Thanks Richard for your kind reply. The first they tried was 2.5 stick welded, burn trough and pretty bad. When they cleaned the welds there were exactly the dame cracks as now, after tig. The gaps in both case were from 0 to 1mm at mitre joints (corners) and some 3-4mm between two long pieces.Right.
You can't expect anything good to come out of this if your giving people or yourself (it doesn't matter) a 4mm gap to bridge. ...Get parts fitting properly and tight. The standard of welding will go up trust me.
My 1st question is, what would cause those cracks?
And why the tig welds are so smocky? All I have ever seen when done tidy and clean, there was no smoke at all. Thanks for help. Just try to figure out.
Not always, mate! They often have a package and some of the minor bits of this package may be the welding. The actual subbie was fitting the glass panels and finishing it with ss Q caping. All the guys had to do is to fit a U shaped handrail over the compression gasket. Then a welder comes to joint the bits.Regarding the right subbies to get on the job, in the big companies there is a very long procedure to get on the subcontractor's list, with all the approvals, references and so on. Then there are contractual arrangements that you just cannot swap a subbie at will but need some serious ongoing issues.
In my experience, this is very true. But usually those subcontractors on the approved list are skilled in what they do.
The welder they had was stick welding mild steel handrails in the staircases and doing this all his career. Then grinding down (very roughly) and giving the handrail to the painters, red oxyded then painted with hammerite. Then another guy with thermoformed plastic capping.
I guess the actual work will have to be skipped again.
Cheers for your replies guys.