Punch-slotted Screen (PPS) (1) PPS is composed of base pipe, punched slot filtration jacket and stainless steel connecting rings. API tubing or casing is used as the base pipe and helically perforated. High quality stainless steel and special welding technique are used to eliminate the impacts of thermal stress and result in excellent corrosion resistant ability. Higher filtering ability Higher self-cleaning ability. Specifications O.D.(in)£º 4-1/2 Filtering precision£º 60~300µm Length£º3-12m (3) Application History of MDPT Screen They are extensively applied in Shengli Oilfield, Zhongyuan Oilfield, Daqing Oilfield, Liaohe Oilfield, Xinjiang and Kazakhstan.