IDF-14 Sanitary Welding Union Liner in SS304 / SS316L

Component Role & IDF Liner Seating Profile

The IDF-14 welding union liner is the unthreaded butt-weld half of an International Dairy Federation (IDF) hygienic pipe union. Its rear neck welds directly to standard inch-OD process tubing, while its front flange provides a rear thrust shoulder for an IDF-13H hex nut or IDF-13R round nut and a machined recess that locates the IDF gasket against a mating IDF-15 male end.

Material Grades & Dimensional Scope

Supplied in SS304 and SS316L stainless steel across six nominal sizes from 1.0" through 4.0" (1.0", 1.5", 2.0", 2.5", 3.0", and 4.0"), the IDF-14 liner matches tube outer diameters B from 25.4 mm (1.0") to 101.6 mm (4.0") with bore inner diameters A from 22.2 mm to 97.6 mm. Across the dimensional schedule, outer flange diameter C spans 33.8 mm to 120.6 mm and axial length H is 21.5 mm on 1.0"–3.0" sizes and 30 mm on the 4.0" size.

Assembly & Ordering Notes

Always place the IDF-13H or IDF-13R union nut onto the tube before butt-welding the IDF-14 liner in place. Specify stainless steel grade (SS304 or SS316L) and nominal tube size when ordering standalone liners or complete IDF union sets.