View Single Post
  #38  
Old 2010-07-25, 6:07pm
Mr. Meker's Avatar
Mr. Meker Mr. Meker is offline
Senior Member
 
Join Date: May 31, 2009
Posts: 368
Default

I would like to add some of my own experience

-The minor is not fully powered on 14cfh of oxygen. I put around 20cfh through mine and would happily use 30.

Then some premix tips from National

OX3-7lpm
OX-01.5lpm

Also, measuring the flame temperature is not relevant. This is because a propane air flame burns at around 2000C. Silica, the main ingredient in glass and a glass it self, melts at around 1650C. There is no way that you will ever melt silica with a hothead in a usable quantity.

A propane oxygen flame burns around 2500C. Silica boils at 2230C. This means that by the time the glass reaches the temperature of the flame, it will have evaporated, leaving nothing but molten calcium oxide.

The "official" softening temperature of borosilicate glass is 820C.
__________________
Melting boro with a National 3A and and two Devilbiss 5lpm 10psi concentrators.

To view links or images in signatures your post count must be 5 or greater. You currently have 0 posts.
Reply With Quote