26:05 Closing the torch operation: FIRST turn off Oxygen and then ACETYLENE( O before A). It allows you to check for leaks in the system. and it is recommended procedure in case of a malfunction. If you follow O before A shut off and you hear a pop ---> OXY valve is leaking. If there is a small flame clinging to the tip then the FUEL valve is leaking. By using O before A you get a check of the operation of the valves each time you use the torch. If you shut down A before O. you will get a pop and SOOT will be sucked back into the torch possibly clogging the gas passages.
Thanks for uploading this. This video answered a lot of questions for me. I learned my old Victor torch doesn't have any check valves or flashback arrestors.
"23:35 if there is too much heat don't adjust the pressures at the torch. CHANGE TO A SMALLER TIP" Just about every oxy welding video tells you otherwise. They say there is a range of heat adjustment you can achieve by increasing/decreasing the fuel mixture. You want to ensure the fuel pressure at the tip does not fall below a level which would see the flame sucked into the tip and torch (STARVATION of fuel) You also do not want the fuel flame to burn too far ahead of the tip (too high fuel pressure)
26:05 Closing the torch operation: FIRST turn off Oxygen and then ACETYLENE( O before A). It allows you to check for leaks in the system. and it is recommended procedure in case of a malfunction. If you follow O before A shut off and you hear a pop ---> OXY valve is leaking.
If there is a small flame clinging to the tip then the FUEL valve is leaking.
By using O before A you get a check of the operation of the valves each time you use the torch.
If you shut down A before O. you will get a pop and SOOT will be sucked back into the torch possibly clogging the gas passages.
Thanks for uploading this. This video answered a lot of questions for me. I learned my old Victor torch doesn't have any check valves or flashback arrestors.
Excellent video. Have respect for the torch it can kill you.
"23:35 if there is too much heat don't adjust the pressures at the torch. CHANGE TO A SMALLER TIP" Just about every oxy welding video tells you otherwise. They say there is a range of heat adjustment you can achieve by increasing/decreasing the fuel mixture. You want to ensure the fuel pressure at the tip does not fall below a level which would see the flame sucked into the tip and torch (STARVATION of fuel) You also do not want the fuel flame to burn too far ahead of the tip (too high fuel pressure)