DS Complete Round-Nut Pipe Union Assembly

Complete Four-Piece DS Assembly & Component Drawings

The DS union assembly is shown in both assembled and separated views comprising a slotted round retaining nut (DS-13), a welding liner (DS-14), an externally threaded welding male end (DS-15), and a union seal ring (code series drawing).

Each of the four component tables on the source drawing covers seven nominal sizes from 1" to 4", listing round threads from Rd44×1/6" to Rd130×1/4" on the nut and male end alongside matching tube bores (22.4 mm to 97.6 mm) and outer diameters (28.5 mm to 105 mm).

DS vs. IDF & Nut Shape Source Discrepancy

While the page title, body text, and four-table engineering drawing all identify this product as a DS union with a slotted round nut, the webpage URL slug and two summary fields state IDF and Hexagon.

Because all six product photographs and the dimensional drawing depict the round-nut DS construction, this configuration retains the DS round-nut identity while noting the conflicting IDF/Hexagon metadata fields as unresolved; do not assume interchangeability with IDF unions.

Materials, Seal Selection & Maintenance

Listed in SS304 and SS316L (AISI 304 and AISI 316L) with Ra < 0.8 μm surface finish, these demountable unions serve brewing, beverage, dairy, fruit juice, and pharmaceutical pipelines.

The blue seal ring shown in the separated photographs does not establish elastomer compound; specify the required seal material alongside the selected DS union size.