Characteristics of elbows:

1. Based on actual reports, with good flexibility and heat resistance, its performance is better than other plastic pipes. Easy to install, good thermal conductivity, suitable for floor heating systems, recyclable

2. The P national standard stamped elbow pipe has excellent impact strength, can be hot melt welded and mechanically connected, and has better thermal conductivity than PB-PP-R

Comparison between stamped elbows and other performance:

1. Long term pressure resistance performance. In terms of design stress alone, the pressure resistance performance of national standard stamped elbows is better.

. However, due to various factors, the actual wall thickness of floor heating pipes is usually 2mm. At this wall thickness, all types of pipes can meet the requirements of floor heating, but the pressure resistance advantage of national standard stamped elbow pipes cannot be reflected

2. Thermal conductivity: The pipes used for floor heating need to have good thermal conductivity

3. Low temperature heat resistance and impact resistance: PE-RT and PEX have better low-temperature impact resistance. During winter construction, pipes are less susceptible to impact and rupture, increasing the flexibility of construction arrangements

4. Environmental friendliness: PE-RT can be recycled and reused without polluting the environment. The inability to recycle PEX will result in secondary pollution

5. Stability of processing performance: PEX has problems in controlling crosslinking degree and crosslinking uniformity, and the processing is complex and directly affects the performance of the pipe

Development trend of stamped elbow pipes: National standard stamped elbow raw materials not only have qualified creep rupture curves, but their pipe prices are moderate, and construction is relatively convenient and fast compared to other varieties. The connection form belongs to the current high-quality standard mutual fusion hot melt connection form, and the aperture of the pipe part is larger than the inner diameter of the same specification pipe. In the system, there is no mechanical connection method for local reduction.

, So the fluid resistance of the system is relatively small