SMS-14 Sanitary Long Welding Union Liner in SS304 / SS316L

Component Role & Long Weld-Neck Liner Profile

The SMS-14 long welding union liner is the extended-neck butt-weld liner for Swedish Manufacturing Standard (SMS) hygienic pipe unions. Compared with the short SMS-14S liner, its longer axial body (H from 15 mm to 30 mm) provides additional weld clearance between the tube weld zone and the SMS-13R slotted round nut.

Material Grades, Surface Finish & Dimensional Scope

Produced in SS304 and SS316L stainless steel with a surface finish rated at Ra < 0.8 um in the series specification schedule, the SMS-14 liner covers eight rows in the dimensional schedule: 25, 32, 38, 51, 63.5, 76.1, 101.6 (Max), and 101.6 (Min). Bore ID A spans 22.5 mm to 97.6 mm, weld-end OD B spans 25 mm to 101.6 mm, shoulder OD C spans 35.5 mm to 127 mm (101.6 Max) or 118 mm (101.6 Min), and overall height H spans 15 mm to 30 mm.

101.6 mm Shoulder Options & Ordering Notes

When specifying the 101.6 mm size, note that the dimensional table provides two shoulder diameters to match the corresponding SMS union series: 101.6 (Max) with C = 127 mm and H = 24 mm, and 101.6 (Min) with C = 118 mm and H = 30 mm. Slide the SMS-13R nut onto the tube before butt-welding the liner.