DIN / ISO Tube-Series Complete Pipe Union Assembly

DIN / ISO Tube-Series Union Assembly

This complete union assembly combines a slotted round closure nut with a DIN / ISO welding liner, a DIN / ISO welding male end, and a mating seal ring.

Unlike standard metric DIN tube ends, the DIN/ISO union drawing tables machine the weld neck bore (A) and outer diameter (B) to match ISO tube outside diameters while retaining DIN round (Rd) union threads.

Material Options & 12-Row Dimensional Tables

The series specification lists SS304 and SS316L (AISI 304 and AISI 316L) across DN15 to DN150 with Ra < 0.8 μm surface finish. On the source drawing, both the Welding Liner and Welding Male tables contain 12 rows.

In both drawing tables, the first column (labeled DN on the graphic) prints the literal outer diameter values from 17.2 to 168.3 (with bore A from 14 to 163.1, column D from 10 to 150, and male threads C from Rd28×1/8" to Rd190×1/4"). Select by matching the exact tube OD and wall thickness to the printed row.

Hygienic Applications & Interface Scope

Designed for demountable process connections in beer, beverage, dairy, fruit juice, pharmaceutical, and biological lines where routine seal inspection and replacement are required.

Other union families mentioned in the supplier's general catalog text (such as SMS, IDF, or RJT) represent separate product series and are not interchangeable with DIN / ISO union threads.