Gentlemen and or Ladies,

I need clarification on T, Y, K connections please. Here is my Understanding. Please let me know if I'm missing something.

1. According to Annex K (D1.1 2010) definitions of tubular connection and tubular joint only one member has to be tubular for it to be considered a Tubular connection.

2. These apply to statically and cyclically loaded structures only.

3.If I want to qualify a procedure for T, Y, and K connections welded from one side without backing using GMAW-S and FCAW-G on box tubing I will need to follow figure 4.27 and 4.29

4. My welders will need to be qualified per 4.27 or 4.28 and 4.29 as well.

Please advise.

Thank you in advance,

Dave