Equal & Reducing Tee
Buttweld Tee : Specifications | Materials | Types | Dimensions | Weight Chart | Tolerances | FAQ
Top ASME B16.9 Buttweld Tee Manufacturer & Exporter – Equal & Reducing Tees in Stainless Steel, Carbon Steel, Alloy & High Nickel (Seamless & Welded, Sch 40 / Sch 80) – Supplied Worldwide
Best Export Prices: sales@midlandforgefittings.com
Midland Forge and Fittings Pvt. Ltd. is a trusted name in the global piping solutions industry, known for its commitment to quality, precision engineering, and customer satisfaction. With years of experience and a strong export footprint across regions like Europe, Australia, Africa, and Southeast Asia, Midland specializes in manufacturing ASME B16.9 Buttweld Tees, including both Equal Tee and Reducing Tee, to meet diverse industrial applications. Whether you need stainless steel, carbon steel, alloy steel, or high nickel tees, the company delivers precision-made components that ensure long-term performance in critical systems.
Buttweld Equal Tees are designed to provide reliable branch connections in piping systems where all three outlets are the same size. Engineered as per international standards, these tees offer seamless flow distribution with minimal turbulence.
Reducing Tees are ideal for flow redirection where pipe sizes differ, allowing efficient fluid or gas transition without compromising on system integrity. Both seamless and welded variants are available in Sch 40, Sch 80, and custom schedules, suitable for pressure-based applications across oil & gas, petrochemical, power, and marine industries.
Midland Forge and Fittings is equipped with advanced in-house facilities for forging, heat treatment, machining, and testing. Every Equal and Reducing Tee goes through stringent quality checks and dimensional verification to ensure compliance with ASME B16.9 and other relevant codes. Our quality assurance, combined with timely delivery and responsive customer service, has made us a preferred supplier to EPC contractors and industrial buyers worldwide.
Equal & Reducing Tee Specifications, Sizes & Standards
Buttweld Tee– Materials, Grades & Standards
| Material Category | Grade | Standards (ASTM / ASME) | Typical Use/Application |
|---|---|---|---|
| Stainless Steel | 304 / 304L / 304H | ASTM A403 WP304/304L/304H | General purpose, corrosion resistance |
| 316 / 316L / 316H | ASTM A403 WP316/316L/316H | Marine & chemical applications | |
| 317 / 317L | ASTM A403 WP317/317L | High corrosion resistance | |
| 321 / 321H | ASTM A403 WP321/321H | High temperature, stabilized | |
| 347 / 347H | ASTM A403 WP347/347H | High-temp pressure systems | |
| 904L | ASTM A403 WP904L / B625 | Acid handling, sulfuric environments | |
| 254 SMO | ASTM A403 / B366 | High chloride environments | |
| Carbon Steel | A234 WPB / WPC | ASTM A234 | Pressure piping & general piping systems |
| A420 WPL6 | ASTM A420 | Low temperature services | |
| Alloy Steel | A234 WP1 / WP5 / WP9 | ASTM A234 | High-temp & pressure pipelines |
| A234 WP11 / WP22 | ASTM A234 | Steam lines & refineries | |
| A234 WP91 | ASTM A234 | Power generation, high performance | |
| Duplex Steel | UNS S31803 / S32205 | ASTM A815 / A790 | Corrosion & high strength use |
| Super Duplex Steel | UNS S32750 / S32760 | ASTM A815 / A790 | Offshore, seawater applications |
| Nickel Alloys | Nickel 200 / 201 | ASTM B366 / B162 | Alkali & chemical processing |
| Inconel 600 / 625 / 718 | ASTM B366 | Heat exchangers, aerospace | |
| Incoloy 800 / 825 | ASTM B366 | Petrochemical & chemical processing | |
| Hastelloy C22 / C276 | ASTM B366 | Severe corrosion resistance | |
| Monel 400 / K500 | ASTM B366 | Seawater, chemical industries | |
| Alloy 20 | ASTM B366 | Sulfuric acid services | |
| Nimonic 75 / 80A | ASTM B366 / B637 | High-temp applications | |
| Copper Nickel | Cu-Ni 90/10 / 70/30 | ASTM B466 / B467 | Marine systems, seawater service |
| Titanium | Grade 2 / Grade 5 | ASTM B363 | Lightweight, corrosion resistance |
| Aluminium | 6061 / 5083 | ASTM B361 | Low-pressure, non-corrosive piping |
Types of ASME B16.9 Buttweld Tee
Dimensions of Equal Tee
| NPS (in) | Outside Diameter (mm) | Center to End (A) (mm) | Center to End (B) (mm) |
|---|---|---|---|
| 1/2″ | 21.3 | 25 | 25 |
| 3/4″ | 26.7 | 29 | 29 |
| 1″ | 33.4 | 38 | 38 |
| 1 1/4″ | 42.2 | 48 | 48 |
| 1 1/2″ | 48.3 | 57 | 57 |
| 2″ | 60.3 | 64 | 64 |
| 2 1/2″ | 73.0 | 76 | 76 |
| 3″ | 88.9 | 76 | 76 |
| 4″ | 114.3 | 102 | 102 |
| 5″ | 141.3 | 127 | 127 |
| 6″ | 168.3 | 152 | 152 |
| 8″ | 219.1 | 203 | 203 |
| 10″ | 273.0 | 254 | 254 |
| 12″ | 323.9 | 305 | 305 |
Dimensions of Reducing Tee
| Main Pipe Size (NPS) | Branch Size (NPS) | Center to End (A) | Center to End (B) |
|---|---|---|---|
| 1/2″ | 1/4″ | 25 mm | 25 mm |
| 1″ | 3/4″ | 38 mm | 38 mm |
| 2″ | 1″ | 51 mm | 51 mm |
| 3″ | 2″ | 64 mm | 64 mm |
| 4″ | 3″ | 76 mm | 76 mm |
| 6″ | 4″ | 102 mm | 102 mm |
| 8″ | 6″ | 127 mm | 127 mm |
| 10″ | 8″ | 152 mm | 152 mm |
| 12″ | 10″ | 203 mm | 203 mm |
Weight Chart: ASME B16.9 Buttweld Tee (SCH 40 / STD)
| Size (Inches) | Equal Tee (kg) | Reducing Tee (kg) |
|---|---|---|
| ½″ | 0.20 | 0.15 |
| ¾″ | 0.30 | 0.25 |
| 1″ | 0.45 | 0.35 |
| 1½″ | 1.10 | 0.90 |
| 2″ | 1.75 | 1.40 |
| 3″ | 4.30 | 3.50 |
| 4″ | 7.80 | 6.20 |
| 6″ | 15.00 | 12.00 |
| 8″ | 26.00 | 21.00 |
| 10″ | 40.00 | 33.00 |
| 12″ | 58.00 | 47.00 |
| 14″ | 78.00 | 63.00 |
| 16″ | 102.00 | 85.00 |
| 18″ | 130.00 | 110.00 |
| 20″ | 162.00 | 138.00 |
| 24″ | 230.00 | 200.00 |
| 26″ | 265.00 | 230.00 |
| 28″ | 300.00 | 260.00 |
| 30″ | 340.00 | 295.00 |
| 32″ | 380.00 | 330.00 |
| 36″ | 460.00 | 400.00 |
| 40″ | 550.00 | 480.00 |
| 42″ | 600.00 | 525.00 |
| 44″ | 645.00 | 570.00 |
| 48″ | 730.00 | 650.00 |
Tee Pipe Fitting Tolerances as per ASME B16.9
| Fitting Type | Parameter | Tolerance | |
|---|---|---|---|
| Up to 4” NPS | Above 4” NPS | ||
| Tee (Equal & Reducing) | Outside Diameter at Bevel | ±1.6 mm (1/16″) | ±1.6 mm (1/16″) |
| Center-to-End (A, B) | ±1.6 mm (1/16″) | ±3.2 mm (1/8″) | |
| Wall Thickness | -12.5% (no positive tolerance) | ||
| Ovality | Shall not exceed 1% of specified OD | ||
Can equal and reducing tees be used interchangeably?
Equal and reducing tees serve different purposes in piping systems and are not fully interchangeable:
Equal Tees: The branch and main pipe diameters are the same. They are ideal when uniform flow distribution and even pressure across all outlets are required. Common applications include main distribution lines and balanced process pipelines.
Reducing Tees: The branch pipe has a smaller diameter than the main run. These are used when the flow to the branch is intentionally reduced, such as for instrumentation lines, drain outlets, or secondary processing units.
Why they aren’t interchangeable: Substituting an equal tee for a reducing tee (or vice versa) without proper design checks can disrupt flow rates, cause pressure imbalances, and may violate ASME B16.9 or other relevant standards. Always follow system design specifications to ensure safety and efficiency.
What international projects use reducing tees from Midland Forge?
-
Natural Gas Processing Plants – Australia:
High-quality carbon steel reducing tees are used in gas processing pipelines, designed to handle high pressure and temperature conditions. -
Pharma-Grade Stainless Steel 316L Tees – Germany:
Precision-manufactured SS316L reducing tees meet stringent hygienic and pharmaceutical standards, suitable for cleanroom and high-purity processes. -
High-Pressure Carbon Steel Tees – South African Mining Projects:
Durable tees capable of withstanding abrasive and high-pressure slurry pipelines in mining operations.
How do equal and reducing tees impact pipeline flow dynamics?
Equal Tees:
- The branch and main pipe diameters are the same, which allows fluid to split evenly.
- Maintains uniform pressure and flow velocity across all outlets, minimizing turbulence.
- Ideal for main distribution lines or systems where balanced flow is critical, ensuring downstream equipment receives consistent flow rates.
Reducing Tees:
- The branch diameter is smaller than the main run, which creates a controlled reduction in flow rate and pressure at the branch.
- This design can regulate flow to secondary lines, instrumentation, or drain outlets without requiring additional control devices.
- Helps manage flow distribution in complex piping networks, particularly when feeding auxiliary equipment or parallel processes.
Flow Considerations:
- Equal tees are preferred when maintaining consistent velocity and pressure is important.
- Reducing tees are used strategically to balance system performance, avoid overloading secondary lines, and reduce the need for extra valves.