I know this is an old thread, but I want to add a very important point that has been left out of this conversation. Probably the biggest advantage to using threaded sanitary fittings like DIN/SMS is that the potential for a hose or fitting to "pop" off under pressure is nearly zero. When these fittings are even loosely hand tightened, they do not leak. Even without a gasket in between the fitting, they barely leak. That's why most racking arm ports are made with DIN fittings: so you can loosen the thing without the potential for it to blow off.
Having just finished a major expansion here, getting much larger tanks, hoses and other equipment, I made the transition so that everything is now DIN fittings. I love them. Yes, the stuff is expensive, but I rest easy that my crew is much safer with these new fittings. Also with two inch hose, TC can be a real challenge to line up, not so with DIN.
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