20G Carbon Steel Economizer Membrane Water Wall Panel φ38×4mm GB5310 Standard Boiler Pressure Part
The 20G Carbon Steel Economizer Membrane Water Wall Panel is manufactured to GB5310 standard using high-quality 20G seamless boiler tubes with φ38*4mm dimensions. This panel offers a cost-effective and reliable solution for economizer sections and low-temperature zones in Chinese-standard utility and industrial boilers.
Fabricated from 20G carbon steel seamless tubes in accordance with GB5310 (Seamless Steel Tubes and Pipes for High Pressure Boiler). 20G is the Chinese standard equivalent to SA210 Gr.A1, offering excellent weldability and proven performance in boiler economizer applications. Q235B membrane bars are joined to tubes via high-frequency resistance welding (HFRW) for a continuous gas-tight seal.
- GB Standard Compliance: Fully compliant with GB5310-2017 and GB/T 9222 (Strength Calculation of Water Tube Boiler Pressure Parts), ideal for projects requiring Chinese certification standards
- Cost-Effective Material: 20G carbon steel provides reliable performance at a competitive price point, reducing overall boiler construction costs
- Economizer Optimized: Tube diameter and pitch are optimized for economizer heat transfer duty, maximizing feedwater preheating efficiency
- Proven Track Record: 20G material has extensive operating history in thousands of Chinese-manufactured utility and industrial boilers worldwide
- Rapid Delivery: Shorter lead times compared to alloy steel panels due to readily available raw material inventory
Chemical composition and mechanical properties verified per GB5310 requirements. Tube flattening and flaring tests performed on each heat. 100% hydrostatic testing at 1.5x design pressure. Full material traceability with mill test certificates provided.
| Parameter | Specification |
|---|---|
| Tube OD | φ38mm |
| Tube Wall Thickness | 4mm |
| Tube Material | 20G (GB5310) |
| Membrane Bar Material | Q235B |
| Tube Pitch | 60-80mm |
| Welding Method | High-frequency resistance welding |
| Standard | GB5310, GB/T 9222 |
Economizer water wall and casing panels in coal-fired utility boilers, biomass boilers, and industrial steam generators. Ideal for replacement projects and new-build boilers requiring GB standard certification for Asian and Belt & Road Initiative markets.
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