Rocky3640:
It never ceases to amaze me how little important engineering and design info. you people seem to think you should provide, if you want a meaningful discussion and solution to your problem. These details are important for a good, economical and practical solution. What are the lengths of the two pieces and their weights? What’s the joint btwn. the two halves, bolted flanges or a field welded joint? What crane cap’ys.,etc., etc. Some sketches of the pieces and the lay-of-the-land would be helpful in understanding your problem. What do you think the lifting trunnions and tailing lugs should look like, start your design and show it here, so we have something to discuss and critique.
When you do something like you are proposing, you probably have to brace the two pieces for manufacturing, handling and transport, in any case. So design this bracing in (or on) the ends of the two halves to serve both functions. On the bottom half, this bracing will have to react the trunnion loads from the entire weight of the piece, in the final analysis, and the uprighting loads during that process. On the upper half the tailing lugs are needed during the uprighting, but then they could be removed prior to the final lift and placement of the upper half. Thus, the top trunnions and tailing lugs might actually be built into your bracing frames. And, these bracing frames could bear on the inside (the i.d.) of the vessel and be bolted to the flanges, if there are flanges. This bolting might not be enough for the top lifting trunnions, but might be sufficient for the tailing lug loading.
