Equal and Reducing Tees: Selecting Branch Fittings for Industrial Pipelines

Author : KRELSON (Krelson) | Published On : 24 Oct 2026

Industrial piping networks require branch connections to distribute or combine fluid flow. Tee fittings provide a compact way to create these connections while maintaining a continuous pressure boundary.

The appropriate tee configuration depends on the sizes of the run and branch, flow arrangement, material and piping specification.

An equal tee has three connections of the same nominal diameter. A reducing tee has a smaller branch, allowing flow to be diverted to a different pipe size without installing a separate reducer.

For factory-made wrought buttweld tees, ASME B16.9 is a commonly used dimensional standard.

Carbon-steel tees may be specified in ASTM A234 WPB, while austenitic stainless-steel options include ASTM A403 WP304, WP304L, WP316 and WP316L. Duplex grades may require applicable ASTM A815 materials.

Buttweld tee wall thickness is selected to match the piping design, with options such as SCH 40, SCH 80 and SCH 160. Stainless-steel fittings may use SCH 10S, 40S or 80S.

Small-bore forged tees have different requirements. Socket-weld and threaded configurations commonly use ASME B16.11, with appropriate material and pressure-class specifications.

For industrial contractors sourcing a pipe tee supplier in the UAE , Krelson's tee range includes equal, reducing, socket-weld and threaded configurations, alongside material-specific products.

The enquiry should clearly identify the run size, branch size, connection type, material grade, standard and wall thickness or class.

Correct branch sizing and material compatibility help maintain fabrication accuracy and support the intended hydraulic and mechanical performance of the piping system.