Stainless Steel (Class 150) Pipe Flanges | McMaster-Carr
Thick-Wall Plastic Pipe Flanges for Water. Bolt two same-size flanges together with a gasket to create an access point within a line. They are also known as Pressure Class 150 flanges. They have thick, strong walls to handle heavy duty industrial plumbing and water supply applications, such as water processing, waste water treatment, and ...