Inner Layer: Polyethylene (PE) solid wall pipe;

Outer Layer: Polypropylene (PP) coating.

Coating Requirements:

① Peelability:

Not easily separable during storage and before installation;

The coating should be manually removable using simple tools before butt fusion or electrofusion connection.

② Markings:

Complies with polyethylene (PE) pipe marking requirements;

The markings are distinctly different from those on non-coated pipes;

Includes warning markings to indicate the removal of the coating in the welding area before connection.