Improving the Safety Level of Urban Gas Systems
Compared with small-diameter pipelines, most urban main gas pipelines adopt a large-diameter and fewer-connection design. While reducing the number of weld joints, LSAW steel pipes improve the reliability of the overall pipeline, which is conducive to the safe operation and unified management of the urban gas system.
IV. Applications of LSAW Steel Pipes in Urban Drainage and Rainwater-Sewage Diversion Systems
1. Construction of Large-Diameter Drainage Pipelines
In urban drainage and flood control systems, LSAW steel pipes can be used in:
Urban main drainage pipelines
Main pipelines in rainwater and sewage diversion projects
Flood control and emergency drainage systems
With high structural strength, they are suitable for drainage projects with large burial depth and high external loads.
2. Combined Use with Anti-Corrosion Systems
The medium in drainage systems is complex, and the corrosion environment is relatively harsh. LSAW steel pipes can be used with internal and external anti-corrosion coatings to ensure structural strength while improving overall corrosion resistance and extending service life.
V. Applications of LSAW Steel Pipes in Urban Heating and Comprehensive Utility Corridors
1. Urban Centralized Heating Pipe Networks
In urban centralized heating systems, LSAW steel pipes are often used in:
Main heating transmission pipelines
High-temperature hot water or steam pipelines
Their adjustable wall thickness and high weld strength make them suitable for withstanding stress changes caused by thermal expansion and contraction.
2. Structural Advantages in Comprehensive Utility Corridor Projects
With the advancement of comprehensive utility corridor construction, the structural safety and standardization level of pipelines are particularly important. LSAW steel pipes have a wide range of specifications, facilitating unified planning and installation with utility corridor systems.
Conclusion
In modern urban pipe network construction, LSAW steel pipes have become an important choice for urban main pipelines such as water supply, gas, drainage, and heating due to their reliable structural performance, stable weld quality, and good engineering adaptability. Their advantages are particularly prominent in application scenarios requiring large diameters, high pressure-bearing capacity, and long service life.
As a professional manufacturer with more than 20 years of LSAW steel pipe manufacturing experience, Huayang Steel Pipe has long served various urban pipe networks and large-scale infrastructure projects, accumulating rich engineering application cases and manufacturing experience. We can provide stable and reliable LSAW steel pipe product support for different urban pipe network projects.
