KInd of hard to imagine ever turning sharp enough to damage your LP bottles. If you DID turn that sharp it would likely break the threaded post to which they attach before the bottles themself would be damaged. If you CAN jackknife that sharp I'd look at your set up because it shouldn't be possible.
2011 F-150 HD Ecoboost 3.5 V6. 2550 payload, 17,100 GCVWR - 2004 F-150 HD (Traded after 80,000 towing miles) 2007 Rockwood 8314SS 34' travel trailer
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