I would ask the designer for clarification.
Assuming you are working to the requirements of D1.1, a standard flare bevel has a maximum weld size based on the radius of the rounded edge. However, the designer may be looking for something more substantial, i.e., a CJP groove made with backing. Tubular connections can be very dicey. For instance, if the tubular connection is welded as a CJP, there can be no starts and stops right where the welder is most likely to initiate and terminate the welds, at the corners.
The designer should be very clear on the design requirements. If there are any questions, ask, better yet, insist on complete information. Make the designer earn his money just as you do. There is nothing better than a sketch of the weld cross section when there is any doubt about what is expected.
Best regards - Al