Does 8 months of sunlight exposure weaken blue MDPE pipe?

 

I assume not because builders often leave a few meters exposed above ground for yonks as a provision for a pending building project but thought I should ask. My self build neighbour donated 14m of 25mm MDPE pipe as he was tidying up his site and this section would be just right for the main feed into my house.

I’ve got a piece coiled up (which will one day connect to a grey water store) coming out of the ground that’s been there for probably 3 years. Nothing wrong with it from what I can see. But that’s just my view! 

Farmers round here leave blue pipe exposed at field troughs for years.