Standard: GB/T19228.1-2011
Unified Terminology：Nominal Diameter(DN, mm)｜Outer Diameter (GB Series Ⅱ, mm)
1.Union Coupling with Nut (EU Standard)
| Nominal Diameter | Outer Diameter(GB SeriesⅡ) |
|---|---|
| DN15×15 | 18.00×R1/2 |
| DN15×20 | 18.00×R3/4 |
| DN20×20 | 22.00×R3/4 |
| DN25×25 | 28.00×R1 |
| DN32×32 | 35.00×R1¼ |
| DN40×40 | 42.00×R1½ |
| DN50×50 | 54.00×R2 |
2.Hexagon Double Male Nipple (EU Standard)
| Nominal Diameter | Thread Spec |
|---|---|
| DN15 | 1/2″ |
| DN20 | 3/4″ |
| DN25 | 1″ |
| DN32 | 1¼” |
| DN40 | 1½” |
| DN50 | 2″ |
3.Short Type 90° Female Thread Elbow (EU Standard)
| Nominal Diameter | Outer Diameter(GB SeriesⅡ) |
|---|---|
| DN15×15 | 18.00×R1/2 |
| DN20×15 | 22.00×R1/2 |
| DN20×20 | 22.00×R3/4 |
| DN25×15 | 28.00×R1/2 |
| DN25×20 | 28.00×R3/4 |
| DN25×25 | 28.00×R1 |