What is an ASME propane tank?
There are two common types of propane tanks: American Society of Mechanical Engineers (ASME) tanks are a common type used to supply fuel to the home. These tanks are typically installed horizontally and range in size from 120 to more than 1,000 gallons.
What is the normal relief valve set pressure of a propane tank?
375 psi
Cylinder relief valves are set at 2585 kPa (375 psi). The function of a safety relief valve is to keep a propane tank from rupturing in the unlikely event of excessive internal pressure buildup. Propane tank relief valves are also known as pop off valves, or pressure venting valves.
How can I tell if my propane tank is ASME?
You can identify an ASME tank by the data plate located under its dome. An ASME tank will have a “clover leaf” marking on the nameplate. DOT cylinders that provide fuel for homes are called stationary service cylinders.
What kind of valve is on a propane tank?
OPD valves
Propane tanks made today will have OPD valves. Most people will have grill tanks that use OPD valves. Tanks won’t get refilled without them. If you happen to have older propane valves, you can get adapters to make the older tanks work with more modern appliances.
How often do ASME propane tanks need recertification?
Propane cylinders must be requalified or replaced every 5 or10 years depending on the cylinder type, condition, and previous requalification method. (Ref. 49 CFR § 180.205(d) and 180.209(e).)
What is the relief valve on a propane tank for?
All propane tanks, including the cylinders you use for your grill, are required by law to have pressure relief devices that allow for the release of excess pressure inside the tank. The safety relief valve is designed to protect your propane tank from rupturing in case excess pressure builds up in the tank.
Where is the relief valve on a propane tank?
Internal relief valves are generally placed near the end of the propane tank on above ground containers.
Do ASME tanks need recertification?
American Society of Mechanical Engineers (ASME) propane tanks in Motor homes are heavier and are permanently mounted. They do not need this recertification, but should be visually inspected regularly.
What is the difference between an OPD and a pol valve?
Yes, you can still use POL (left hand thread) fittings. The OPD valve has inside POL threads, as well as, the outside threads for the new ACME connections. Also, the valve has a push valve which will not allow any propane out unless a connection is made.
What size is the valve on a propane tank?
LP OPD Valve for Propane Cylinder Tank. This 20 lb. LP OPD valve has a 4.0 Dip Tube and fits most typical 20# propane tanks, most typically used for barbequing.
Which PSI listed on the ASME data plate can be filled?
If the data plate is missing or illegible or shows a working pressure other than 250 or 312 psi, the tank must not be filled. A fixed maximum liquid level gauge is installed in the ASME tank at the maxi- mum liquid filling line.