Buttweld Reducers

SDR11 - SDR17

In a concentric reducer the reduction is symmetrically central, and tapers evenly to the next size. buttweld concentric reducers are used to join pipe and fittings of different diameters to smaller pipes and fittings on the same common line axis, acting as a hydraulic flow limiter. They provide an in-line conical transition between pressurised or non-pressurised pipe of different diameters. Our short spigot reducers have been designed with performance in mind, as well as enough spigot length to be clamped in the buttwelding machines flat clamps. They are also short enough to be able to be used in a fast end fitting chuck as well. Concentric reducers are the most utilised reduction in piping by ten to one. In isometrics and process piping designs this reducer fitting is also referred to as an enlarger or expander, which means the flow direction will be reversed and will come from the reduced side. This is commonly seen in pump discharges and process piping, as it reduces back pressure, will increase the flow, and decrease the friction loss, especially over longer pipe runs. Concentric reducers are generally considered best for purpose on vertical piping, unless obstacles or bracketry requirements need to be considered and an eccentric reducer may be better suited. See the eccentric reducers section, also available in long and short spigot. Advanced Piping can machine any reduction to your exact requirements and pressure rating when outside of our large concentric reducer range, which is available standardly in SDR7.4 PN25 from 25mm to 500mm; SDR11 PN16 20mm to 710mm; and SDR17 PN10 63 to 1200mm.