I would appreciate any help in determining what the thickness definition of AWS D1.1 is regarding preheating. If I may further explain: A customer is stating that they want 1 1/2" thicknesses preheated to 150 F which was not included in previous pricing for fabrication. The push-back from our...
I found through a search where #31 was addressed and the summary was that any CJP groove qualifies for any other groove with details meeting 3.12 and 3.13. But then there was no addressing of #32 which seems contradictory to #31. My question is then if a prepared CJP groove is qualified per...
We have B-L1a-F joints on a 304L hopper. There is a concern that the root openings may be excessive. I am trying to understand the fit-up tolerances in figure 3.5 of D1.6 (2007).
1/4" plate should have 1/4" root opening if detailed as such, plus 1/16" based on the equation? I question it...
Could someone point out where in D1.1 or D1.6 that it says you shall use the documents provided in the appendix of D1.1? I would also be curious of required statements or signatures such as "We certify that . . . in accordance with AWS D1.X". I am only aware of necessary requirements that AWS...
I have specifications that require welder testing to ASME sect.IX and welding by API 650. On this job, a 1/16" root opening for a fillet weld is called out but our trial fit is showing an average of 3/16" root opening. Not being as familiar with API 650 as AWS D1.6, I am questioning where...
I debated on what forum to use for this so I hope I have chosen correctly. We have had success with overlaying T200x on A36 but have a scrubber job calling out 2205 whereas the customer wants the T200x overlay performed. In talking with the TX distributor of the overlay material, we were...
We have recently attempted to use metal core in place of the 71T-1 because of the deposition and efficiency differences. However, we encountered porosity, incomplete fusion, and crack issues. I would like to know if others have had success or failures with this wire and process.
We closely...
I have reviewed the results of a search on this topic, but really did not see this situation addressed. Does the symbol imply that the top side of the top flange of "B" also gets welded to the right flange of "A"? In my opinion, it should not get because it is not a fillet weld.
I have noticed that most all backing rings are made of A-109. I also noticed that this material is not listed in section 3 of D1.1 yet it seems to be very common.
Am I missing something or is this a case where procedure testing per section 4 will need to be applied for welding pipe with the ring?
We have 1/4" plate lapped onto a C15 and the detail drawings have a typical fillet weld symbol with a 1/4" size. D1.1 calls for a maximum fillet size of 3/16" for a 1/4" plate thickness. However, it also says that if the weld size is detailed as throat thickness equal to the 1/4" plate...
All,
Please advise if I am interpreting 3.6 in 2007 D1.6 correctly. It is saying that a SAW weld can be prequalified if a manufacturer has its flux paired with an electrode as long as I perform the 3 steps listed? If the manufacturer does not pair a flux with an electrode then I need to...
Does anyone have any data regarding the relationship between man hours and inspectors?
It would be very helpful for our expected "ramp up" to know how many more inspectors may be necessary.
We are fabricating to D1.1 but this may also fall under AISC as well.
I have not found in either where there is a specification stating that plate splices must be staggered. In other words, you must avoid forming a "cross-hair" with splices.
Can anyone substantiate my findings, or lack thereof...
I am completely ignorant to blasting and paint profiles, by my choice I might add. Now, however, it has become part of my job to see that our coatings are correct.
I need information on the following:
If I read a blast profile of 3.7, does that not mean that we would need DFT paint mils of...
I would like some other interpretations for Table 6.1 (8) if anyone has time. Does the "sum of piping porosity" mean the adding of each individual pin-hole or the length of the worm-hole or a combination? It would seem strange to accept a worm-hole spot that is at least 1/32 round and travels...
I have read through D1.6(2007) to see what welding 316L(A312) to a D1.1 Grp I or II material covers. We have a procedure for 316L to A36 but have a job coming up that requires 316L to A572 gr.50. I know that, with the engineers permission, you can test welders on Grp I and II material with the...
We have drawings requiring a 71 deg bevel on 1" plate. Basically, it is a slope where 1/2" and the 1" will meet. Does anyone have a good idea how to accomplish this 2 3/8" wide bevel without distorting the material with excessive heat? To make matters really intersting, the material has a 27'...
The topic of having a Level III on retainer has come up with my company. They are under the impression that you must have a Level III on retainer in order to run your quality program. Our work is 99% AWS D1.1 and I have not heard of such nor read anywhere that this is a necessity. I would...
Our customer has requested ERNiCrMo-10 instead of the recommended ERNiCrMo-4 for the C276 joints. The service duty of this equipment is basically a door frame for a corrosive environment. Is the -4 not more resistant than the -10 because of a higher Ni content?
I will be doing a time study of full-pen welds with backgouging vs. full-pen welds using ceramic tape. We will run the typical 60 degree groove for backgouging but was hoping to cut down on the volume by moving to a 45 degree for the tape since the root opening is wider. Anyone have experience...
