DIN 11851 couplings allowed in B31.3?

[ore12]

This coupling is widely used in Europe, and I'm wondering if this is allowed in a B31.3 process skid?

DIN 11851 coupling (iso 1127)

The reason I ask is because we have very good experience with these and there are nice Threaded male-part adapters available for them (which I can't seem to find for Tri-clamp).

 

[XL83NL]

This would probably fall under para 304.7.2, as the fittings themselvew are a listed component standard, and the material probably isnt listed in table A-1 (Im wording on a DIN 11850 piping system currently too and noticed the same). I think the fitting materials are per EN 10088-1 1.4404.