Popular Size Combinations
2" x 1"2" Run x 1" Branch (DN 50 x DN 25)
4" x 2"4" Run x 2" Branch (DN 100 x DN 50)
6" x 4"6" Run x 4" Branch (DN 150 x DN 100)
8" x 6"8" Run x 6" Branch (DN 200 x DN 150)
12" x 8"12" Run x 8" Branch (DN 300 x DN 200)
Product page
SKYLAND
ASME B16.9 Buttweld Reducing Tee (Unequal Tee)
Skyland Buttweld Reducing Tees (Unequal Tees) feature a 90-degree branch with a reduced nominal diameter relative to the main run pipe. Designed for severe service in oil & gas distribution, chemical processing, and power plant cooling lines, each tee is formed with an integrated reinforcement radius at the crotch to withstand intense hydraulic pressure, bending moments, and thermal cycles.
Complies with ASME / ANSI B16.9, DIN 2615-2, EN 10253-2, and MSS SP-75 standards
Main run sizes from 3/4" up to 48" with branch reductions down to 1/2"
Available in seamless forged construction (up to 24") and welded plate construction (up to 48")
Full wall schedule options: Sch 10S, 40S, STD, 80S, XS, 120, 160, XXS on both run and branch
Ready for quotationShare your range, connection and case requirement.
Talk to ATHStandardASME / ANSI B16.9, DIN 2615-2, EN 10253, MSS SP-75
Run Size Range3/4" to 48" (DN 20 to DN 1200)
Branch Size Range1/2" to 36" (DN 15 to DN 900)
SchedulesSch 5S to Sch XXS (matching or dual-thickness schedules)
MaterialsCarbon Steel A234 WPB, Stainless A403 316L, Duplex 2205, Inconel 625
CertificationsPED 2014/68/EU, ISO 9001:2015, EN 10204 3.1, NACE MR0175
Technical Selection
ASME B16.9 Reducing Tee Matrix
Select main run and reducing branch sizes for rapid pricing and technical verification.
StandardASME B16.9 / DIN 2615
Run Sizes3/4" to 48"
Branch Sizes1/2" to 36"
PressureASME B31.3 Rating
Part Number Example
SKL-RT-060-040-SCH40-316L
SKLBrandSkyland Metal & Alloys
RTTypeReducing Buttweld Tee
060Run Size6" NPS (DN 150)
040Branch Size4" NPS (DN 100)
SCH40ScheduleSchedule 40
316LMaterialASTM A403 WP316L
Technical specifications
Manufacturing CodeASME B16.9 / DIN 2615 / MSS SP-75
Weld PrepBeveled ends to ASME B16.25
Engineering Guidelines
Reinforced crotch ensures full strength compliance with ASME B31.1 and B31.3 piping codes.
Custom heavy-wall branch tees available for severe high-pressure compressor tie-ins.
Engineering Details
Reducing tees eliminate the need for a separate straight tee and reducer assembly, saving space, cutting weld joints by 50%, and reducing total installation labor and potential leak risks.
The extrusion process used by Skyland ensures smooth internal transition radii, preventing eddy currents and flow stagnation in process lines.