NXF UNS N10276 2.4819/NiMo16Cr15W/C276 OD DN6-1500 Pressure 3000-9000lb ASME B16.11 Nickel Alloy Forging Socket Welding Tee

Super alloys or high performance alloys are available in a variety of shapes and contain elements in different combinations to obtain a specific result. These alloys are of three types that include iron-based, cobalt-based and

nickel-based alloys. The nickel-based and cobalt-based super alloys are available as cast or wrought based alloys according to composition and application.

Die Forging: Using a hydraulic die forging press or a forging hammer, the heated blank is pressed into a die containing a tee-shaped cavity to form the forged blank (which may retain a small amount of flash). For high-pressure, small-batch, or reducing-type fittings, a combination of open-die forging and semi-closed die forging may also be employed.Normalizing / Quenching + Tempering: Heat treatment is performed in accordance with material specifications (e.g., carbon steel is often normalized to refine grain structure, while alloy steel requires quenching and tempering) to enhance mechanical properties and improve resistance to hydrogen embrittlement.Machining: CNC lathes, drill presses, and milling machines are utilized to remove flash, face the ends, machine the socket bevels (in compliance with ASME B16.11 or GB/T 14383 standards), and finish the internal bores and branch diameters, thereby ensuring dimensional accuracy and surface finish.Non-Destructive Testing (NDT) & Pressure Testing: Magnetic Particle Testing (MT) or Penetrant Testing (PT) is conducted to inspect for surface cracks, while Ultrasonic Testing (UT) is performed on a sampling basis to detect internal defects. Additionally, a portion of the fittings—specifically those designated for 3000LB or 6000LB pressure ratings—undergo hydrostatic or pneumatic pressure testing.Surface Treatment & Marking: The fittings undergo surface treatment—such as sandblasting or pickling and passivation (for stainless steel)—followed by the application of anti-rust oil. Standardized markings are then stamped onto the fittings, indicating the material grade, applicable standard number, heat/batch number, and pressure rating.Final Inspection & Packaging: A final verification is conducted to re-check dimensions and confirm material composition via spectral analysis, along with a sampling inspection for leak-tightness. Once approved, the fittings are packaged in moisture-proof materials and prepared for shipment. This process differs from that of a "welded tee" (which involves hydraulically bulging or hot-pressing a pipe blank followed by welding on the branch pipe); the forged socket-weld tee is integrally forged as a single piece, featuring no seams. It is suitable for service conditions involving high pressure (≥ 3000 LB), high temperatures, or hazardous media, and complies with standards such as ASME B16.11 and GB/T 14383-2008.