1, the inner tube is corrosion-resistant, rustless and not easy to pollute.

2. The inner pipe wall is smooth, and it is not easy to block the pipeline by scale, and it is easy to clean the pipeline.

3. The insulation pipe with the same diameter, PERT insulation pipe is light in weight, convenient to construct, and it is not easy to crush the external insulation when stacking.

4. The tool of thermal insulation pipe joint is simple, and it doesn't need special equipment operators to weld, so it can be welded by electric heating.