Equal and Unequal Tee Fittings

Equal and Unequal Tee Fittings: ASME/ANSI B16.9, ANSI B16.28, MSS-SP-43

Equal and Unequal Tee ASME B16.9
Torrent Alloys
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BW Tee Specifications

ISO Certified manufacturer of Straight Pipe Tee, EN 10204 / 3.1B certified Buttweld Equal Tee and Reducing Tees - Seamless 1/2″～24″ Inch and ERW, Welded, Fabricated 1/2″～48″ Inch.

Buttweld Tees, including both Equal Tees and Unequal Tees, are integral components in a variety of piping systems, facilitating the branching of pipes with precision and reliability. These tees are available in a wide range of outside diameters to suit different needs: seamless pipe tees come in sizes from 1/2″ to 24″, while ERW, welded, or fabricated tees can range from 1/2″ to 48″. The versatility in size ensures that these fittings can be utilized in a multitude of applications, from small-scale domestic systems to large industrial setups.

The wall thickness of Buttweld Tees varies significantly, from 3mm to 40mm, covering numerous schedules including SCH5, SCH10, SCH20, SCH30, SCH40, STD, SCH60, SCH80, XS, SCH120, SCH140, SCH160, and XXS. This extensive range of thicknesses ensures that the tees can handle various pressures and temperatures, making them suitable for diverse environments and applications. Whether it’s a high-pressure system or a low-pressure one, there is a Buttweld Tee that fits the requirement.

In addition to their basic configurations, Buttweld Tees can be enhanced through a variety of value-added services. These include hot-dipped galvanizing, epoxy and FBE coating, electro polishing, sandblasting, threading, and soldering. These treatments not only improve the durability and corrosion resistance of the tees but also extend their lifespan, ensuring long-term performance and reliability in harsh environments.

We produce galvanized Buttweld Tees (Gi Tees), providing enhanced corrosion resistance and durability for harsh environments.

Buttweld Tees are manufactured from a wide array of production grades, including stainless steel, carbon steel, alloy steel, super duplex, duplex steel, high nickel alloys, and copper nickel. This variety ensures that the tees can be used in different industries, from chemical processing to oil and gas, and from marine applications to general construction. Each material grade offers unique properties that cater to specific industry requirements, ensuring optimal performance under different operating conditions.

Adhering to rigorous industry standards, these tees comply with ASME standards (ANSI B16.9, ANSI B16.28, MSS-SP-43), EN standards (EN10253-1, EN10253-2), and DIN standards (DIN2605, DIN2615, DIN2616, DIN2617, DIN28011). This compliance guarantees that the tees meet the highest quality and safety benchmarks, making them reliable components in any piping system. Furthermore, each Buttweld Tee is accompanied by comprehensive test certificates, including the Manufacturer Test Certificate as per EN 10204 / 3.1B, raw materials certificates, 100% radiography test reports, and third-party inspection reports, ensuring quality and reliability in every installation.

ASME B16.9 / B16.28 Standards
MSS SP-43 Standards
DIN Standards
EN Standards
JIS Standards
BS Standards

Industrial-Grade Buttweld Fittings: Tee | 45° Elbow | 90° Elbow | 180° Elbow | 1D Elbow | 1.5D Elbow | 3D Elbow | 5D Elbow | 10D Elbow | Hot Induction Bend | Piggable Bend | U Bend | Long Stub End | Short Stub End | Lap Joint Stub End | Caps

ASME B16.9 Straight / Equal Tee Dimensions

ASME B16.9 Straight / Equal Tee Dimensions
Nominal  Outside  Inside  Wall  Center  Center  Pipe  Weight 
Pipe Size Diameter Diameter Thickness T To End C To End M Schedule Pounds
1/2 0.84 0.622 0.109 1 1 40 0.35
3/4 1.05 0.824 0.113 1.12 1.12 40 0.5
1 1.32 1.049 0.133 1.5 1.5 40 0.75
1 1/4 1.66 1.38 0.14 1.88 1.88 40 1.3
1 1/2 1.9 1.61 0.145 2.25 2.25 40 1.9
2 2.38 2.067 0.154 2.5 2.5 40 3.2
2 1/2 2.88 2.469 0.203 3 3 40 5.8
3 3.5 3.068 0.216 3.38 3.38 40 7.2
3 1/2 4 3.548 0.226 3.75 3.75 40 9.5
4 4.5 4.026 0.237 4.12 4.12 40 12.7
5 5.56 5.047 0.258 4.88 4.88 40 20.8
6 6.62 6.065 0.28 5.62 5.62 40 33.1
8 8.62 7.981 0.322 7 7 40 56.5
10 10.75 10.02 0.365 8.5 8.5 40 90.9
12 12.75 12 0.375 10 10 * 136
14 14 13.25 0.375 11 11 30 162
16 16 15.25 0.375 12 12 30 206
18 18 17.25 0.375 13.5 13.5 * 272
20 20 19.25 0.375 15 15 20 350
24 24 23.25 0.375 17 17 20 508
30 30 29.24 0.38 22 22 * 835
36 36 35.24 0.38 26.5 26.5 * 1,294
42 42 41.24 0.38 30 28 * 1,495
48 48 47.24 0.38 35 33 * 2,300

ASME B16.9 Unequal / Reducing Tee Dimensions

ASME B16.9 Unequal / Reducing Tee Dimensions
Nominal
Pipe Size		 Dimensions of Run Dimensions of Branch Pipe 
Schedule		 Weight
Pounds
Outside
Diameter		 Wall
Thickness T		 Inside
Diameter		 Center 
to End C		 Outside 
Diameter		 Wall 
Thickness T		 Outside 
Diameter		 Center
to End M
3/4 x 1/2 1.05 0.113 0.824 1.12 0.84 0.109 0.622 1.12 40 0.41
1 1/2 x 1 1/4 1.9 0.145 1.61 2.25 1.66 0.14 1.38 2.25 40 2
1 1/2 x 1 1.9 0.145 1.61 2.25 1.32 0.133 1.05 2.25 40 1.9
1 1/2 x 3/4 1.9 0.145 1.61 2.25 1.05 0.113 0.824 2.25 40 1.8
1 1/2 x 1/2 1.9 0.145 1.61 2.25 0.84 0.109 0.622 2.25 40 1.8
1 1/4 x 1 1.66 0.14 1.38 1.88 1.32 0.133 1.05 1.88 40 1.3
1 1/4 x 3/4 1.66 0.14 1.38 1.88 1.05 0.113 0.824 1.88 40 1.3
1 1/4 x 1/2 1.66 0.14 1.38 1.88 0.84 0.109 0.622 1.88 40 1.3
1 x 3/4 1.32 0.133 1.05 1.5 1.05 0.113 0.824 1.5 40 0.81
1 x 1/2 1.32 0.133 1.05 1.5 0.84 0.109 0.622 1.5 40 0.78
2 1/2 x 2 2.88 0.203 2.47 3 2.38 0.154 2.01 2.75 40 5.4
2 1/2 x 1 1/2 2.88 0.203 2.47 3 1.9 0.145 1.61 2.62 40 5.1
2 1/2 x 1 1/4 2.88 0.203 2.45 3 1.66 0.14 1.38 2.5 40 4.8
2 1/2 x 1 2.88 0.203 2.45 3 1.32 0.133 1.05 2.25 40 4.6
2 x 1 1/2 2.38 0.154 2.07 2.5 1.9 0.145 1.61 2.38 40 3.1
2 x 1 1/4 2.38 0.154 2.07 2.5 1.66 0.14 1.38 2.25 40 3
2 x 1 2.38 0.154 2.07 2.5 1.32 0.133 1.05 2 40 2.8
2 x 3/4 2.38 0.154 2.07 2.5 1.05 0.113 0.824 1.75 40 2.5
3 1/2 x 3 4 0.226 3.55 3.75 3.5 0.216 3.07 3.62 40 9.8
3 1/2 x 2 1/2 4 0.226 3.55 3.75 2.88 0.203 2.47 3.5 40 9.4
3 1/2 x 2 4 0.226 3.55 3.75 2.38 0.154 2.07 3.25 40 9.2
3 1/2 x 1 1/2 4 0.226 3.55 3.75 1.9 0.145 1.61 3.12 40 8.9
3 x 2 1/2 3.5 0.216 3.07 3.38 2.88 0.203 2.47 3.25 40 7.2
3 x 2 3.5 0.216 3.07 3.38 2.38 0.154 2.07 3 40 7
3 x 1 1/2 3.5 0.216 3.07 3.38 1.9 0.145 1.61 2.88 40 6.8
3 x 1 1/4 3.5 0.216 3.07 3.38 1.66 0.14 1.38 2.75 40 6.6
3 x 1 3.5 0.216 3.07 3.38 1.315 0.133 1.05 2 5/8 40 6.5
4 x 3 1/2 4.5 0.237 4.03 4.12 4 0.226 3.55 4 40 11.9
4 x 3 4.5 0.237 4.03 4.12 3.5 0.216 3.07 3.88 40 11.6
4 x 2 1/2 4.5 0.237 4.03 4.12 2.875 0.203 2.47 3.75 40 11.4
4 x 2 4.5 0.237 4.03 4.12 2.38 0.154 2.07 3.5 40 11.2
4 x 1 1/2 4.5 0.237 4.03 4.12 1.9 0.145 1.61 3.38 40 11.2
5 x 4 5.56 0.258 5.05 4.88 4.5 0.237 4.03 4.62 40 20.5
5 x 3 1/2 5.56 0.258 5.05 4.88 4 0.226 3.55 4.5 40 20
5 x 3 5.56 0.258 5.05 4.88 3.5 0.216 3.07 4.38 40 19.4
5 x 2 1/2 5.56 0.258 5.05 4.88 2.88 0.203 2.47 4.25 40 19
5 x 2 5.56 0.258 5.01 4.88 2.38 0.154 2.07 4.12 40 18.8
6 x 5 6.62 0.28 6.07 5.62 5.62 0.258 5.05 5.38 40 32
6 x 4 6.62 0.28 6.07 5.62 4.5 0.237 4.026 5.12 40 30.5
6 x 3 1/2 6.62 0.28 6.07 5.62 4 0.226 3.55 5 40 30
6 x 3 6.62 0.28 6.07 5.62 3.5 0.216 3.07 4.88 40 30
6 x 2 1/2 6.62 0.28 6.07 5.62 2.88 0.203 2.47 4.75 40 29.7
6 x 2 6.62 0.28 6.07 5.62 2.38 0.154 2.07 4.75 40 29
8 x 6 8.62 0.322 7.981 7 6.62 0.28 6.065 6.62 40 56.5
8 x 5 8.62 0.322 7.981 7 5.56 0.258 5.047 6.38 40 54
8 x 4 8.62 0.322 7.981 7 4.5 0.237 4.026 6.12 40 53.2
8 x 3 1/2 8.62 0.322 7.981 7 4 0.226 3.548 6 40 53
8 x 3 8.62 0.322 7.981 7 3.5 0.216 3.068 6 40 52
10 x 8 10.75 0.365 10.02 8.5 8.62 0.322 7.981 8 40 86.5
10 x 6 10.75 0.365 10.02 8.5 6.62 0.28 6.065 7.62 40 85.9
10 x 5 10.75 0.365 10.02 8.5 5.56 0.258 5.047 7.5 40 82.5
10 x 4 10.75 0.365 10.02 8.5 4.5 0.237 4.026 7.25 40 82
10 x 3 10.75 0.365 10.02 8.5 3.5 0.216 3.068 7.25 40 79
12 x 10 12.75 0.375 12 10 10.75 0.365 10.02 9.5 * 123
12 x 8 12.75 0.375 12 10 8.62 0.322 7.981 9 * 120
12 x 6 12.75 0.375 12 10 6.62 0.28 6.065 8.62 * 118
12 x 5 12.75 0.375 12 10 5.56 0.258 5.047 8.5 * 117
12 x 4 12.75 0.375 12 10 4.5 0.237 4.026 8.5 * 112
14 x 12 14 0.375 13.25 11 12.75 0.375 12 10.62 30 151
14 x 10 14 0.375 13.25 11 10.75 0.365 10.02 10.12 30 148
14 x 8 14 0.375 13.25 11 8.62 0.322 7.981 9.75 30 146
14 x 6 14 0.375 13.25 11 6.62 0.28 6.065 9.38 30 145
16 x 14 16 0.375 15.25 12 14 0.375 13.25 12 30 221
16 x 12 16 0.375 15.25 12 12.75 0.375 12 11.62 30 213
16 x 10 16 0.375 15.25 12 10.75 0.365 10.02 11.12 30 197
16 x 8 16 0.375 15.25 12 8.62 0.322 7.981 10.75 30 190
16 x 6 16 0.375 15.25 12 6.62 0.28 6.065 10.38 30 180
18 x 16 18 0.375 17.25 13.5 16 0.375 15.25 13 * 262
18 x 14 18 0.375 17.25 13.5 14 0.375 13.25 13 * 248
18 x 12 18 0.375 17.25 13.5 12.75 0.375 12 12.62 * 241
18 x 10 18 0.375 17.25 13.5 10.75 0.365 10.02 12.12 * 229
18 x 8 18 0.375 17.25 13.5 8.62 0.322 7.981 11.75 * 216
20 x 18 20 0.375 19.25 15 18 0.375 17.25 14.5 20 352
20 x 16 20 0.375 19.25 15 16 0.375 15.25 14 20 339
20 x 14 20 0.375 19.25 15 14 0.375 13.25 14 20 327
20 x 12 20 0.375 19.25 15 12.75 0.375 12 13.62 20 315
20x 10 20 0.375 19.25 15 10.75 0.365 10.02 13.12 20 305
20 x 8 20 0.375 19.25 15 8.62 0.322 7.981 12.75 20 293
24 x 20 24 0.375 23.25 17 20 0.375 19.25 17 20 500
24 x 18 24 0.375 23.25 17 18 0.375 17.25 16.5 20 487
24 x 16 24 0.375 23.25 17 16 0.375 15.25 16 20 475
24 x 14 24 0.375 23.25 17 14 0.375 13.25 16 20 465
24 x 12 24 0.375 23.25 17 12.75 0.375 12 15.62 20 450
24 x 10 24 0.375 23.25 17 10.75 0.365 10.02 15.12 20 447
30 x 24 30 0.38 29.24 22 24 0.38 23.24 21 * 795
30 x 20 30 0.38 29.24 22 20 0.38 19.24 20 * 749
30 x 18 30 0.38 29.24 22 18 0.38 17.24 19.5 * 727
36 x 30 36 0.38 35.24 26.5 30 0.38 29.24 25 * 1,207
36 x 24 36 0.38 35.24 26.5 24 0.38 23.24 24 * 1,129
36 x 20 36 0.38 35.24 26.5 20 0.38 19.24 23 * 1,072
36 x18 36 0.38 35.24 26.5 18 0.38 17.24 22.5 * 1,136
42 x 40 42 0.38 41.24 30 40 0.38 39.24 28 * 1,468
42 x 36 42 0.38 41.24 30 36 0.38 35.24 28 * 1,415
42 x 30 42 0.38 41.24 30 30 0.38 29.24 28 * 1,327
42 x 24 42 0.38 41.24 30 24 0.38 23.24 26 * 1,248
48 x 42 48 0.38 47.24 35 42 0.38 41.24 32 * 2,207
48 x 38 48 0.38 47.24 35 38 0.38 37.24 32 * 2,154
48 x 36 48 0.38 47.24 35 36 0.38 35.24 31 * 2,127
48 x 30 48 0.38 47.24 35 30 0.38 29.24 30 * 2,048

An Equal Tee has all three outlets of the same size, ideal for even distribution of flow, while an Unequal Tee, also known as a Reducing Tee, has one branch outlet smaller than the main pipe, used to redirect flow to a smaller pipeline.

Torrent Alloys manufactures both types with precision to suit diverse industrial piping systems.

Torrent Alloys offers Equal and Unequal Tee fittings in a wide range of materials including:

  • Stainless Steel (304/304L, 316/316L)
  • Carbon Steel (ASTM A234 WPB, WPC)
  • Alloy Steel (WP1, WP5, WP9, WP11, WP22)
  • Duplex & Super Duplex (UNS S31803, S32750)
  • Nickel Alloys, Copper Nickel, Inconel, Monel, and more.

We ensure all fittings meet ASME B16.9 standards and industry-specific requirements.

Our Equal and Unequal Tee fittings are widely used in industries such as:

  • Oil & Gas
  • Petrochemicals
  • Power Plants
  • Shipbuilding
  • Pharmaceuticals
  • Water Treatment

These fittings are engineered for leak-proof connections and high-pressure applications, ensuring long-term performance in demanding environments.

Related Products

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90 Degree Elbow

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180 Degree Elbow

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1D Elbow

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1.5D Elbow

1.5D Elbow

3D Elbow

3D Elbow

5D Elbow

5D Elbow

10D Elbow

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Hot Induction Bend

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Piggable Bend

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U Bend

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Long Stub End

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Short Stub End

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Lap Joint Stub End

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End Caps

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Available Materials

Stainless Steel

Stainless Steel

Carbon Steel

Carbon Steel

Duplex & Super Duplex

Duplex & Super Duplex

High Nickel Alloys

High Nickel Alloys

Copper Nickel

Copper Nickel

Alloy Steel

Alloy Steel

APPLICATIONS INDUSTRIES

Buttweld tees, including both equal and unequal types, are essential for branching pipelines in various industries. These fittings ensure smooth and efficient fluid flow, with equal tees maintaining consistent diameter branches for uniform flow and pressure, while unequal tees connect different pipe sizes to accommodate varied flow rates. Commonly used in oil and gas, chemical, power, water treatment, and HVAC industries, buttweld tees enhance the adaptability and reliability of piping systems, making them crucial for efficient and versatile fluid management.

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Oil and Gas Industry
Chemical and Petrochemical Industry
Power Generation
Water Treatment
Food and Beverage Industry
Pharmaceutical Industry
Pulp and Paper Industry
Shipbuilding and Marine Industry
HVAC - Heating, Ventilation, and Air Conditioning