Technical Ref: the red/see through fuel line...need to know

I did some insurance accident investigation a few years ago , fuel lines and proper clamping was on our test sheet to look at . Worm clamps are a no-no as well. Fuel lines are smooth.....

 

Jim, I'd like to know what the problem is with worm gear hose clamps. Not arguing, just asking. Is it a safety thing or a cosmetic thing?

 

It's a Chinese thing!

 

I have seen them loosen up.