Dust Filtration on a Tanker using TAPIS Permanent Strainer Case Studies of Fine Dust Filtration. Huge tankers are normally used in the transportation of liquid product from one location to another. It is of paramount importance to keep dust from entering the tanker storage area during the conveying of the product. TAPIS TEKNIK Pte Ltd was called into action to re-design the filter element on the tanker, as the original filter element was deemed to be in-effective and poor in design functionality. TAPIS engineers managed to perform an accurate location of the critical dimensions that enables the newly designed strainer to be retrofitted. Filtration of contaminants was kept out as well, improving the product quality of the raw ingredients transported.