Zhejiang Seamless Pipe Co., Ltd.
Zhejiang Seamless Pipe Co., Ltd.
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| Attribute | Specification |
|---|---|
| Product Name | Threaded Reducing Bushing |
| Material | Stainless Steel 316 / Casting Grade CF8M |
| Standard | ASTM A351 (Material) / MSS-SP-114 (Dimensions, ref.) |
| Fitting Type | Reducing Bushing, Hex Head |
| Connection | Male x Female Threaded NPT |
| Pressure Rating | Class 150 |
| Application | Piping Systems, Instrumentation, Adapting Ports |
| Size | Available in various reducing sizes (e.g., 1" x 3/4") |
A stainless steel bushing, also known as a male/female bushing, is a cleverly designed pipe fitting. It features both male and female threads and is designed to reduce the diameter of a pipe within an existing female-threaded port. For example, it can convert a DN50 port to a DN25 port. Compared to using a "reducing coupling + union" combination, a single bushing can achieve a diameter reduction, providing an ideal solution for saving installation space, reducing costs, and minimizing leaks in pipeline connections.
The 316/CF8M stainless steel material provides the bushing with enhanced corrosion resistance. The addition of molybdenum enhances its resistance to chlorides and various chemical media compared to 304 stainless steel. It is suitable for applications requiring more stringent conditions than standard, such as mild chemical processes, humid coastal air, or water treatment systems, ensuring the long-term integrity and reliability of threaded connections.
The bushing's compact design allows for reducing connections in limited spaces. It is widely used to connect small-diameter instrument or sampling branches from main pipe headers, to match the outlet port size of valves and pumps to smaller downstream pipes, and to adjust and adapt to different threaded port sizes during the assembly and maintenance of various equipment.
According to ASTM A351, the official designation for cast 316 stainless steel is CF8M. While the chemical compositions of the two differ slightly, the industry generally accepts that materials designated "316" meet the performance requirements of CF8M. Similarly, while SMLSCO product dimensions reference standards such as MSS-SP-114, they are primarily manufactured to widely accepted industry specifications to ensure market compatibility and practicality.