Stainless concentric and eccentric butt weld pipe reducers SS schedules include: S/5, S/10, S/40 and S/80. View an overview of our stainless steel product offerings. Select various butt weld reducer sizes, grades and schedules. Our pipe sizes and weights chart will help you research individual product specifications. Stainless steel butt weld reducers are manufactured to ASTM A403 with dimensional tolerances in accordance with MSS SP-43 for schedules 5s and 10s, and with ANSI B16.9 for schedules heavier than 10s. View the standard specifications chart. Butt weld reducers available from Shaw Stainless & Alloy. Here are the various grades of stainless steel. View this Reference Catalog to identify stainless steel buttweld reducers and other pipe fittings through drawings and other information. Here is a chart to review theoretical bursting pressures for various stainless steel pipe. A butt weld pipe reducer enables there to be a change in pipe size to meet certain hydraulic flow requirements or sometimes it's just a matter of connecting two different pipe sizes. An eccentric butt welding reducer is a pipe fitting that is used when a pipe on the upstream side of the fitting is larger than the downstream side of the fitting. A concentric butt welding reducer works the same way, but resembles a cone and keeps fluid or gas more centered, whereas eccentric reducers have a parallel edge, which results in an offsetting center. Eccentric butt weld reducers are used if the same top or bottom level of the pipe is required.