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Interesting article in WNN DAILY, World Nuclear News, Feb.3, 2020. Welding, PWHT etc

In the March, 2019 AWS Welding Journal page 44 the following: 'Investigation of a Ruptured Socket Weld in Sour Service'. Very interesting. It looks like they welded a weld neck flange into a SW valve? The SW was a single pass?. 'Table 4'? I have some questions but thought I would just throw this...

The HTGR, (unit 1) at Peach Bottom Pa with its ornamental steel containment vessel was almost a vessel failure. The original design for the containment vessel was for a straight wall vessel up to the dome.If you can find some pictures of the completed vessel, you will see that it has many...

I was reviewing some of the older posts and came across one which asked the following question: 'uphill or downhill' which is better? The discussion was 'great' but the mechanicals do not lie. I have tested and trained welders with both techniques. Somewhere in the discussion one of the...

thread725-434617 Is it required to qualify separate WPS for repair welding as per AWS D1.1 ? thread725-434617 Ratheesh_N When I worked in the Middle East & China I ran into this 'Repair Welding Procedue' required scenario. After a lot of back and forth discussion I discovered that what the...

Years ago while working as a welding engineer for the biggest construction contractor, we ran into a problem with not having enough welders for the nuclear project. The union could not supply us so we brought in (non-union people, non welding people) and trained and tested them to weld only...

Does a single bevel groove with backing qualify a welder for single bevel open root, or no root and the back side is backgouged to sound metal and welded.

What tests are required to qualify a PQR for welding A706 Gr60 reinforcing bars to a P8 stainless steel plate to be used as an embed in concrete. All welding will be performed in the flat position.

Does a welding performance qualification test performed with ER 70S-3 on CS Group I qualify that welder to weld with ER 80S-Ni1 on CS (Group III).

I have a contractor that will be welding 0.50in. thick A572, Grade 60 plate that has to be welded to itself, to A36 and to UNS S3210 (unassigned)Duplex SS material.What precautions should they take when welding these materials. What welding rod should they use.It looks like 80ksi filler material...

A new QC engineer here has said that the fillet weld on top of a single bevel groove weld specified on the drawing is not necessary because it does not add or increase the strength of the weld joint. He said that the fillet weld is only for cosmetic purposes or to increase fatigue...

We have a contractor who is producing 1.625 in. to 1.875 in. thick steel plate for a very large pressure vessel, Height 215.4 ft. Diameter, 130 Ft. with elliptical heads. They are using magnetic lifting devices after the forming process to move & transport the plates. The Base Material is...

We are fitting & welding a large vessel. Plate thk. is 1.625 in.The weld joints are being fitted & temporary steel fit up attachments with a 'rat hole' or weld access hemi hole in the attachment are being welded to the two plates on each side of the weld joint to maintain the alignment. The...

Question: Is it permissable to construct/weld a very large pressure vessel with SA 738, Grade B material, which is a material that is not listed in Table NE-2121(a), there for not permitted, based upon an upcoming code case?

In what edition of ASME SEC.IX did the Welder Performance Qualification thickness of weld metal qualified in the coupon become 1/2in. & over qualifies for Max to be welded. I believe before it was 3/4in. Your input is always appreciated

I just returned to this business after being retired due to some 'cosmic perturbations'or other. If I recall correctly, An ASME PQR groove weld (SMAW), on plate or pipe any position will qualify that material & rod & other famiy related listed & approved materials & rods for welding ASME plate &...

We have to weld several 0.50 thk. CS weld joints that have double bevels and backing straps. These weld seams are 70 - 80 ft. in length. The contractor wants to use 3-4 welders per seam & divide up the weld length equally. They want to preset the weld seams about 10 mm and secure them with...

We have an AWS qualified CS(P1 to P1)WPS,without preheat. We have 40 to 50 mm CS base material that requires 10mm fillet welds on 2 sides. Required preheat for this thickness is per Table 3.2, 150F / 65C. Can I use the qualified AWS WPS (without preheat)to weld these fillets, preheating as...