I'm looking to buy some metal angle circles around 600mm. There must be something that's readily available around 25mm x 25mm ?. Something in the building trade? like a man hole surround? As long as its metal angle that's been bent into a circle? Any ideas?
Google 630dia fan flange, they used to do a one without holes in but I cannot seem to get hold of them now. Also do 400,450,500,560. Hope it helps.
It's a hazy memory I have of an old catalogue which sold everything conceivable to build any kind of trailer. The horse box had a radius at the sides to roof junction and you bought a full circle and cut it into quarters to for this.
thanks will see if I can find something. I need the ring to be an outer leg as in the return part of the angle been on the outside of the ring. It's good to know that there is a 630mm ducting but parts I've seen seem to all have a inner leg on any flange parts?