SMS Stainless Steel Round Nut Fastening Coupling: A Pipeline Connection Component for High-Hygiene Standard Industries

The SMS stainless steel round nut fastening coupling is a pipeline connection component specifically designed for industries with high hygiene standards, such as food, pharmaceuticals, dairy, and chemicals. Its core features and applications are outlined as follows:

Core Structure

This coupling consists of a stainless steel round nut, an external threaded joint, and a sealing gasket. The round nut and the external threaded joint are connected through thread engagement, while the sealing gasket is placed within the U-shaped sealing groove of the joint, forming a reliable seal under pressure. The materials used are predominantly 304 or 316L stainless steel, which are corrosion-resistant and high-temperature resistant, meeting hygiene-grade requirements.

Core Advantages

Hygiene-Grade Design

• The inner wall is polished to a surface roughness of Ra < 0.4μm, ensuring a smooth and dead-angle-free surface that prevents microbial growth. It supports CIP (Cleaning in Place) and SIP (Sterilization in Place), complying with GMP regulations.

Rapid Assembly and Disassembly

• The threaded connection method allows for tool-free manual engagement, enabling quick connection and disconnection of pipelines. This is particularly suitable for scenarios requiring frequent maintenance or cleaning.

Reliable Sealing

• Utilizing food-grade silicone rubber or polytetrafluoroethylene (PTFE) gaskets, combined with the U-shaped sealing groove design, multiple seals are formed. The coupling can withstand pressures ranging from 6 to 10 bar, effectively preventing fluid leakage.

Standardized Compatibility

• Adhering to international standards such as SMS, ISO, and DIN, this coupling can be interchanged with pipe fittings from other brands and supports the connection requirements of hard pipes, soft pipes, and pipes with different diameters.

Application Scenarios

• Food and Beverage Industry: Used for aseptic pipeline connections in the production lines of dairy products, beer, fruit juices, etc., preventing impurities from entering or media contamination.

• Pharmaceutical and Biotechnology: Suitable for the transmission of high-purity fluids such as vaccines and biological agents, supporting steam sterilization and ensuring no cross-contamination.

• Chemical and Fine Chemical Industry: For transporting corrosive media (such as acid and alkali solutions), the 316L stainless steel or fluorine-lined models can resist strong chemical erosion.

Selection Considerations

• Material Matching: Choose 304 stainless steel for conventional media and 316L or fluorine-lined models for highly corrosive environments.

• Size and Pressure: Select the appropriate thread specification according to the pipe diameter (e.g., DN25-DN100), and confirm the system pressure range to avoid overpressure use.