By -
Date 07-24-2003 04:51
Mr. Campbell,
D1.1 Annex B has a definition of dihedral angle. It is based on a plane perpendicular to the local weld axis at the OD at the point of measurement. It can be applied to plate as well as tubulars.
I believe that you are misinterpreting paragraph 4.26.1. If you look closely at Table 4.10, the Note 7 that gets you to para 4.26.1 is referred to at all of the possible qualifation types where a dihedral angle of less than 30 degrees is possible (plate fillets, plated CJPs, tubular CJPs, etc). Paragraph 4.26.1 is therefore written in a sort of generic manner. In your situation the applicable part of 4.26.1 is the reference to 4.12.4.2 (also written somewhat generically). This gets you to the heart of the matter, i.e. the acute angle heel test shown in Figure 4.26. To sum up, you do not need a 6GR test for fillet welds joining plate to tubulars, but you do need an acute angle heel test for local dihedral angles of less than 30 degrees.
Mankenberg