Fabricated tee fittings are engineered by welding a branch pipe directly onto a run pipe or by rolling and welding steel plates to accommodate large diameters and non-standard wall thicknesses. The manufacturing process utilizes precision contouring of the intersection followed by submerged arc or manual welding, strictly adhering to Welding Procedure Specifications (WPS) to ensure fusion and structural continuity.
Application Areas
These components are particularly advantageous in low-to-medium pressure infrastructure where large flow volumes are required. The fabricated tee is extensively utilized in municipal water transmission networks, sewage drainage systems, and circulating water lines in thermal power plants. In the oil and gas sector, they serve as economical junction points for gathering lines and transportation pipelines that do not require the ultra-high pressure ratings of seamless forged fittings. Additionally, they are frequently deployed in large-scale HVAC systems and desalination projects due to their design flexibility and cost-effectiveness.
Certificates and Standards
We manufacture these fittings in accordance with recognized industry standards such as ASME B31.3, ASME B16.9 (dimensional reference), and AWWA C208. Our quality management system is certified to ISO9001 and ISO14001, and we hold the EU Pressure Equipment Directive (PED) certification. These credentials verify that our welding processes and material sourcing meet the stringent safety and traceability requirements necessary for international infrastructure projects.
Our Factory
Located in the Yanshan County Development Zone, our production facility features advanced plate rolling machines and automatic submerged arc welding stations capable of handling heavy wall thicknesses. When manufacturing a fabricated tee, we offer full customization regarding the branch angle (90°, 45°, or custom degrees), diameter ratios (reducing or equal), and length. Our annual output of 300,000 tons ensures we can meet the delivery timelines of major wholesale projects, and we maintain rigorous quality control by conducting 100% X-ray (RT) or ultrasonic testing (UT) on all weld seams to detect and eliminate any potential defects before final machining.
Frequently Asked Questions (FAQ)
Q: How do you ensure the strength of the weld joint?
A: We employ certified welders and strictly follow approved Welding Procedure Specifications (WPS). After welding, we perform Non-Destructive Testing (NDT), such as Radiographic Testing (RT) or Ultrasonic Testing (UT), to ensure full penetration and the absence of cracks or porosity.
Q: Can you manufacture tees with different wall thicknesses for the run and branch?
A: Yes. Since these are fabricated from pipe or plate, we can easily customize the wall thickness of the main run and the branch independently to meet your specific design pressure and stress analysis requirements.
Q: Do you offer reinforcement for high-pressure applications?
A: Yes. We can add reinforcing pads (saddle plates) or use a thicker wall pipe for the branch (self-reinforced) to ensure the tee can withstand the internal pressure, complying with ASME B31.3 area replacement rules.
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