Posted: Tue Apr 20, 2010 7:29 am Post subject: Re: Transporting Oxy and Acetylene tanks. The official answer is to ALWAYS have your acetylene tank standing up, whether in use or in transport or in storage. Many people do transport acetylene on it's side, but if you choose to do this, let it stand up for at least a couple of hours before you draw from it. Also you'd better be darn sure the tank valve doesn't leak.