Views: 6 Author: Site Editor Publish Time: 2025-11-28 Origin: Site
In the design and construction of industrial pipeline systems, swage nipples are key components for achieving smooth connections of pipes of different diameters.
Their quality and performance directly affect the stability and safety of the entire pipeline system. The swage nipple produced in accordance with MSS SP-95 standard has become the preferred choice for many industries due to strict specification requirements and excellent product quality.
The MSS SP-95 standard is an important standard developed by the Valve and Fitting Manufacturers Standardization Society (MSS) in the United States for fittings such as reducers, and has wide recognition and influence in the global industrial field.
The MSS SP-95 standard specification covers the dimensions, tolerances, surface quality, markings, and materials of carbon steel and alloy steel reducers (reducers) with nominal diameters ranging from NPS 1/8 to NPS 12 (DN 6 to DN 300), as well as large pipe plugs (Bull Plug). The ports of these fittings can be processed into threaded, beveled, flat, grooved, or any combination of the above forms.
Types | CONC&ECC Swage Nipple |
Size | 1/4” - 12” / DN8 - DN300 |
Thickness | Sch 10 - Sch 160 / XXS |
Standard | MSS SP-95, SH/T3419 |
Types of Ends | PE、BE、THD |
Thread Form | NPT, PT, BSPP, BSPT, PF |
Carbon Steel | ASTM A105, 20# |
Alloy Steel | ASTM A182 F11 / 12 / 5 / 9 / 91 / 92 |
Stainless Steel | ASTM A182 F304/304L/304H, 316/316L, 310S, 317,347,904L |
Duplex Stainless Steel | ASTM A182 F51, F53, F44 |
The reducing short section can be further divided into concentric reducing short section and eccentric reducing short section:
Concentric Swage Nipple: The centerlines of the two ends of the pipe coincide, and the shape is symmetrical conical frustum. It is suitable for vertical pipelines or horizontal pipelines without special requirements for fluid flow direction, which can make the fluid smoothly transition and reduce turbulence.
Eccentric Swage Nipple: There is an eccentric distance between the centerlines of the two ends of the pipe, and it is commonly designed with a flat bottom or a flat top. The eccentric reducing short joint with a flat bottom is commonly used to prevent liquid accumulation in pipelines and is suitable for the inlet pipeline of pumps; The type with a flat top can avoid gas accumulation and is widely used in steam pipeline systems.
Swage nipple is a type of pipe fitting used to connect two pipes of different diameters. Its main function is to achieve a smooth transition of pipeline diameter, reduce fluid resistance inside the pipeline, and ensure smooth fluid transportation. Compared with other pipeline connection methods, swage nipple have the advantages of simple structure, easy installation, and reliable connection, and have been widely used in pipeline systems in many industries such as petroleum, chemical, power, metallurgy, and water supply and drainage.
The appearance of MSS SP-95 swage nipple is divided into concentric and eccentric designs. The two ends have different diameters, with one end having a larger diameter, which is called the large end; The other end has a smaller diameter and is called the small end. According to different usage environments and design requirements, the surface of the swage nipple can also be treated with anti-corrosion measures such as galvanizing, painting, etc., further improving the corrosion resistance and service life of the product.
Variable diameter connection of pipeline system: MSS SP-95 reducer short section is designed with different diameters at both ends, connecting the large end to the large diameter pipeline and the small end to the small diameter pipeline, ensuring the continuity and integrity of the pipeline system.
Reduced fluid transport resistance: When the fluid flows through the reducing short section, the flow velocity changes steadily, effectively reducing local resistance, reducing pressure loss, improving fluid transport efficiency, and reducing production costs for enterprises.
Connection adaptation between equipment and pipelines: MSS SP-95 tapered pipe can serve as a connecting bridge between equipment and pipelines. Based on the differences in equipment inlet and outlet diameters and pipeline diameters, suitable specifications of reducing short joints can be selected to achieve the connection between equipment and pipelines, ensuring the smooth progress of the production process.
The ends forms of MSS SP-95swage nipples are diverse, and can be processed into thread, groove, plain, bevel, or any combination of the above forms. Different port forms are suitable for different connection methods and usage scenarios, and users can choose according to their actual needs.
The MSS SP-95 pipe nipple with beveled ends is processed with beveled surfaces at specific angles on both ends. When welded to pipelines, it improves welding strength and sealing performance, making it suitable for high-pressure, high-temperature, and high reliability pipeline systems.
Usually used in conjunction with welding or special connectors, it is commonly used in pipeline scenarios with simple port structures and limited installation space.
This type of swage nipple has threads machined on the inner or outer wall of the ends, and is connected to pipes or threaded fittings through threads, which has the advantages of easy installation and disassembly, and no need for welding equipment. When using, pay attention to matching different thread specifications such as metric, imperial, and American systems.
The large end is designed with a beveled edge, which facilitates welding with the main pipeline and enhances the connection strength; The small end is a flat mouth that can be adapted to specific connection methods or small fittings, suitable for scenarios where the diameter of the pipeline changes and there are differentiated requirements for connection performance.
The large end groove is easy to weld, ensuring a secure connection with the main pipeline; Small end threads are convenient for quick installation with small threaded fittings, balancing high-strength welding and flexible connection requirements. They are commonly used in transition areas of different connection methods in industrial pipeline systems.
The large end flat mouth can be fixed by welding or special connectors, and the small end thread is convenient for quick assembly with small pipe fittings, suitable for scenarios where frequent disassembly and assembly are required at the end of the pipeline, such as pipeline connections for equipment inlet and outlet.
The large end flat mouth is compatible with multiple connection methods, while the small end groove design ensures the connection strength when welding with small pipelines. It is commonly used in situations where the pipeline diameter changes and the small end needs stable welding.
The large end thread facilitates quick connection with large threaded fittings, while the small end groove ensures the reliability of welding with small pipelines. It is suitable for transitional connections of different specifications of pipelines and meets installation requirements under complex working conditions.
The large end thread facilitates quick assembly with large pipe fittings, while the small end flat mouth can be connected to small pipes through welding or other means, making it suitable for parts of pipeline systems that require frequent disassembly and stable connection.
With its excellent performance and diverse port forms, MSS SP-95 reducer has a wide range of applications in many industries.
Petrochemical Industry
Power Industry
Metallurgical Industry
Water Supply and Drainage Industry
Other Industries
