Focus on SMS connections

Les raccords SMS (Swedish Manufacturing Standard) font partie des raccords les plus utilisés en industrie alimentaire, chimique et pharmaceutique. Ils sont composés de 4 pièces :

Swedish SMS Fittings are among the most widely used fittings in the food, chemical and pharmaceutical industries. They consist of 4 parts:

  • A male threaded nose, with a round thread, which accommodates the seal
  • A smooth, flat-faced weld-on part
  • A seal with a square or L-shaped cross-section
  • A round notched and chamfered nut

SMS Fitting

SMS diameters are usually given in mm, according to the metric standard, but they can also be found in inches (see table of correspondences). They are available from DN25 to DN104, and machined in 316L stainless steel.

The use of an L-section gasket improves the hygiene of the fitting by eliminating the annular retention area that exists in SMS fittings using a standard square gasket. The seals offered by Sofra Inox are FDA and 3A compliant.

They are used in installations subject to moderate pressure (30 bar max).

SMS fittings are easy to install but are not designed for regular disassembly, as the alignment of the pipework must be perfect.

Correspondence of diameters

DN (mm)25385163.576104
DN (inches)1"1"½2"2"½3"4"


See our range of SMS fittings