Just because it has been eliminated from the code doesn't mean the short comings of the process have been eliminated. GMAW-S has a well earned history of having issues with fusion type defects.
We had a project inside the biological shield in a nuclear powerhouse years ago. Due to concerns...
AWS D1.6 includes a matrix of Austenitic stainless steels and recommended filler metals. You can also use the WRC diagram as modified by Dr. Kotecki and Dr. Liphold (sorry if the spelling is incorrect) that can also be found in AWS D1.6, You can calculate the chrome and nickel equivalents to see...
A double sided groove weld made without back gouging or a single sided groove weld made without backing without qualification by testing to be considered to be a partial joint penetration groove weld. Reference: AWS D1.1/D1.1M:2020 clause 5.4.2.1.
The work around is to qualify the WPS for...
AWS D1.1/D1.1M:2020 allows the designer to use of filler metal that under matches the base metal, but the provision is limited to 10 ksi below the minimum specified tensile strength of the base metal and the use of under matching filler metal is limited to specific weld types. See Table 4.3...
It depends on what your governing standard is. As indicated by the welding symbol you included in your post, the 1/4-inch dimension is the depth of the bevel. For the bevel, the depth would be measured through the thickness of the part being beveled. If AWS D1.1 is the governing standard, the...
You didn't mention the governing standard, but all the fabrication standards I've worked with require CJP welds to be made with backing, double sided groove welds that have been back gouged and back welded, or the WPS for CJP without either backing or back gouging must be qualified by testing...
I'm not saying this is a good detail for the application. The question was asked what the sketch meant. If the nozzle and vessel is large enough to have access to both sides of the joint, it isn't impossible. We don't have all the information to make that call.
Double sided groove welds made without back gouging are considered to be partial joint penetration groove welds unless the WPS was qualified without back gouging.
From the sketch, it appears the bevel groove on the bottom side is welded first and then back gouged from the top side. Then the...
If the governing document is AWS D1.1/D1.1M, it is permitted to weld weathering steels with single pass fillet welds or groove weld (per side) provided the size of the weld is limited. The thought is that there will be sufficient alloy "pick-up" via dilution to maintain the weathering...
Welder performance qualification is a separate function from qualifying a welding procedure specification. If you are working to ASME Section IX, the mechanics of qualifying a WPS is addressed in Article II. The mechanics of qualifying a welder is addressed by Article III. Article IV provides...
Can you provide a sketch of the joint used to qualify the WPS you already have? I can't picture exactly what you did from the description you provided. As recorded by the PQR, is the P-1 material welded to the P-10H material using Inconel 625 filler metal?
Preheat is the temperature the base metal is heated to before welding can commence. The maximum interpass temperature of the base metal adjacent to the point of weld initiation that welding can continue. If the maximum interpass temperature is higher than that listed by the WPS, welding must be...
It's the old, "What comes first, the chicken or the egg?"
Always have the welding of the test coupon witnessed by someone that understands welding and what is being accomplished. They should be independently verifying what is being done is in accordance with the preliminary WPS. The should also...
The residual stress in the longitudinal direction will be about the same as the yield strength of the weld/base metal.
Is this added detail being added to an existing structure or is this a "new" fabrication?
Question: How can the added member, the 20 mm plate, be subject to fatigue, but not...
The following is taken from AWS D1.1:2020 Structural Welding Code/Steel
"6.16.3 Welder and Welding Operator Qualification Through WPS Qualification: A welder or welding operator may also be qualified by welding a satisfactory WPS qualification test plate, pipe, or tubing that meets the...
