DS-14 Sanitary Welding Union Liner in SS304 / SS316L

Danish Standard DS-14 sanitary welding union liner machined in SS304 or SS316L for DS hygienic pipe unions from 1" through 4". Butt-welds to tubing and presents an external shoulder and grooved gasket face for compression against a DS-15 male end by a DS-13R slotted round nut.

Material options	SS304, SS316L
Size range	1"~4"
Interface series	DS
Connection	Union (Welding Liner)
Shape	Round

Size

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Component Role & DS Union Geometry

The DS-14 welding union liner forms the plain butt-weld half of a Danish Standard (DS) hygienic pipe union. Its rear collar welds directly to stainless steel process tubing, while its front stepped shoulder provides a concentric retention seat for the DS-13R slotted round nut and a recessed sealing face that compresses the DS-14G elastomer gasket against a mating DS-15 threaded male end.

Material Grades, Surface Finish & Dimensional Scope

Manufactured in SS304 and SS316L stainless steel with an internal surface roughness rated at Ra < 0.8 um in the series specification schedule, the DS-14 liner covers seven nominal sizes from 1" through 4" (including 1 1/4", 1 1/2", 2", 2 1/2", and 3"). Across the drawing schedule, bore ID spans 22.4 mm to 97.6 mm, weld-end OD spans 28.5 mm to 105 mm, shoulder OD spans 40 mm to 124.6 mm, and overall height spans 16 mm to 29 mm.

Assembly & Ordering Notes

Before orbital or TIG butt-welding the DS-14 liner onto the tube end, slide the matching DS-13R slotted round nut over the pipe with its internal threads facing the joint. Confirm whether the DS-14 liner is ordered as an individual replacement spare or paired with a DS-13R nut, DS-15 male end, and DS-14G gasket.