Flanged pipe and fittings are typical components in rigid piping systems. Such systems are particularly suited for above ground installation in the following: water filtration plants, sewage  disposal plants, wastewater treatment plants, pumping stations and industrial plants, per AWWA C115/21.15. The underground use of the flanged joint is not recommended due to the rigidity of the joint. Unequal settlement or other stresses may result in excessive strain on the flanges or the pipe due to excessive beam loadings.

U.S. Pipe Flanged Pipe is available in sizes 3″ through 64″. For flanged pipe sizes 3” through 54″ the minimum wall thickness is Special Thickness Class 53. Sizes 3” through 54” are also available in Special Thickness Class 54, 55 and 56. The minimum wall thickness for flanged pipe sizes 60″ and 64″ is Pressure Class 350.