PU PUR Spray Foaming Production Line for Pre-Insulated Pipeline Manufacturing
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PU Spray Foaming Production Line for Pre-Insulated Pipeline Manufacturing Product Description Huashida's pre-insulated pipe production line is designed to manufacture directly buried thermal insulation pipes. The finished pipe consists of a steel working pipe, a rigid polyurethane (PU) foam insulation layer, and a polyethylene (PE) outer protective jacket. The line integrates continuous PU spraying and PE jacket winding processes, ensuring efficient production and consistent