Tianjin Brisk Steel is one of the manufacturers of LSAW Steel Pipe for Urban Gas Distribution in China. Our products are mainly exported to the Middle East, Southeast Asia, Europe, New Zealand, and other regions.If you would like to learn more about our products, feel free to contact us and send your purchase list.
Key Features
- Leak-Tight Weld Integrity: Double-sided submerged arc welding combined with 100% ultrasonic and X-ray inspection ensures a fully fused seam, minimizing the risk of gas leakage over long service life.
- Corrosion Resistance: Available with 3PE, FBE, or coal tar epoxy external coatings, plus internal epoxy lining options, to withstand soil corrosion in buried gas pipeline networks.
- Dimensional Accuracy: Tight tolerances on diameter, wall thickness, and roundness support tight-fit installation with valves, flanges, and fittings common in city gas systems.
- Pressure Adaptability: Manufactured to accommodate a range of operating pressures, from low-pressure distribution branches to medium-pressure trunk lines feeding district regulator stations.
- Cold Climate & Ground Movement Tolerance: Good low-temperature toughness and ductility help the pipe withstand freeze-thaw cycles and minor ground settlement common in urban underground environments.
Technical Specifications
| Item | Specification | ||
|---|---|---|---|
| Outer Diameter | 406mm – 1626mm (customizable) | ||
| Wall Thickness | 6mm – 40mm | ||
| Length | 6m – 12m (or per project requirement) | ||
| Applicable Standards | API 5L | ||
| Steel Grade | L245 – L485 / X42 – X70 | ||
| End Finish | Beveled end, plain end, or per customer drawing | ||
| Coating | 3PE, 3PP, FBE, coal tar epoxy (optional) |
Application Scenarios
This pipe type is widely used in:
- City gas trunk and branch pipelines
- Gas distribution stations and pressure-regulating networks
- Residential community gas supply retrofits
- Industrial park fuel gas piping systems
- Municipal pipeline replacement and upgrade projects
Why Choose This Pipe
Urban gas networks demand strict safety margins due to their proximity to populated areas. This LSAW pipe is produced under a quality system that includes raw material traceability, in-process weld monitoring, and full non-destructive testing before shipment - giving municipal contractors and gas utility operators a dependable material choice for long-term underground service.
FAQ
Q: What pressure rating can this LSAW pipe handle for urban gas systems?
A: The pipe can be manufactured to suit low, medium, and sub-high pressure gas distribution requirements, depending on wall thickness, steel grade, and design factor selected per project. Exact allowable operating pressure should be calculated according to the applicable code (e.g., API 5L, ASME B31.8) based on diameter and wall thickness.
Q: Is this pipe safe for direct burial underground?
A: Yes. With external anti-corrosion coating (3PE, 2PE, or FBE) and optional internal lining, the pipe is suitable for direct burial in most soil conditions. Cathodic protection is recommended as a supplementary measure for long-term underground gas pipelines.
Q: What's the difference between LSAW and ERW/SSAW pipe for gas distribution?
A: LSAW pipe uses a straight longitudinal weld formed by JCOE or UOE processes, generally offering better dimensional consistency and weld quality control for medium-to-large diameters. ERW is typically more economical for smaller diameters, while SSAW (spiral) is common for lower-pressure, larger-diameter applications. LSAW is often preferred where higher pressure ratings or stricter weld integrity standards apply.
Q: Can the pipe be customized to a specific diameter or wall thickness not listed?
A:Yes. Diameter, wall thickness, length, end bevel, and coating type can all be customized according to project drawings or client specifications, subject to production capability confirmation.
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