工作钢管：
无缝流体管、埋弧焊螺旋钢管、直缝焊管、镀锌管、不锈钢管、塑钢管、PPR管、PVC管等

保  温 层：
高密度聚氨酯硬脂泡沫 

外 护 管：
金属卷制管（镀锌铁皮、薄铝板、不锈钢板）

product advantages：

Mature technology and reliable use.
Utilizing the characteristics of polyurethane foam, there is no need to consider the corrosion protection of the inner surface of the outer protective steel pipe.
The outer protective tube shell is rolled by a special processing machine, and the joint is overlapped, with high dimensional accuracy and good rigidity, and the interface is impermeable.

Application field：

Chemical and petroleum pipelines, central heating and heating networks, central air-conditioning water supply and return pipelines, municipal engineering pipelines, building heating pipelines, etc.