MSS SP83 Socket Welding (SW) and Threaded Steel Pipe Unions are forged pipe fittings compliant with the MSS SP83 standard. Key specifications include: size range from 1/8" to 3" (NPS 1/8 – NPS 3) and pressure rating of 3000 psi (Class 3000). These unions are designed for reliable transportation of liquids, particulates, and gases, widely adopted in industrial pipelines across chemical processing, oil refining, boiler systems, power generation, food processing, and other relevant fields.