Morrill Industries, Inc. stocks a wide variety of Pipe Flanges: AWWA, ANSI, and PVC Flanges. Custom Manufactured Flanges and Specialty Alloys available upon request. Our in stock inventory includes Slip-On, Weld Neck, Threaded, Lap Joint, Socket Weld, Blind, Reducing.

Difference between Tube & Pipe Flange size:

Tubing is generally used for structural purposes and the (outside diameter) OD is an important and exact number. Tubing size is specified by OD and the wall thickness (WT); and the measured OD and stated OD are generally within very close tolerances of each other. Tubing is usually more expensive than pipe due to tighter manufacturing tolerances. An example is 10″ 10GA tubing has an outside diameter (OD) of 10.00″

Pipes are categorized as tubular vessels used in pipeline and piping systems, and commonly transport gases or fluids. They are specified by “Nominal Pipe Size” (NPS) and Schedule (wall thickness). NPS is a size standard established by the American National Standards Institute (ANSI), and should NOT be confused with the various thread standards such as NPT and NPSC. The manufacturing of Nominal Pipe Sizes from 1/8″ to 12″ is based on a standardized nominal outside diameter (OD) that is different from the measured OD. NPS pipe 14″ and up have measured ODs that correspond to the nominal size. An example is 10″ Sch 40 pipe has an outside diameter (OD) of 10.75″