pointless curiosity

[BuiltnotBought]

Evening All!

so I was letting my brain wonder today while doing tedious brain numbing work and had ended up at a point of curiosity...

how do you weld in sub zero temps? do you just have to prepare heat and slow the cooling process? or is it more avoiding doing that work out side in those sort of temps ! ?
I realise in the UK it isn't such an issue, but in real countries where it gets really cold (like Canada, with there steady -40C) surely there comes a point when even pretty heating is unachievable, but jobs still need to be fixed!

Anyway, just a though I had.


chears!

 

[Maker]

I think inductive heating jackets are used for for this kind of thing?

 

[rory1]

I overwintered on an Antarctic research jack up on an ice shelf in 2010/2011, during winter the temperatures dropped below 45c below. Hence the avatar

Anything that we repaired outside in winter would only be "temporary" and would be looked at again in the summer ( probably got as warm as -5 on a very nice day)

During the summer lots of construction, steel erection and radio mast erection was completed using nothing more special than the methods that we would use here for non tested stuff , a little preheat with oxy fuel, whatever rods were required were kept in a quiver to keep them dry and then wrap and insulate the job and leave to cool.

The main problem was trying to keep your work area dry, the snow and spindrift gets everywhere and you can't put anything down without it being covered in snow.

there were WSP's for some of the structural stuff but most of it was non critical, if you were talking pipe work or pressure vessels etc then I'm sure you would use ceramic heat mats or similar to prevent the job cooling too quickly.


I posted about it before I got posted out there
http://www.mig-welding.co.uk/forum/threads/any-one-experienced-in-real-cold-weather-welds.20895/

 

[Maker]

I overwintered on an Antarctic research jack up on an ice shelf in 2010/2011, during winter the temperatures dropped below 45c below. Hence the avatar

Anything that we repaired outside in winter would only be "temporary" and would be looked at again in the summer ( probably got as warm as -5 on a very nice day)

During the summer lots of construction, steel erection and radio mast erection was completed using nothing more special than the methods that we would use here for non tested stuff , a little preheat with oxy fuel, whatever rods were required were kept in a quiver to keep them dry and then wrap and insulate the job and leave to cool.

The main problem was trying to keep your work area dry, the snow and spindrift gets everywhere and you can't put anything down without it being covered in snow.

there were WSP's for some of the structural stuff but most of it was non critical, if you were talking pipe work or pressure vessels etc then I'm sure you would use ceramic heat mats or similar to prevent the job cooling too quickly.


I posted about it before I got posted out there
http://www.mig-welding.co.uk/forum/threads/any-one-experienced-in-real-cold-weather-welds.20895/

Awesome, what were you researching?

 

[ronan]

What about underwater welding, the weld pool constantly quenched. Anyone ever done it ?

 

[Wedg1e]

if you were talking pipe work or pressure vessels etc then I'm sure you would use ceramic heat mats or similar to prevent the job cooling too quickly.

Presumably, with careful design and prefabrication elsewhere, you could assemble pipework with bolted flanges.

 

[TechnicAl]

I was once consulted on a job welding rails inside a massive freezer. We used 309L and it worked.......simple

but I was surprised

 

[MattF]

Wouldn't the heat generated by the welding be hot and localised enough to prevent problems, in low temperature environments?

so I was letting my brain wonder today while doing tedious brain numbing work and had ended up at a point of curiosity...

You know you've really reached that point of no return when you start wondering if spiders poo. Seriously though, has anyone ever seen a spider turd?

 

[slim_boy_fat]

Seriously though, has anyone ever seen a spider turd?

I have.....

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

 

[Mr shiney]

What about underwater welding, the weld pool constantly quenched. Anyone ever done it ?

Yep. In my days as a commercial diver. Underwater welding is generally break fix stuff and actually easy enough to do it. Anything structural is done on the surface.

 

[TechnicAl]

What about underwater welding, the weld pool constantly quenched. Anyone ever done it ?

I did some trials. We made some rods and had them plastic coated.....fumes dont matter and we wanted to try them. The welding institute have a deep tank in middlesborough so off I went with these rods. I remember the diver welder was called Maltese Joe. He made some welds. I could see through a porthole at the bottom. I then met him at the surface and he handed me the welded pieces. My natural instinct took over and I wouldnt handle the just welded joints..........but they were cold

 

[BuiltnotBought]

urrrgh, sod welding underwater. that sounds like taking a wonderful job and just making it unnecessarily horrible... Though it is pretty impressive none the less.

Technical Al, did the plastic coated rods work??

 

[Tinbasherdan]

urrrgh, sod welding underwater. that sounds like taking a wonderful job and just making it unnecessarily horrible... Though it is pretty impressive none the less.

Technical Al, did the plastic coated rods work??

Ha.haha.hahahahahahahahahaha.ha.ha. What welding have you been doing that's a wonderful job!! And is there a job going there

 

[BuiltnotBought]

ha, I quite enjoy my sticking stuff together job. even if I do have to put up with the 'special' population known as operators and other useless slow types.

 

[Tinbasherdan]

ha, I quite enjoy my sticking stuff together job. even if I do have to put up with the 'special' population known as operators and other useless slow types.

You should try a council contract welding in Manchester , fireworks thrown at me, shot at with air guns and BB guns , dogs attacking you and kids in the van nicking stuff as soon as you open it!

 

[Tinbasherdan]

Council wouldn't listen to us. We reported a scrote for shooting at us, he was only about 12. Council knocked on, did you shoot at those workmen? No? Ok then, sorry to bother you

Then WE got the rollicking for making stuff up

 

[ronan]

You should try a council contract welding in Manchester , fireworks thrown at me, shot at with air guns and BB guns , dogs attacking you and kids in the van nicking stuff as soon as you open it!

I thought the uk police were much tougher with that sort of nonsense than that.

 

[davidjohnperry]

Spiders poohttps://uk.answers.yahoo.com/question/index?qid=20090412151659AAdltdl

Admitted I was bored then saw that question

 

[Tinbasherdan]

I thought the uk police were much tougher with that sort of nonsense than that.

Some estates , it's just better for them not to enter, and if you have a job to finish you don't want to be known as the ones that called the police, we had to work in groups after a chippy had a knife held to his throat and his van emptied on site while he was waiting outside a house for his mate to finish weighing up a job

 

[BuiltnotBought]

I think you should be allowed to just inflict some pain back at them. little ba***rds will learn the hard way that's for sure. big ones and all.

it's the biggest problem with are system. we are far to soft. Empty threats make people look like a joke and more and more people take the pi** because of it