pipe threads - tips&tricks

[brikgreg]

hello colegues

Im in HVAC buisiness as you but Im from Slovenia. I was looking similar forums in my country, but no luck so far (too small market)
Im preparing tips&tricks manual for young plumbers in area of pippe threading (water, heating, gas). here we mostly use REMS machines
which is same as anywhere. we have imperial units 1/2", 3/4"... threads are standard from DIN, DVGW so they are same as in your country

well if any of you have some useful tips for this work, or you have manual you could recomend or book or just want to say hello,
please do that

 

[Simon F]

Hello brikgreg, welcome to the forum.
hope you find the forum useful.
only threads have ever used are BSP (British standard pipe thread)

 

[dancinplumba]

hi brikgreg and welcome

 

[PlumbBobBob]

welcome to the forums

 

[REDSAW]

welcome

i am only familiar with these threads

 

[SimonG]

Welcome along

 

[Subby]

Rough up the threads with a hacksaw blade before applying your loctite/hemp and jointing compound.
Use cutting oil whilst threading the pipe.

 

[brikgreg]

thank you for your kind replys. I think its not important what kind threads you use BSP or DVGW, its technik and experience
(size dont matter roughing up threads is for better sealing, so material cut into opposite side? or just better hold loctite?, nice tip, thx Subby.
I have question if anyone like to answer -
in case you use loctite 55
how many times you wrap over threads? more than loctite says?
I notice older plumbers do that, just for extra safety

 

[josh]

I always end up putting more loctite than it says but another plumber i work with now and again does stick to it more or less and doesn't get any problems, amazing stuff.

 

[Mike Jackson]

Putting too much loctite 55 on can end up causing problems as it can bunch and push off the thread. I use 6 turns as per the instructions and don't get leaks.

 

[TBServices]

Putting too much loctite 55 on can end up causing problems as it can bunch and push off the thread. I use 6 turns as per the instructions and don't get leaks.

Does it go inside the threads or randomly all over?

 

[josh]

all over, does look a biy messy at times i admit.
should just be more confident in it shouldnt i.

 

[TBServices]

all over, does look a biy messy at times i admit.
should just be more confident in it shouldnt i.

I find it weird lol

 

[brikgreg]

for Loctite - Im use like says in red tube, x-wraps per size and maybe 1-2 more, I try to get inside of threads but that I think its no big deal. thank you, thankyou, great help!

in my country threading machines are more or less without automatic coling system so we spraying cooling lubricants. question is how often do you apply lubricant on threading surface? you use any kind of visual rule like too much smoke to much lubricant? or ?

 

[Mike Jackson]

Does it go inside the threads or randomly all over?

I run it up the thread.

 

[Subby]

As mentioned before, follow what it says on the pot for how many turns of loctite 55 you need. You should start at the end of the pipe, going clockwise following the threads, but you don't have to follow them perfectly.
Then use jointing compound over the top of the loctite. There are different types of jointing compound for what the pipe is carrying (gas, potable water, heating water etc).

Any screwed joint over 1" (28mm) will be difficult to do up, so use a chain vise and a set of stillsons (pipe wrench).
It is possible to overtighten things, and brass fittings can split when steel is screwed in with too much force.

As for lubricant, use the correct stuff (cutting oil), you can get it in an aerosol spray. Too much smoke = not enough oil, as the pipe is getting too hot. We tend to spray ours the whole time the thread is being cut.

 

[stevetheplumber]

Cutting oil keeps the dies cool and they last longer

 

[brikgreg]

if you're in situation to to teach young aprentice how to make threads on pipes, what would you told them?
what basic rules that they should memorize forever?
Suby, Steve and others, I'd really like to have your opinion on this, also from any experienced plumbers out there