The Pipe-based screen is a perfect combination of a high performance profile wire screen and a strong internal pipe. It utilizes a very accurate V-shaped wire welded onto supporting rods to form a jacket that is assembled onto the perforated pipe - making them ideally suited to deep wells. The very close slot control tolerances prevent sand migration. Most importantly, the V-shaped continuous slot opening ensures better flow performances and is specially designed for very severe conditions. As standard, 304 stainless steel is used in the manufacture of the jacket, and J55 or K55 for the pipe base. The standard external screen open area is 21%, although other percentage open areas are available.