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Hi TFB
its optimistic to thing that innershield (DC-) will penetrate to pick up the root
Generally the depth of pen is verified by UT if it is Partial Pen to make sure you have the required throatYou could go to full pen to make sure, but it depends how many meters you have to do using this configuration, if it was 1m no worries, if it is 100m I would not be so keen
R
FlashSorry about the emails BB, technical error, I should stick to welding, I have a new machine and forgot to setup the welding flash admin account on it
thanks for pointing it out
R
FlashHey TFB
firstly make sure you know what standard you are working to 1101.3 or ISO2553 as there are differences
but from your description it sounds like 1101.3
maybe post an image of the weld symbol and confirm what standard you are working to
R
FlashGreat News Lou
congratulations to you and the lads
consider this a start if I was you I would
try and get some more certificates 3E, 4, 8G/F
and also keep ramping it up with the TIG,
keep trying to turn it up with the amps,
keep trying other things like,
put the pipe into a restricted position like 6GR or put it close to a wall, if you practice these things when you come back to doing workshop butts it will be so much easier
try to only weld with gaunlet gloves not TIG gloves, it will be hard at first but when you get used to it you will love it
as I said previously I never use TIG gloves for welding pipe, I will use them on my wire hand if I am using 1mm filler wireKeep in touch
R
FlashHi Kav
diameter qualified is only for Welder Quals
WPS are not diameter dependent as far as I am aware3.91 is fine for mechanicals, I have done it heaps of times (not on 20NB) always minimum 50NB
I would do it on 5.9mm WT pipe, something like 100NB Std (internally ground to 5.9mm) 80NB Std or 50XS if it was me
as thickness range 6mm and below is .5T to 2T
It depends on the number of tests you require but you might get away with two of each
Good luck, let us know how ya go
Hi Conor
The question how do I write a WPS is like a welder asking how do I design a steel structure, there is a great deal of knowledge that goes into it, it is great that you are interested
these are broad statements so please treat them that way
1. If you have qualified experienced welders, do not tell them what to do when trying to qualify a WPS, with Gr250, 300, 350 just record what they do and apply the essential variables out of the relevant standard, if you try and get them to conform to what you want, they will do it for the test and then go back to doing what they were doing anyway, you are better of proving what they are doing works, unless you have a good reason/justification to get them to change (if the material/service conditions warrants tight controls this is different ie DSS or SDSS)
2.electrodes to specify from the engineers point of view should just list Min TS or YS if we are talking about Gr250,300, 350 (maybe you could state maximum hydrogen level for critical applications or thick sections but not normally)
3. preheat can be calculated using AS1554.1, but keep in mind this does not consider highly restrained jointsMy tip to you would be pick a good friendly welder or two and talk to them and exchange knowledge, most welders like to know a bit about engineering/design ‘stuff’ just like you would like to know more about welding
Good luck
R
FlashUnfortunately the competition is not welcome
I think it is the best thing that has happened to the industry in a long time
the support we have received has been over whelming
The AWI is intent on listen to its members and following their requests
They will not be bullied into doing something that is not in the best interests of the members
The members of the AWI can assist be encouraging other to join and assist grow the organisationR
FlashHi Kav
it was due end of last month
the hold up is that the NZ parliament needs to approve the document before its release
I am unsure if they will call it 2011, they shouldsurely it can not be too far away
R
FlashThis is an interesting question that I have come across before
the standard stated if impacts are required a change in position constitutes an essential variable
therefore theoretically a change from 6G is a change in fundamental position
but in a practical stand point, an increase in heat input is the issue, not because of the heat but in my opinion because higher heat input typically means slower travel speed and therefore larger runs, which typically means lower impactsFYI you can not take impacts from macro sample, I think you are getting mixed up with hardness testing
Talk soon Guys
FlashBD
if the job does not require impact testing – preheat is not an essential variable
if it does require impacts then you can increase the preheat by up to 56C without requalR
FlashBrogden
you are right when you say “most organisations require a weld test”, but does this make an AS1796 certificate worthless, No
it gives you the opportunity to increase your knowledge and skills
AS1796 requires that you work to a relatively strict criteria, something that welders need to learn to do
It also requires you to complete a post trade theory componentmost employers would “typically” give someone with a certificate a start before someone without
My opinion is it is well worth itPS, what are you doing the root on the pipe with
R
Flashto be perfectly honest instead of testing the welding procedure you end up doing a random batch test on the flange material, if it does fail in my opinion it is because the quality of the forging is suspect
because the flange values will vary depending on when and where they are made
I have seen some good some not so good
Let us know how ya goR
FlashCheck this out Kav
this is not the only one I have done and most have similar results
R
F
impact example.pdf
