بایگانی برچسب: RISER WALL CONSTRUCTION

مشخصات جداره رایزر | RISER WALL CONSTRUCTION

مشخصات جداره رایزر | RISER WALL CONSTRUCTION KianSanat Pasargad manufactures manhole risers using a spiral winding process. In spiral winding, a flatpolyethylene extrudate is wound over a rotating mandrel. A small corrugated tube is woundover first layer of extrudate to enhance stiffness of pipes. Smooth outer surface is achieved bywinding a flat extrudate over stiffener […]