| 摘要 |
A dual pipe for boiler is provided to heat the water easily and keep the heated water hot for a long time by interposing a metal heat exchange member between the inner and outer pipes. A dual pipe for boiler comprises an inner pipe(100) and an outer pipe(200) formed in an elliptical shape, an insulation material(120) filled in the inner pipe, and a mesh-type heat exchange member(300) arranged in a water channel formed between the inner and outer pipes. |
