Hygienic fittings to ISO EN 10357-D cover metric stainless steel tubing and fittings for food, dairy, beverage, and pharmaceutical process lines. The standard defines outside diameters, wall thicknesses, and end preparations for tubes, bends, tees, reducers, and clamp unions used in wetted service. Ferrule geometry is dimensionally compatible with both the SMS 3017 series and IDF connections, allowing these fittings to be installed into existing SMS or IDF pipework. SMS ferrules use a flat gasket seat; IDF ferrules use a recessed groove. Euroflow supplies the Alfa Laval range, drawing on the manufacturer's extensive experience in hygienic process equipment.
Wetted parts are supplied in 1.4404 stainless steel (316L). This grade is selected over 1.4435 for the balance of corrosion resistance, weldability, and cost in installation material. Internal surface finish is Ra < 0.8 µm as standard. This is verified with a calibrated profilometer. Fittings pass 100% visual inspection. Ovality, squareness, and ferrule outside diameter are checked with calibrated equipment. Weld ends are prepared for orbital or manual welding. The assembled joint is crevice-free, with no internal cavities where product can accumulate. Surface roughness meets the requirements set by EHEDG and 3-A. Gaskets are available in EPDM, PTFE, silicone, and FKM (Viton).
For the full standard breakdown, tolerance tables, and comparison with SMS, IDF, DIN, and BS ranges, see the ISO EN 10357 guide.
