Is there a difference between PPR steady state tube and PPR tube?

As the name implies, a steady-state tube is a stable state. Because the PPR pipeline is easy to change and the hardness is not enough, it can only be used for buried laying in the regulations of the Ministry of Construction. However, according to China's national conditions, some home improvement pipelines are not buried, so manufacturers add aluminum layers to the PPR to stabilize their state. In addition, the aluminum layer of the stable tube can also block oxygen and reduce light transmittance. Solve the problem that PPR pipes are easy to grow moss. PERT is mostly used for laying of floor heating pipes, while aluminum-plastic PERT is the same as aluminum-plastic PPR. PEX-B, the full name of silane cross-linked polyethylene, has now been replaced by PEX-C (electronically cross-linked polyethylene) abroad. It is a kind of low-temperature radiant heating. The pipeline is laid under the cement layer or the floor.