NXF UNS S20910 XM-19 OD DN6-DN1200 Pressure 3000-9000lb Special Stainless Steel Forging Socket Welding Union

1. Raw Material Selection and Pre-treatment: High-quality raw materials such as carbon steel, stainless steel, and duplex steel conforming to ASME B16.11 and GB/T 14383 standards are selected. Material testing and dimensional inspection are performed first, and oxide scale, oil stains, and impurities are removed from the surface of the raw materials to ensure they are free of cracks, porosity, and other defects, laying the foundation for subsequent processing.

2. Forging and Shaping: Using precision die forging technology, the pre-treated raw materials are heated to the specified temperature and forged into core components such as the connector body, nut, and connector body using forging equipment. This ensures the dimensional accuracy and mechanical properties of each component, resulting in a dense structure and improved overall pressure resistance.

3. Precision Machining: The forged components undergo precision machining such as turning, milling, and drilling. Special attention is paid to machining key areas such as the socket joint, sealing surface, and threads. Strict control is maintained over interface dimensions and sealing surface finish to ensure tight socket welding, smooth threaded connections, and compliance with assembly requirements.

4. Welding Process: Professional welding is performed on the socket joint using socket welding technology to ensure a full weld, free of slag inclusions and porosity. After welding, weld flaw detection is performed to identify and eliminate welding defects, ensuring weld strength and sealing performance and preventing leakage problems during subsequent use.

5. Surface Treatment: Based on customer requirements and operating conditions, the finished product undergoes surface treatments such as galvanizing, chrome plating, and pickling passivation. This enhances the product's corrosion resistance and rust prevention, extends its service life, and improves its appearance, adapting to the needs of different industrial environments.

6. Sealing and Pressure Testing: After assembly of all components, sealing performance and pressure resistance tests are conducted to simulate actual working pressure, eliminating potential leakage risks in sealing surfaces and welds. This ensures the product achieves zero leakage under high pressure and high temperature conditions, meeting industry standards.

7. Finished Product Inspection and Packaging: Conduct final dimensional verification and visual inspection on qualified products, and reject unqualified products; qualified products are packaged according to specifications, labeled with product model, material, pressure rating and other information, and protective measures are taken to facilitate storage, transportation and subsequent use.