DIN 15S Short Weld Union Male End

Short Weld Neck & External Union Thread Construction

The DIN 15S short welding male end integrates a short butt-weld neck with an external round (RD) thread and recessed seal face. It mates with a corresponding DIN union nut, short liner, and union seal ring where axial installation length is shorter than long-neck or expanding union ends.

Source gallery positions 1 to 3 show the short male component and its fitted seal ring; position 4 shows an externally threaded male end with a blue seal ring but without a retaining nut, so it does not represent a complete union assembly.

Material Grades & DIN Short Male Dimensions

Offered in SS304 and SS316L (AISI 304 and AISI 316L) with a stated surface finish of Ra < 0.8 μm, the DIN Short welding male drawing covers nine nominal sizes from DN15 to DN100.

Across DN15 to DN100, bore A spans 16 mm to 100 mm, weld OD B spans 19 mm to 104 mm, axial length F spans 17 mm to 30 mm, and external thread C spans RD34×1/8 to RD130×1/4. The companion short-liner table in the series documentation remains a separate mating reference.

Process Applications & Seal Selection

Used in dairy, food, beer, beverage, fruit juice, and pharmaceutical process piping, the demountable union interface allows quick joint separation for seal inspection and replacement.

Because seal color in source photography does not verify elastomer composition, specify the required seal material separately for the process fluid and cleaning temperature.