This instruction establishes a provisional chemical resistance classification of low-density polyethylene with respect to 180 fluids. It is intended to give general indications on the possible use of low-density polyethylene pipes for the transport of fluids, at temperatures of up to 20 °C and/or 60 °C and in the absence of internal pressure and external mechanical stresses such as stresses. bending, forces due to the terrain, rolling loads, etc.