Flange
Round flanges
Application
Round flanges can be mounted on both galvanized and black steel ventilation products. The main scope of flanged products: smoke removal, pneumatic transport, aspiration, connection to fans with flange connection.
Round Duct Flange Options
| Round Flange Specifications | ||||
| Inner diameter D,mm | Bolt holes | Weight m,kg | Material | |
| Size, mm | Quantity, pcs | |||
| 100 | 9х16 | 4 | 0,24 | sheet steel, 3mm |
| 125 | 9х16 | 4 | 0,28 | |
| 140 | 9х16 | 4 | 0,31 | |
| 160 | 9х16 | 6 | 0,34 | |
| 180 | 9х16 | 6 | 0,38 | |
| 200 | 9х16 | 6 | 0,55 | |
| 225 | 9х16 | 6 | 0,62 | |
| 250 | 9х16 | 6 | 0,68 | |
| 280 | 9х16 | 6 | 0,75 | |
| 315 | 9х16 | 6 | 0,84 | |
| 355 | 9х16 | 8 | 1,63 | угловая сталь, 25х25х3мм |
| 400 | 9х16 | 8 | 1,84 | |
| 450 | 9х16 | 8 | 2,06 | |
| 500 | 9х16 | 8 | 2,29 | |
| 560 | 9х16 | 10 | 2,64 | |
| 630 | 9х16 | 10 | 2,96 | |
| 710 | 9х16 | 12 | 3,32 | |
| 800 | 9х16 | 12 | 3,75 | угловая сталь 32х32х4мм |
| 900 | 9х16 | 16 | 5,51 | |
| 1000 | 9х16 | 16 | 6,11 | |
| 1120 | 9х16 | 18 | 7,74 | |
| 1250 | 9х16 | 18 | 8,62 | |
| 1400 | 9х16 | 22 | 9,64 | |
| Note: You can make more or less holes on the round flange as needed. Flanges can also be made without holes. | ||||
Production
Strip flanges are obtained by cold rolling the strip through the rolls of the machine. The flange may consist of a single piece of strip, or of halves, or of several parts. All parts of the flange are securely welded together. Flanges with a diameter of 225 mm or more are made in the following way: the corner is cold rolled between the rollers of the machine. Next, the ends of the corner are fastened by welding.
Using a punching machine, oval holes are made on the flange (along the circumference). The finished flange is covered with primer.
Flanging
The process of attaching a flange to a duct or fitting is called flanging. The quality of a flanged product depends on the reliability of the connection between the product and the flange. To flange a round part, a ridge is made along its diameter at a distance of 15-20 mm from the edge. The flange is put on the product in such a way that it rests on the ridge. The metal emerging from the top of the flange is tapped in a circle, thus firmly pressing the flange.
Installation
Round flanged products are connected to each other using a bolted connection. The flanges of the products are aligned so that the holes match. Next, fix the connection with a bolt and nut. It is recommended to use sealant between flanges.