Firestopping cast iron pipe with a no hub coupling

Hello,

I was wondering about firestopping metallic pipes with a coupling penetrating a barrier (in general, for both concrete floors and gypsum walls). I haven’t been able to filter for this specific condition. However, several systems, such as W-L-1412 and W-L-1410, clearly depict a pipe with a coupling in the drawings, even though they do not mention any specifics in the text. Based on this, I have a few questions:

1. Could any cast-iron/steel system (even if it doesn't mention a coupling anywhere) be used for a pipe with a coupling if every other condition of the system is satisfied?
2. If not, is there a list of systems that allow metallic pipes with a coupling to be the penetrant?
3. UL Guide allows a metallic pipe to pass through an opening at any angle. Does this apply to a system for metallic pipe with a coupling (such as W-L-1410)? For example, if the pipe is at a 45-degree angle, and the coupling also partially protrudes at a 45-degree angle, would that be permissible?