In places where polyethylene pipes pass through any building structures, they must be wrapped in a sheet asbestos, the thickness of which is 3 mm;
The distance between building structures and polyethylene pipes should not be less than 20 mm;
In places where polyethylene pipes pass through any building structures, they must be wrapped in a sheet asbestos, the thickness of which is 3 mm;
The distance between building structures and polyethylene pipes should not be less than 20 mm;