J-Groove Or Fillet Weld Type
J-Groove Or Fillet Weld Type
(OP)
The application consists of capping both ends of a pipe with plates, by means of preparing the edges. The welding will be done by the outside circumferential joints. The drawing indicates a J-groove weld type which requires more work. Can a beveled fillet weld instead of a J-groove weld be performed on these joints? If not, what is the rule of thumb for weld size for J-groove welds?
Any response will be greatly appreciated!
Any response will be greatly appreciated!





RE: J-Groove Or Fillet Weld Type
So, change the drawing. (That is, justify to your boss and the person who has to change the drawing, and that person's boss that his/her time spent changing the drawing is less expensive than the time to make a J-shape at the end of the pipe by the workers.)
But, until the drawing is changed to a bevel prep by a cognizant engineer by a formal change process, you have no choice but to follow the drawing.
RE: J-Groove Or Fillet Weld Type
RE: J-Groove Or Fillet Weld Type
Regards,
Mike
RE: J-Groove Or Fillet Weld Type
RE: J-Groove Or Fillet Weld Type
2 - vanci is pretty much right, except than ANY full-penn weld will fuful the design requirements.
3 - SnTMan has hit the *essential* point. Getting a Change Order run through for Nuke work takes months, if they like you and if they consider your proposed change worthwhile. Thus, the odds of getting a Change Order before Halloween are somewhat between slim, and none [and Slim has left town].
Just build it like it was drawn, and be a little more detail-oriented the next time you bid on Nuke work. Nuke stuff has to be essentially perfect, for them to consider that work as 'marginally acceptable'. Not kidding on this one. I strated out building nuke plants in the USA in 1981. We scrapped a BUNCH of 'good' work, and had it remade until it was essentially perfect. Those aren't really nuke plants you are looking at, those are the world's biggest Swiss watches.
RE: J-Groove Or Fillet Weld Type
RE: J-Groove Or Fillet Weld Type
A small-to-zero root protrusion "root reinforcement", and a small cap protrusion "cap reinforcement".
RE: J-Groove Or Fillet Weld Type
RE: J-Groove Or Fillet Weld Type
• Nominal pipe 8, OD 8.62 x .32 wall
• Nominal pipe 14, OD 14 x .59 wall
• Nominal pipe 16, OD 16 x .66 wall
RE: J-Groove Or Fillet Weld Type
RE: J-Groove Or Fillet Weld Type
RE: J-Groove Or Fillet Weld Type
The requirements for the final "shape" of the J-prepped weld have been presented above: The "groove" must be fully filled up ABOVE the surface of the original pipe wall. The final weld contour must be "positive" (higher than the original OD of the pipe), with a nominal maximum height limited by YOUR COMPANY's weld procedure. Usually, this maximum reinforcement height is 1/8 inch, but you have not presented your company's WPS for review to confirm this.
By the way, expect the power plant's nuclear weld inspectors to require a copy of this WPS procedure, your welder's qualifications, your welder training requirements and re-cert papers, the weld material and weld filler cert's, and your company's QA inspections of the intermediate pass and final weld NDE inspections.
As stated above, if you want to want to change the weld design to something else for this nuclear application, change the drawing. If you don't want to pay for changing the drawing, follow the drawing - and be able to prove to the power plant that you followed all parts of the drawing.
True, true. It is not a pressure boundary of a piece of radiactive-containing high-pressure pipe in a safety system. I don't care, the plant will not care. it is being installed under their approval inside their plant in accordance with their approved drawing.
You are apparently providing a support inside a nuclear plant (which will be stressed under earthquake or accident conditions and under operational cycles and pressures and strains); and we who will be working underneath your support and who will be providing equipment and piping and machinery installed underneath your support really, really, really really want your support to be built in accordance with the plans you were provided.
RE: J-Groove Or Fillet Weld Type
RE: J-Groove Or Fillet Weld Type
RE: J-Groove Or Fillet Weld Type
RE: J-Groove Or Fillet Weld Type
RE: J-Groove Or Fillet Weld Type
RE: J-Groove Or Fillet Weld Type
Regards,
RE: J-Groove Or Fillet Weld Type
RE: J-Groove Or Fillet Weld Type
RE: J-Groove Or Fillet Weld Type