We manufacture straight- and spiral-welded perforated tubing
Most tubes and pipes have just two holes, one in each end, and manufacturers do everything they can to prevent any other holes from appearing in their products. Welded tube manufacturers put quite a bit of effort into preventing pinholes, cold welds, lap welds, and other flaws that could result in ventilation points along the weld seam.
And then there are tube and pipe producers like Beverlin Manufacturing Corp. Beverlin, located in Grand Rapids, Mich., manufactures lengths of tubing with additional holes. Many, many additional holes. Holes that are made intentionally. Consistently sized holes in regular patterns.
Perforated filter pipe with high permeability and filter function is used for air filter.
Perforated filter pipe with good high temperature resistance is used as exhaust pipe popularly.