Standard reducer dimensions Nominal Pipe Size (inches) Outside Diameter (mm) Outside Diameter (mm) Length (mm) Inch D P H 3/4 x 1/2 26.7 21.3 38 3/4 x 3/8 26.7 17.1 38 1 x 3/4 33.4 26.7 51 81 more rows …
Concentric and Eccentric Reducers MSS SP-75 ANSI B16.9 (in mm) * Wellgrow’s standard. Outside Diameter at Bevel Outside Diameter at Bevel Nominal Pipe Size (NPS) Large End Small End End-to-end Nominal Pipe Size (NPS) End-to-end 26 x 24 660.4 609.6 609.6 40 x 38 1016.0 965.0 609.6 26 x 22 558.8 40 x 36 914.0
When the upstream pipe is larger in size, the joint is called a pipe reducer. As the flow goes from a large pipe to a ‘reduced’ pipe size. Similarly, when the upstream pipe is smaller, flow goes from a small pipe to an ‘expanded’ pipe size.