An SMS coupling (or SMS union) is a hygienic pipe connection system standardized by the Swedish Manufacturing Standard (SMS 1149). It is commonly used in industries requiring sanitary, easy-to-clean fittings—primarily:

• Food and beverage

• Dairy

• Pharmaceutical

• Cosmetics
  
   

  🔧 Key Components of an SMS Coupling:

• Male Part (Welded Liner)

• Female Part (Welded Nut or Weld Ferrule)

• When assembled, the nut compresses the gasket between the male and female parts, forming a leak-tight, hygienic seal.

• Nut (Hex or Round with Lugs) – used to tighten the union

• Gasket – for sealing (EPDM, NBR, PTFE, etc.)
   

  ✅ Features & Benefits:

• Hygienic Design: Minimal dead space to prevent bacterial growth.

• Easy to Clean: Suitable for CIP (Clean-In-Place) and SIP (Sterilize-In-Place).

• Robust and Reusable

• Tool-Free Assembly (in many cases)

• Made from stainless steel AISI 316L or 304

• Smooth internal finish (Ra < 0.8 µm usually)
   

  📦 Applications:

• Milk and juice processing

• Brewery piping

• Biopharmaceutical manufacturing

• Cosmetic ingredient handling