vent size recomendation

Thanks For Your Reply Spud I Enjoy Reading The Do's And Don't That You Post, Make's Sense To Me. And To Whom Ever May Ask, You Are Correct There Are No Stupid Questions, Only Stupid Answers. There Are Some Really Good People On Here That Will Help You With Just About Anything That Is Asked, And Some Who Just Give You Grief Because You Don't Know And Ask, Dont Worry About The Few,ask Your Questions Someone Will Help You. Jamie

 

This was caused by a flash explosion of the vapor in the tank when blown burst panel ignited them. Tanks need a vent hose away from this area. I think this subject was discussed here before.