Lateral tees are produced primarily through hot/cold extrusion, hydraulic bulges, or welded fabrication. The process involves cutting a billet, heating (if hot extrusion), forming the branch using a punch or pressure, and finishing with beveling, cleaning, and coating. * Hot Extrusion/Forming: A pipe blank is heated, placed in a mold, and a branch is stretched out using a punch. This method is ideal for large-diameter, thick-walled pipes, using radial compression to supply metal to the branch.
* Welded Fabrication: Often used for specific, high-angle, or custom applications where a branch pipe is cut and welded onto a main pipe.
Processing Steps
1. Preparation: Inspection of raw materials (steel, stainless steel, alloys) and cutting pipe to size.
2. Forming: Either hydraulic bulge or hot/cold press forming the branch.
3. Heat Treatment: Essential for alleviating stress from cold-forming, particularly in cold-formed products.
4. Finishing & Machining: Beveling the ends for welding (butt welding), cleaning, and removing excess material.
5. Testing & Inspection: Quality checks include checking for surface cracks using dye penetrants or magnetic particles, and ensuring dimensional compliance with standards
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