Double-Flanged Tapers
Connect flanged components of different nominal sizes. A double-flanged reducer connects different nominal flange sizes. Use the dedicated product drawing to match the installation arrangement.
Connection interface
Connects to a compatible mating flange. Select by flange DN, drilling, gasket and service conditions; the flange interface does not imply compatibility with every pipe material.
Product overview
Connect flanged components of different nominal sizes.
Connection interface
Connects to a compatible mating flange. Select by flange DN, drilling, gasket and service conditions; the flange interface does not imply compatibility with every pipe material.
Connection arrangement
Larger flange DN → smaller flange dn
Connection and selection
Two flange sizes
Specify both nominal sizes and the installation length. Use the taper drawing for the selected pair.
Flange interface
Match the flange DN and drilling to the mating component. Select the gasket and fasteners for the specified assembly.
Size and installation
Check the product-specific drawing for the required lengths and clearances. Confirm current pressure applicability and available sizes for the project.
Catalogue dimensions
Source: AQUAFITTING fixed-flange and T-type joint catalogue, page 26–27. Dimension symbols follow the corresponding source drawing. Confirm the selected configuration and current dimensions before ordering. The two 400 × 300 length variants are retained separately; confirm the selected configuration.
| DN × dn | T | t | L |
|---|---|---|---|
| 100 × 80 | 7.2 | 7.0 | 200 |
| 150 × 80 | 7.8 | 7.0 | 400 |
| 150 × 100 | 7.8 | 7.2 | 300 |
| 200 × 100 | 8.4 | 7.2 | 600 |
| 200 × 150 | 8.4 | 7.8 | 300 |
| 250 × 150 | 9.0 | 7.8 | 600 |
| 250 × 200 | 9.0 | 8.4 | 300 |
| 300 × 150 | 9.6 | 7.8 | 650 |
| 300 × 200 | 9.6 | 8.4 | 600 |
| 300 × 250 | 9.6 | 9.0 | 300 |
| 350 × 200 | 10.2 | 8.4 | 650 |
| 350 × 250 | 10.2 | 9.0 | 600 |
| 350 × 300 | 10.2 | 9.6 | 300 |
| 400 × 200 | 10.8 | 8.4 | 700 |
| 400 × 250 | 10.8 | 9.0 | 650 |
| 400 × 300 | 10.8 | 9.6 | 300 |
| 400 × 300 | 10.8 | 9.6 | 600 |
| 400 × 350 | 10.8 | 10.2 | 300 |
| 450 × 250 | 11.4 | 9.0 | 700 |
| 450 × 300 | 11.4 | 9.6 | 650 |
| 450 × 350 | 11.4 | 10.2 | 600 |
| 450 × 400 | 11.4 | 10.8 | 300 |
| 500 × 300 | 12.0 | 9.6 | 700 |
| 500 × 350 | 12.0 | 10.2 | 650 |
| 500 × 400 | 12.0 | 10.8 | 600 |
| 500 × 450 | 12.0 | 11.4 | 300 |
| 600 × 350 | 13.2 | 10.2 | 750 |
| 600 × 400 | 13.2 | 10.8 | 700 |
| 600 × 450 | 13.2 | 11.4 | 650 |
| 600 × 500 | 13.2 | 12.0 | 600 |
| 700 × 400 | 14.4 | 10.8 | 800 |
| 700 × 450 | 14.4 | 11.4 | 750 |
| 700 × 500 | 14.4 | 12.0 | 700 |
| 700 × 600 | 14.4 | 13.2 | 600 |
| 800 × 450 | 15.6 | 11.4 | 900 |
| 800 × 500 | 15.6 | 12.0 | 800 |
| 800 × 600 | 15.6 | 13.2 | 700 |
| 800 × 700 | 15.6 | 14.4 | 600 |
| 900 × 500 | 16.8 | 12.0 | 1000 |
| 900 × 600 | 16.8 | 13.2 | 800 |
| 900 × 700 | 16.8 | 14.4 | 700 |
| 900 × 800 | 16.8 | 15.6 | 600 |
| 1000 × 600 | 18 | 13.2 | 1000 |
| 1000 × 700 | 18 | 14.4 | 800 |
| 1000 × 800 | 18 | 15.6 | 700 |
| 1000 × 900 | 18 | 16.8 | 600 |
| 1100 × 700 | 19.2 | 14.4 | 1000 |
| 1100 × 800 | 19.2 | 15.6 | 800 |
| 1100 × 900 | 19.2 | 16.8 | 700 |
| 1100 × 1000 | 19.2 | 18.0 | 600 |
| 1200 × 700 | 20.4 | 14.4 | 1345 |
| 1200 × 800 | 20.4 | 15.6 | 1160 |
| 1200 × 900 | 20.4 | 16.8 | 975 |
| 1200 × 1000 | 20.4 | 18.0 | 790 |
| 1200 × 1100 | 20.4 | 19.2 | 605 |
| 1400 × 800 | 22.8 | 15.6 | 1590 |
| 1400 × 900 | 22.8 | 16.8 | 1405 |
| 1400 × 1000 | 22.8 | 18.0 | 1220 |
| 1400 × 1100 | 22.8 | 19.2 | 1035 |
| 1400 × 1200 | 22.8 | 20.4 | 850 |
| 1500 × 900 | 24.0 | 16.8 | 1620 |
| 1500 × 1000 | 24.0 | 18.0 | 1435 |
| 1500 × 1100 | 24.0 | 19.2 | 1250 |
| 1500 × 1200 | 24.0 | 20.4 | 1065 |
| 1500 × 1400 | 24.0 | 22.8 | 695 |
| 1600 × 1000 | 25.2 | 18.0 | 1650 |
| 1600 × 1100 | 25.2 | 19.2 | 1465 |
| 1600 × 1200 | 25.2 | 20.4 | 1280 |
| 1600 × 1400 | 25.2 | 22.8 | 910 |
| 1600 × 1500 | 25.2 | 24.0 | 725 |
| 1800 × 1100 | 27.6 | 19.2 | 1895 |
| 1800 × 1200 | 27.6 | 20.4 | 1710 |
| 1800 × 1400 | 27.6 | 22.8 | 1340 |
| 1800 × 1500 | 27.6 | 24.0 | 1155 |
| 1800 × 1600 | 27.6 | 25.2 | 970 |
| 2000 × 1200 | 30 | 20.4 | 2140 |
| 2000 × 1400 | 30 | 22.8 | 1770 |
| 2000 × 1500 | 30 | 24.0 | 1585 |
| 2000 × 1600 | 30 | 25.2 | 1400 |
| 2000 × 1800 | 30 | 27.6 | 1030 |
Technical Downloads
Product FAQs
What should I send for a Double-Flanged Tapers enquiry?
Send the required DN/OD and any main/branch or inlet/outlet size, working pressure, flange drilling or socket/pipe details, quantity, destination and any project drawing or document requirement.
What technical evidence is available for Double-Flanged Tapers?
The ISO2531 fixed-flange catalogue (pages 26-27) shows DN x dn, T, t and L rows plus Mass columns labelled PN10, PN16 and PN25, with taper drawing. Dimensions are confirmed against your enquiry before quotation.
Which details still require Aquafitting confirmation?
Confirm current size availability, working pressure, material, gasket, coating, flange drilling or socket/pipe interface, dimensions, mass, standard applicability, documents and project suitability before quotation.
Product selection
product name; required DN/OD and any main/branch or inlet/outlet size; working pressure or pressure class; flange drilling or socket/pipe details; material/coating requirement; quantity; destination; required documents; project drawing if available




