As I understand the T, Y and K joints as per AWS D1.1 has to meet a certain criteria to be considered a T, Y or K joint. I am not that familiar with this type of joint. Does anyone know if there is an interpretation on this issue? We have a joint where a 14" pipe is welded to another 14" pipe and and forms an angle approximately 41 degrees. Thanks in advance
Not sure what you're asking. T-K-Y joints are just that. They have a shape of a T, Y, or K. Sounds like your situation is a Y joint. What is the welding requirement of the joint? There are prequalified PJP and CJP joints that have to meet specific criteria in order to be deemed prequalified. For example, an angle of less than 30 degrees is not prequalified.
It is an angle of less than 30 degree. There has been some discussion that the definition for this joint is that it has punching design criteria and that not just because we are using pipe for bracing should it be considered a T, Y or K joint. I guess that what I am being told is that just because it looks like a T, Y or K joint does not necessarily mean that it is per AWS D1.1? thanks again
I guess the question is, does a T, Y or K joint need to meet a certain design criteria to be considered a T, Y or K joint per AWS D1.1, or is any pipe to pipe bracing on structural considered a T, Y and K joint? Thanks
I don't know? Again there is a debate going on with eng. about this subject. The thought is that T, Y and K joints are where a branch member is welded to a main member and has punching load applications. This is why I decided to ask for help from all the good folks at this forum. Thanks
That is correct. T-K-Y connections are a generic term that describes tubular connections where branch members are welded to a main member, or chord, at a centering point. All three are subjected to punching loads, but each one reacts differently and has to meet different design criteria.
Thanks, our client just recently came back to us and pretty much said the same thing. No T, Y, or K joints existed on the project even though we had some pipe to pipe joints that resembled T, Y, and K Joints. Thanks again everyone