Popular Dimensions
2" x 1"2" NPS x 1" NPS
4" x 2"4" NPS x 2" NPS
6" x 4"6" NPS x 4" NPS
8" x 6"8" NPS x 6" NPS
10" x 8"10" NPS x 8" NPS
Product page
SKYLAND
ASME B16.9 Buttweld Concentric Reducer
Skyland Concentric Buttweld Reducers connect two pipes of different nominal diameters along a common symmetrical centerline. Specially designed for vertical piping runs, pump discharges, and gas manifold lines, they facilitate gradual fluid velocity transitions with minimal energy loss and turbulence.
Standard compliance: ASME / ANSI B16.9, DIN 2616-2, EN 10253, and MSS SP-75
Size range: Large End 3/4" to 48" NB with Small End reductions down to 1/2" NB
Conical taper angle engineered to prevent flow separation and fluid turbulence
Wall thicknesses: Sch 5S, 10S, 40S, STD, 80S, XS, 120, 160, XXS with matching or unequal schedules
Ready for quotationShare your range, connection and case requirement.
Talk to ATHStandardASME / ANSI B16.9, DIN 2616-2, EN 10253, MSS SP-75
Large End Size3/4" to 48" (DN 20 to DN 1200)
Small End Size1/2" to 40" (DN 15 to DN 1000)
SchedulesSch 10S to Sch XXS
MaterialsASTM A234 WPB, A420 WPL6, A403 WP304/316L, Duplex
CertificationsISO 9001:2015, PED 2014/68/EU, EN 10204 3.1
Selection Guide
ASME B16.9 Concentric Reducer Data
Select large end and small end nominal diameters and schedules.
GeometryConcentric Centerline
Sizes3/4"x1/2" to 48"x40"
SchedulesSch 10 to XXS
StandardASME B16.9 / DIN 2616
Part Number Example
SKL-CR-040-020-SCH40-WPB
SKLBrandSkyland Metal & Alloys
CRTypeConcentric Buttweld Reducer
040Large End4" NPS (DN 100)
020Small End2" NPS (DN 50)
SCH40ScheduleSchedule 40
WPBMaterialASTM A234 WPB
Technical specifications
Length HStandardized per ASME B16.9 Table of Dimensions
BevelsASME B16.25 37.5° Bevels
Installation Notes
Concentric reducers should generally be avoided on horizontal pump suction lines to prevent vapor pocket cavitation.
Product Overview & Applications
Concentric reducers are primarily installed on vertical pipe runs and pump discharge nozzles where symmetrical flow distribution is essential to prevent mechanical stress on equipment flanges.