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Hi Johnplctech, IFRs has given you sound advice but there are a couple of more/other things to try. 1. Make sure you have a tight fit if you’re applying a fillet weld and the use the smallest gap you can stand if you are using a groove joint. 2. If you use a clamping system as IFRs suggested as...

Oops, I forgot to mention this in my previous reply as a possibility. Your description of "black" specks could be construed as a chrome oxide that exhibits itself on the puddle surface in the P4x's when using too high of heat input. I've observed & experienced this phenomenon and...

Try using a different heat number of filler and if that doesn't change the condition, change the heat number of the pipe. Seldom "There's no such thing as a welding problem, just welding puzzles of assorted sizes!"

For what you're asking (reading & comprehending radiographic reports), I'd suggest taking a look at ASME Sec.V Seldom "There's no such thing as a welding problem, just welding puzzles of assorted sizes!"

I'd suggest using the same joint & weld symbol you used for the rest of the joint (possibily square butt). Those thin edges will quickly burn off and not effect partial or full penetration even using GMAW-SC. Seldom "There's no such thing as a welding problem, just welding puzzles of...

Hi Abbver98, I highly recommend using the Gap-Alets that Tecnico1948 suggests. I originally introduced them at my plant site in 1988 and now my former (I'm retired) chemical company (second largest in the world) has included them without substitution in all of their global pipe specs for many...

All of the answers are to a degree correct but I suggest thinking about the impact that a leak would have on the square inches of the annular space if the pressure were contained by not having a weep hole! If your service ran at 100, 200, 300, etc. psi, would it be considered good engineering...

Hi Korobi, I would second Welding1’s suggestion that you visit the particular web site he mentioned. In addition, I’d suggest paying close attention to what is stated concerning carbide precipitation and interpass temperature. It’s been my experience that even using low carbon filler & base...

Hi moseley, Nope, you're ok! As so often happens with anybody that posts a question, we sometimes forget to include all the info that's needed for a specific reply or maybe we don't even want a specific answer. Post'ers know what they are asking but the Reply'er sometimes has to make...

Hi mpg, Hey, don't feel bad about not knowing about them. Heck, I had a whole company of engineers that took about nine years before they would look at a WFI catalog! ;-) Seldom "There's no such thing as a welding problem, there are only welding puzzles of assorted sizes!"

Hi moseley, I understand what you're saying and I might be a little rusty on Sec IX but am I not correct in the answer to his question? He didn't ask how to test his welders, he asked- "to qualify a welder for 1" thru 8" diameter pipe with W.T. ranges of 0.188" to...

Hi Rick44028, If you're using ASME Sec IX, make sure your test coupons are equal to or larger then 1" NPS and the wall thickness is at least .250" Seldom "There's no such thing as a welding problem, there are only welding puzzles of assorted sizes!"

Hi mpg, WFI has the sch10/sch10 fittings and I think they're called Pipets. Once you have one in-hand, you'll notice that the amount of attachment weld is very similar to that of welding on an equivalent #3000 coupling. Seldom "There's no such thing as a welding problem, there are only...

Hi gozzi, Lord I hated to weld in our old Evaporator buildings! Gloves, clothing, and tools became soaked with brine and everything you touched was slimy. The very worst aspect was you were continually getting shocks when you were welding! Jeez, I hated that! Concerning the weld related...

Hi gozzi, There are a few questions I need to ask here. By splitting, do you mean a crack-like indication that develops and propagates to joint failure? Or are you seeing a severe corrosive degradation more or less in the center to the weld and traveling the length of the joint? Also you...

In response to mgp's post on 5/9, specificly his #4 comment. The manufacturers have fittings designed specificly for thinwall SS applications and here's a little insight as to saome of my experiences concerning their use or lack of: I'm retired from one of the very largest chemical companys in...

Hi Ajayputta, The previous two "Replyers" are correct in all their suggestions but I'd like to extend a couple of those suggestions. A couple of the most often found conditions I've observed that have promoted porosity in in mig welds are as follow- 1. You mentioned 35 deg C as an...

Oops, I forgot to mention in the previous post (clicking too quick) an additional reason to use MT or PT. Please take a look at the acceptance criteria table 341.3.2 and check out the fillet weld imperfections listed. Notice which ones are NA's and which ones are detectable using MT or PT.

Hi AEF, I’ve been in your situation several times with socket closure welds and have taken this stance: I performed the in-process examination and used MT on each layer of weld metal inleu of using either UT or RT. As you’ve discovered the limitations of UT and RT pertaining to socket welds...

Hi apiguy, Without trying to be presumptuous of MURZ’s reply, possibly I can help you understand the practical application of his second paragraph regarding nitrogen exposure to the arc in relation to exposure to the root’s backside from my experiences. The normal joint design (1/8+” min root...