Equal Tee - Butt-Weld Pipe Fitting
The equal butt-weld tee provides a true 90-degree branch from a run of pipe, with the branch and run sharing the same nominal size. It is the standard solution for splitting or merging process flows with minimal fabrication effort, keeping the whole branch within a single component.
Each tee is supplied with bevelled weld ends on the run and branch, ready for full-penetration butt welding. Fully traceable material certification is available with every order to support QA, inspection and UK project-compliance requirements.
Standards & Materials
Manufactured and pressure-tested in line with recognised UK and international pipe-fitting standards, in the most commonly specified carbon and stainless steel grades.
| Attribute | Specification |
|---|---|
| Manufacturing Standard | BS EN 10253-2 / ASME B16.9 |
| Carbon Steel | ASTM A234 Grade WPB |
| Stainless Steel | ASTM A403 Grade WP304 / 304L / 316 / 316L |
| Special Grades | Duplex & Super Duplex (UNS S31803 / S32205 / S32750), Alloy 20, Inconel 625 / 825, Monel 400, Hastelloy C-276 - available on request |
| Fabrication | Seamless or welded, as required |
| Configuration | Equal run and branch (same bore) |
| Test Pressure | Up to 1500 psi (per B16.9 rating) |
Dimensions & Sizes
Available in both metric (DN) and imperial (NPS) sizes from 1/2" (DN15) to 24" (DN600) in schedules 10, 40 and 80. The table below shows the standard ASME B16.9 centre-to-end and centre-to-branch dimensions for common sizes.
| Nominal Size | DN | Run (C) | Branch (M) | Wall (SCH 40) |
|---|---|---|---|---|
| 1/2" | DN15 | 25 mm | 25 mm | 2.77 mm |
| 3/4" | DN20 | 29 mm | 29 mm | 2.87 mm |
| 1" | DN25 | 38 mm | 38 mm | 3.38 mm |
| 1 1/2" | DN40 | 57 mm | 57 mm | 3.68 mm |
| 2" | DN50 | 64 mm | 64 mm | 3.91 mm |
| 3" | DN80 | 76 mm | 76 mm | 5.49 mm |
| 4" | DN100 | 102 mm | 102 mm | 6.02 mm |
| 6" | DN150 | 152 mm | 152 mm | 7.11 mm |
| 8" | DN200 | 178 mm | 178 mm | 8.18 mm |
Performance & Benefits
The equal-bore configuration ensures balanced flow and pressure distribution across all three outlets, reducing the risk of cavitation and unbalanced loading in manifolds and header systems. A single forged or machined tee also removes the need for multiple welds, cutting both fabrication time and potential leak paths.
Typical Applications
Widely used in water distribution, process manifolds, compressed air and hydraulic systems across the UK where an even branch of the same diameter is required.
Quality Assurance & Traceability
Every fitting is manufactured to BS EN 10253-2 and ASME B16.9 and supplied with full material traceability and EN 10204 Type 3.1 test certificates. Heat numbers are recorded throughout production to support inspection, QA and UK project-compliance requirements.
Supply & Delivery
Stocked at our Sheffield, UK facility and delivered nationwide across England, Scotland and Wales. We offer fast dispatch from stock with tracked UK delivery to site, and next-day options for common sizes.
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Which sizes and schedules are available?
Available from 1/2" (DN15) to 24" (DN600) in schedule 10, 40 and 80, in both metric and imperial sizes to suit UK installations.
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What is the difference between an equal and a reducing tee?
An equal tee has the same nominal bore on the run and branch. A reducing (unequal) tee has a smaller branch size, removing the need for a separate reducer.
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Can you provide material certificates?
Yes. Material test certificates and full traceability documentation are available with every order, to project and quality-management requirements.
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Do you deliver across the UK?
We deliver nationwide throughout England, Scotland and Wales, with fast dispatch from stock and tracked deliveries to site.