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Structure Fittings – Double Tee

Structure Fittings – Double Tee

Goel Scientific’s structure fittings double tee is a four-way modular joint that connects structural tubes at central intersections in support frameworks for borosilicate glass process equipment. It is available in cast iron and stainless steel variants and suits standard structural tube diameters used in pharmaceutical, chemical and laboratory installations. The double tee combines two tee-shaped joints to create a rigid connection for multi-directional frameworks. Its modular design eliminates the need for welding, hot work or drilling during assembly. Internal bores fit over tube diameters, while grub screws securely lock each socket in position.

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Key Features

  • Dual-Branch Symmetrical Connection: Allows branching in two opposite directions from a central tube, forming a balanced four-way connection node.
  • Multiple Branching Capability: Distributes structural loads across four axes without joint proliferation or complex cascading fittings.
  • Tool-Only Installation: Grub screws lock matching galvanised tubes securely into sockets without welding, thread cutting, or hot work.
  • Cast & Stainless Steel Construction: Manufactured from heavy-duty cast iron for standard duty, with optional stainless steel (SS 304 / SS 316) construction for aggressive chemical environments.
  • Precise 90-Degree Geometry: Consistent angular tolerances across all sockets ensure the completed framework sits square without cumulative alignment errors.

Specifications

The structural double tee is available in four standard nominal bore (NB) sizes to suit varied frame load requirements:

Cat. Ref. NB (mm) H (mm) L (mm)
DT25 25 55 55
DT30 30 64 64
DT40 40 78 68
DT50 50 85 95

Applications

  • Symmetrical structural grids and lattice supports for large glass reactor systems.
  • Central intersections in support frames for tall borosilicate distillation columns requiring rigid four-way support.
  • Load-bearing nodes in multi-level process equipment platforms and pilot plant skeletons.
  • Designing cross-connections in laboratory benchtop rack systems.
  • Support structures for absorption columns, gas scrubbing units, and heat exchanger banks.

Why Choose Us?

Established in 1977, Goel Scientific Glass Works Ltd. (a Borosil Scientific company) is a global leader in industrial borosilicate glass systems and structural framework components. Serving over 2,800 customers worldwide, we manufacture the complete range of structural fittings, including double tees, couplings, and base plates, to rigorous dimensional tolerances.

By engineering both the borosilicate glass process equipment and the supporting modular frameworks under one roof, Goel Scientific ensures complete dimensional compatibility, precise socket clearances, and predictable load-bearing performance. Every structure fitting is cast from certified raw materials, dimensionally inspected, and finished with heavy galvanising or electropolishing for long service life in harsh chemical plant environments.

FAQs

A structure fittings double tee is used to connect four structural tubes at a central intersection in support frameworks for borosilicate glass process equipment. It handles symmetrical load transfer in two opposite directions from a central tube.

A Glass structure fittings double tee distributes loads across four axes from one node, delivering rigidity at complex intersections where a single-tee cascade would introduce cumulative alignment errors and load imbalance.

Yes, Structure Fittings Double Tee components are engineered with internal bores sized to match standard 25 mm, 30 mm, 40 mm, and 50 mm galvanised structure tube outer diameters. Grub screws lock the tubes securely into the sockets.

Yes, Double tee fittings are widely used in glass column support structures where the framework must carry substantial vertical loads while providing dual-branch lateral bracing at multiple heights.

Goel Scientific manufactures double tee fittings primarily in cast iron with hot-dip galvanised finishes, as well as optional stainless steel (SS 304 / SS 316) variants for aggressive service environments.