Oxy Propane advice before I mess something up please..

[[JP]]

Your cutting torch has an ANM nozzle for acetylene.
Just get a PNM nozzle for your cutting torch. Get a mid-size nozzle - 3/32" - will cut whatever you like, and has enough size to heat things pretty well.

Also you shouldn't use an acetylene reg on a propane tank, it's just not good practice. The hoses are different (and will rot if you use an acetylene hose on propane) so treat regs the same way.

https://weldalloys.com/catalogue/pnm-pnme-cutting-nozzles_30/

make sure it's all leak tested before you use it in anger - squirty bottle with soapy water is best for this, spray all over every joint and watch for bubbles.

and make sure you have some flashback arrestors on the reg end at least. They're cheap insurance against very nasty accidents!

Hi, yes I have replaced the hoses for brand new, propane hose.
But kept the acetylene regulator that came with the acetylene kit... is it dangerous to use that regulator on the propane bottle?
I also have arrestors fitted on the regulators.

thanks for the link to the cutting nozzles, I will get that, just in case one day I do need to cut something up, which I'm sure that day will come.

the main thing for me is heating rod up, that's the bit that I really want.

 

[[JP]]

Right... see if I got this right?

I'm thinking, buying this one here, propane/oxy mixer
https://www.weldingdirect.co.uk/Excalibur-T35PM---Mixer-Propane-Type-3--5

then get large size of these ones, 18 and 25? (as someone else told me those sizes should be good to focus the heat on one small area?), although not sure if they need something else to attach to the mixer? or do they screw straight on the mixer?
https://www.weldingdirect.co.uk/Noz-Alls---Swaged-Type-5-Oxy--Propane-Brazing-Nozzles

Also get one of these propane heating bent necks (12"):
https://www.weldingdirect.co.uk/Type-3--5-Propane-Super-Heating-Necks-H2290

and then a 6 flame nozzle for it?
https://www.weldingdirect.co.uk/Heating-Nozzle-PHT-Oxy--Propane

 

[Shedendman]

if you've got the money go for it,dont forget the O rings

 

[[JP]]

and I'm sorry, I think i have this in the wrong section,as the use is not for welding or brazing, is mainly for heating metal and bending. although at some point i'd like to try brazing. I know I can't weld with oxy/propane.

 

[[JP]]

if you've got the money go for it,dont forget the O rings

place I went this morning said can't get orings.... again, they were not very helpful.
I need to order a box of mixed size orings i guess.
or just buy a new mixer....

I come to realise I can't even order anything online as the bits I find, the thread type doesn't seem to match what I have. and online they don't mention what size/type the threads are.
I need to go to a different welding supply shop and see if they are more helpful

the red torch has like a coarse thread and the black a fine thread.
but online I can't see figure it out whats what.
feeling frustrated now.

 

[Shedendman]

Just get a new rosebud and a No10 nozzle for smaller stuff its all i use esp for heating i've smaller nozzles for brazing

 

[Shedendman]

place I went this morning said can't get orings.... again, they were not very helpful.
I need to order a box of mixed size orings i guess.
or just buy a new mixer....

I come to realise I can't even order anything online as the bits I find, the thread type doesn't seem to match what I have. and online they don't mention what size/type the threads are.
I need to go to a different welding supply shop and see if they are more helpful

the red torch has like a coarse thread and the black a fine thread.
but online I can't see figure it out whats what.
feeling frustrated now.

EBAY
https://www.ebay.co.uk/itm/50Pc-Ass...7:g:mrcAAOSwxOVb0yUp:rk:1:pf:1&frcectupt=true
For EG

 

[Shedendman]

google whats written on the torches hunt around,post a close up pic on here of the torches/threads,theres a lot of clever chaps here that'll suss it

 

[[JP]]

I got some photos.

As Munkul said earlier, I could just get a 3/32 PNM nozzle for my cutting torch, the black torch. But... I don't know what type of nozzle thread will go on my cutting attachment. I believe there's different sizes?
I have googled what's on the torchs but can't find much... find they are lightweight torches. then go on certain websites and the threads they show on their lightweigh are different. then there's type 5 torches.
mine, the black has a serrated thread top... the red doesnt... so are they both lightweight or one is type 5? all this confuses me and reason why I haven't ordered anything.

the thread types, the black one is serrated at the top, seems like a fine thread. the red looks like a coarse thread

This is the top of the cutting torch, that goes with the black torch, where I could just get the PNM 3/32 nozzle and use that for cutting and heating up a spot area, which is what I need to bend 15mm mild steel rod. I think wide area heating wouldn't be as good?
but not sure which type of nozzles will fit on here... I reckon there's larger sizes? or I may need an adaptor?
Like.. the nut that goes over the nozzle, here on the photo, would it just go over a PNM 3/32 nozzle??? is it standard size?

and finally, general torch photos. I have tried google.. can't find any of these.

maybe I'm being really picky with this and making it more complicated than what exactly is, but just want to be safe and make sure I'm not going to blow the garage up lol

or order a bunch of stuff and then find out nothing fits

 

[Kent]

Use the cutting torch to heat the 18mm bar. Propane is yhe way to go unless your welding "ofw"
Two options for the bar 1. Largish sise cutting nossle and dont press the lever
2. Propane heating nossle when your 02 dial wont work at all and you add the 02 by the lever alone (takrs practice to know when you have enough gas ignited and how to smoothly depress the lever)
18mm round is pretty easy with a big cutting nossle again propane cutting nossle!

Was doing some 30 mm round from mower heads just this week easy without even bothering with the heating nossle

 

[[JP]]

hi Kent, thanks for the feedback.

So from all I read about it seems like for what I need (heating 15 to 18mm mild steel rod and the odd cutting up to 5mm) I can just go with the cutting nozzle.
the 3/32 mentioned before?
Use that nozzle to heat up and also to cut.

if so, then I'd just need confirmation on this bit - the nut that goes over the nozzle, here on the 2nd photo, would it just go over a PNM 3/32 nozzle??? is it standard size?

then I guess I could just order this?
https://www.rapidwelding.com/dynamic/DisplayItem.aspx?c=PNM-NOZ&po=NM20

 

[Munkul]

I use a 3/32 nozzle for everything. 50x8 Flat bar, 100mm box section, whatever. Obviously on bigger pieces it's less efficient than a rosebud heating nozzle, but it still works fine.
Even a 1/16" nozzle would do 18mm round bar without trying.

if you have an ONM nozzle fitted to the torch already, then the same nut fits PNM nozzles also

 

[[JP]]

I use a 3/32 nozzle for everything. 50x8 Flat bar, 100mm box section, whatever. Obviously on bigger pieces it's less efficient than a rosebud heating nozzle, but it still works fine.
Even a 1/16" nozzle would do 18mm round bar without trying.

if you have an ONM nozzle fitted to the torch already, then the same nut fits PNM nozzles also

thank you for clarifying the fitting!
I think I'll go with the option of just buying a 3/32 nozzle and see how it goes.

smarter than go spend a load of money in bits if that nozzle will sufice for my needs

 

[500e]

O rings try truck or agri repair places they usually have boxes of different sizes "price=pence"

 

[Brad93]

Some mixers and nozzles aren’t suitable for propane.

 

[[JP]]

so it seems

 

[Kent]

Propane and acetylene require different nozzles . Propane must have the correct pipes and The correct regulator .

To get clean cuts you must have the correct nozzle size , if totally happy to get a raggy melt of a cut just use any but you will simply not get a nice cut without the correct tip .

It's very unlikely to get back flash to the bottles in propane though I have them fitted but just the non reset type. Acetylene is a complete different beasty though

starting out you will certainly melt some nozzles so get a few in the sizes you require . With practice it's far less common

 

[[JP]]

so, these are no good? I was told before that the acetylene regulator could be used with the propane as long as had 2 gauges?

 

[Shedendman]

My OP setup has OA gauges and work just fine

 

[Kent]

so, these are no good? I was told before that the acetylene regulator could be used with the propane as long as had 2 gauges?

Propane doesn't read correctly on gauges. Also propane tends to wreck some innards (not dure why but acetylene torches go beggered on the fuel adjust knob) . A propane reg is very cheap by comparison sans dial read out and just using a scale on the dial.
I rendered three torches useless before found out about the knobs going on acetylene type