RPP or PPHOverall wrapped storage tank (tank)A new-generation polypropylene storage equipment made from PP granules, processed through heating, melting, extrusion shaping, and winding techniques. It features overall winding without weld seams and is gradually replacing various polypropylene storage equipment made from laminated boards.(Important Reminder: If PPH must be used, it is imperative that the manufacturer use imported materials; exercise extreme caution with domestic PPH.)