20G High Pressure Boiler Seamless Steel Tube – Power Plant Grade
Product Overview
20G high-pressure boiler seamless steel tube is the standard material for thermal power plant boiler and steam systems. Specially designed for high-temperature and high-pressure service, it delivers stable mechanical properties, excellent oxidation resistance and reliable long-term performance under continuous steam pressure. This grade is the most widely used carbon steel boiler tube material, suitable for water walls, superheaters, reheaters and main steam pipelines in utility and industrial boilers.
Why Choose CNB Boiler Tube?
Our boiler tubes are sourced from specialized pressure vessel and boiler tube mills with full boiler manufacturing certifications. Every tube undergoes strict non-destructive testing and high-temperature performance verification to ensure reliable operation in critical boiler service. We supply both hot-rolled and cold-drawn tubes in a full range of sizes, with custom heat treatment and precision finishing options available.
Key Specifications
| Item | Specification |
|---|---|
| Product Name | High Pressure Boiler Seamless Steel Tube |
| Steel Grade | 20G / ASTM A106 Gr.C equivalent |
| Manufacturing Process | Hot rolled / cold drawn seamless |
| Outer Diameter Range | 10mm – 273mm |
| Wall Thickness Range | 2.0mm – 30mm |
| Standard Lengths | 6m – 12m, custom cut |
| Surface Condition | Black annealed, pickled option |
| End Condition | Plain end, beveled option |
| Applicable Standards | GB 5310, ASTM A106, EN 10216-2 |
| Maximum Service Temp | Up to 450°C continuous |
| Testing | Hydrostatic, UT, ET, tensile, hardness |
Core Advantages
- High pressure resistance: Designed for continuous high-pressure boiler and steam service.
- Thermal stability: Maintains consistent mechanical properties at elevated temperatures.
- Precise dimensions: Cold-drawn options provide tight tolerances for boiler tube assembly.
- Full NDT inspection: 100% non-destructive testing ensures defect-free quality for critical service.
- Proven power plant performance: Widely adopted in utility and industrial boiler projects worldwide.
Applications
This 20G boiler tube is widely used for power plant water walls, superheater tubes, reheater tubes, economizer tubes, steam headers, high-temperature pressure piping and industrial boiler systems.
Get a Quotation
We supply a full range of carbon and alloy boiler tubes in various sizes and grades for power plant and industrial boiler applications. Custom heat treatment and precision processing services are available upon request. Contact our power generation materials team for a detailed quotation.
