Larryzv7 wrote:
Old Biscuit, thanks for the info and the drawing. Now I am also told that propane tanks have an expiration date stamped on them. Further low temperature outdoors can diminish the efficiency of a propane system. Anytime a propane tanks’ pressure exceeds 350PSI the pressure relief will begin releasing propane vapor. So smelling propane may not necessarily mean that you have a leak. Can anyone verify these statements to be true or false? Thanks!!!!
Propane 'cylinders' (portable type 4-40#) have a re-certification requirement. 12 yrs. after mfg. date stamped on collar they must be 'visually inspected' (good for another 5 yrs) or 'tested' (good for another 7 yrs). New date sticker applied. This is a DOT requirement
(Propane TANKS ----MHs-----do not have this re-certification requirement. They are an ASME/NFPA jurisdiction vessel)
Yes relief valve will open at 350# and spew vapor. If vertical cylinder is laid on it's side relief valve is now in liquid and if it should open liquid propane would be spewed. Liquid propane will burn you on contact.
Propane liquid boils (turns to vapor) at -44*F so you have to have extreme cold temps to really affect propane
Low temps can cause issues with flow thru regulator and cause 'icing' at regulator. Simple insulation of regulator will take care of that-----but if icing occurs you should have cylinder 'purged' to remove any entrained moisture/air OR butane mixture.
