Three-quarter angle view of a stainless steel butt-weld equal tee fitting isolated on white background, showing all three ports
Stainless Steel Butt-Weld Pipe Equal & Reducing Tee ASME B16.9 - Image 2
Stainless Steel Butt-Weld Pipe Equal & Reducing Tee ASME B16.9 - Image 3
Stainless Steel Butt-Weld Pipe Equal & Reducing Tee ASME B16.9 - Image 4
Stainless Steel Butt-Weld Pipe Equal & Reducing Tee ASME B16.9 - Image 5
Stainless Steel Butt-Weld Pipe Equal & Reducing Tee ASME B16.9 - Image 6
Stainless Steel Butt-Weld Pipe Equal & Reducing Tee ASME B16.9 - Image 7

Stainless Steel Butt-Weld Pipe Equal & Reducing Tee ASME B16.9

Category Tag

  • Versatile Branch Connection: Designed for creating perpendicular branches in piping systems – available in both equal (all ports same size) and reducing (branch outlet smaller than run) configurations.

  • Full Size & Pressure Range: Covers DN10 to DN2000 with wall thicknesses Sch10 to XS, pressure classes PN0.25–1.0MPa, and Class150–3000LB.

  • Multiple Material Options: Manufactured from 304/L, 316/L, and Duplex 2205/2507 stainless steel for corrosion resistance across diverse applications.

  • Global Standard Compliance: Produced to ASME B16.9, GB/T12459, DIN 2615, and other major international specifications.

  • Seamless Full-Strength Joints: Butt-weld design ensures smooth bore, minimal turbulence, and 100% joint strength matching the pipe itself.

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The Essential Branch Connection for Industrial Piping Systems

The Stainless Steel Butt-Weld Pipe Tee is a fundamental component for creating reliable 90-degree branch connections in critical industrial pipelines. Whether you need an equal tee for splitting flow into identical diameter lines or a reducing tee for stepping down to smaller branch lines, our comprehensive range covers every requirement from DN10 to DN2000.

As part of our Butt-Weld Fittings family, these tees are engineered for applications where strength, integrity, and longevity are non-negotiable – including oil & gas, petrochemical processing, power generation, and shipbuilding.

 

Equal vs. Reducing Tee: Choosing the Right Configuration

  • Equal Tee: All three outlets share the same nominal diameter. Ideal for manifold systems, main distribution points, or any application requiring balanced flow division.

  • Reducing Tee: The branch outlet is smaller than the main run. Essential for creating take-offs to auxiliary equipment, instruments, or smaller distribution lines without requiring separate reducers.

 

Engineering Excellence at Every Branch Point

  • Seamless or Welded Construction: Available in seamless (for sizes up to DN600) or welded (for larger diameters) configurations, both manufactured to strict dimensional tolerances.

  • Reinforced Branch Design: The branch junction is engineered to withstand internal pressure, thermal stress, and external loads – critical for long-term reliability in demanding environments.

  • Smooth Bore Transition: Precision manufacturing ensures a smooth internal surface at the branch intersection, minimizing turbulence and pressure drop.

 

Materials Engineered for Extreme Environments

Material Grade Key Properties Typical Applications
304/304L Excellent corrosion resistance, good formability General chemical, food processing, water treatment
316/316L Superior chloride resistance, higher strength Marine, pharmaceutical, coastal facilities
Duplex 2205 Twice the yield strength of 316L, excellent SCC resistance Offshore platforms, desalination, sour service
Duplex 2507 Super duplex, extreme corrosion and pitting resistance Highly aggressive chemical, high-chloride environments

 

Global Standard Compliance

All tees are manufactured and tested to meet or exceed:

  • ASME B16.9 – Factory-Made Wrought Butt-welding Fittings

  • GB/T 12459-2005 – Seamless Butt-welding Pipe Fittings

  • GB/T 13401-2005 – Plate-Formed Butt-welding Pipe Fittings

  • DIN 2615 – Steel Butt-welding Pipe Fittings – Tees

  • SH3408 / SH3409 / SH3410 – Petrochemical Industry Standards

  • HG/T21635, DL/T695, SY/T0510 – Industry-Specific Standards

 

Cross-section Diagram

Technical cutaway diagram of a butt-weld pipe tee illustrating the internal branch geometry and smooth flow transition
Precision Engineered Junction: Cross-section reveals the smooth internal bore and reinforced branch design for optimal flow and strength

Specification Table

Nominal Pipe Size (NPS) Outside Diameter At Bevel D (mm) Center to End C (mm)
Run Outlet Run(C) Outlet(M)
1/2 x 1/2 21.3 21.3 25.4 25.4
3/4 x 3/4 26.7 26.7 28.4 28.4
1 x 1 33.4 33.4 38.1 38.1
1-1/4 x 1-1/4 42.2 42.2 47.8 47.8
1-1/2 x 1-1/2 48.3 48.3 57.2 57.2
2 x 2 60.3 60.3 63.5 63.5
2-1/2 x 2-1/2 73 73 76.2 76.2
3 x 3 88.9 88.9 85.9 85.9
3-1/2 x 3-1/2 101.6 101.6 95.2 95.2
4 x 4 114.3 114.3 104.6 104.6
5 x 5 141.3 141.3 124 124
6 x 6 168.3 168.3 142.7 142.7
8 x 8 219.1 219.1 177.8 177.8
10 x 10 273.1 273.1 215.9 215.9
12 x 12 323.9 323.9 254 254
14 x 14 355.6 355.6 279.4 279.4
16 x 16 406.4 406.4 304.8 304.8
18 x 18 457.2 457.2 342.9 342.9
20 x 20 508 508 381 381
22 x 22 558.8 558.8 419.1 419.1
24 x 24 609.6 609.6 431.8 431.8
26 x 26 660.4 660.4 495.3 495.3
28 x 28 711.2 711.2 520.7 520.7
30 x 30 762 762 558.8 558.8
32 x 32 812.8 812.8 596.9 596.9
34 x 34 863.6 863.6 635 635
36 x 36 914.4 914.4 673.1 673.1
38 x 38 965.2 965.2 711.2 711.2
40 x 40 1016 1016 749.3 749.3
42 x 42 1066.8 1066.8 762 762
44 x 44 1117.6 1117.6 812.8 762
46 x 46 1168.4 1168.4 850.9 800.1
48 x 48 1219.2 1219.2 889 838.2
52 x 52 1320.8 1320.8 965.2 914.4
54 x 54 1371.6 1371.6 1003.3 952.5
56 x 56 1422.4 1422.4 1041.4 965.2
60 x 60 1524 1524 1117.6 1016
64 x 64 1626 1626 1194 1092
66 x 66 1676.4 1676.4 1219.2 1066.8
68 x 68 1727 1727 1270 1168
72 x 72 1829 1829 1320 1245
76 x 76 1930 1930 1422 1320
80 x 80 2032 2032 1499 1397

For complete dimensional data for all sizes (DN10–DN2000), download our Butt-Weld Tee Technical Documentation.

 

Applications

  • Oil & Gas: Pipeline branches, manifold systems, meter runs

  • Petrochemical: Reactor feed lines, distillation column connections

  • Power Generation: Boiler tubing, steam lines, cooling water systems

  • Shipbuilding: Engine room piping, ballast systems, fuel lines

  • Water Treatment: Distribution networks, chemical dosing lines

  • Mining: Slurry lines, process water systems

 

Quality Assurance & Testing

  • Dimensional Inspection: 100% inspection to ASME B16.9 / GB/T12459 tolerances

  • Non-Destructive Testing: RT/UT/PT/MT available upon request

  • Mechanical Testing: Tensile strength, hardness, flattening tests per batch

  • Chemical Analysis: Verification of material composition

 

Custom Options

  • Special Materials: Other grades available upon request

  • Non-Standard Dimensions: Custom sizes and wall thicknesses

  • End Preparation: Beveled ends standard; special preparations available

  • Marking: Laser marking per customer specification

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