DIN 15R Expanding Union Male End

DIN 15R Expanding Male Geometry & Mating Scope

The DIN 15R expanding male end combines an external round (RD) thread and union sealing face on the joint side with an extended internal socket containing annular retention grooves on the tube side. It pairs with a mating DIN union nut, union seal, and liner to create a demountable pipeline joint.

While the series specification also embeds the companion DIN-14R expanding liner chart for reference, this configuration covers the DIN-15R externally threaded male component specifically.

Material Grades & Dimensional Coverage

Listed in SS304 and SS316L (AISI 304 and AISI 316L) with a surface finish of Ra < 0.8 μm, the DIN-15R drawing table spans 11 nominal sizes from DN15 to DN150 with external thread callouts from RD 34×1/8 to RD 190×1/4.

Match dimensions A, B, C, thread D, groove allowance E, and overall length F directly from the DIN-15R drawing row for the selected pipe size.

Tube-End Joining Boundary & Maintenance

Although the supplier designates this series as an expanding male end, the source documentation provides no expansion tooling specification, tube wall deformation allowance, or installation procedure; the tube-to-fitting joining process must be validated separately.

In dairy, food, beer, beverage, and pharmaceutical lines, unthreading the mating union nut allows rapid inspection and replacement of the union seal.