- All compressed gas cylinders must be clearly marked by the manufacturer with the complete chemical name or trade name of the gas (or gases) in accordance with nationally recognized standards and university policy.
- All cylinders must be compliant with a legible hydrostatic test date.
- All compressed gas cylinders must be stored a minimum of 20 ft from highly combustible materials, such as oil.
- They must be stored in approved areas away from elevators, exit enclosures and stairs. These approved storage areas must ensure that cylinders are located and secured in a manner that will prevent unauthorized use/tampering to the cylinder and/or damage to any cylinder.
- All cylinders must be stored in an upright position and secured to a solid object at the upper 1/3 of the cylinder in a manner to prevent the cylinder from being knocked over or falling. Full size tanks must be secured either by using a wall mounted or bench mounted restraint or by being placed in a tank cage or cabinet. They must be held in place by attachment of both the chain and the straps provided. The maximum number of tanks restrained at one tank restraint location is a single tank. Restraining multiple tanks is prohibited. The small, portable, 14L lecture bottle tanks must be secured in a bench top stand.
- When the cylinder is not in use the cap must be installed. No tank may be stored with out a cap installed at any time.
- Tanks which are empty must be moved promptly to a secured location for return pick-up and not block the installation of fresh tanks when needed.
- Hydrogen tanks which have a concentration above 5% Hydrogen must be stored in a blue Hydrogen Storage Cabinet. These cabinets are vented to prevent combustion or explosion in the case of a leak. These cabinets are located adjacent to the area where these tanks are required. They can hold one tank in use (connected to the regulator and lines) and one diane hagner Page 1 11/4/2015 tank for storage (either an empty tank or a full tank in reserve). The tanks located in these cabinets must be restrained using the chains provided.
- All compressed gas cylinders must be transported with the cap in place – never move a tank with out its cap.
- All compressed gas cylinders must be moved using the gas tank cart and have the chain in place while the tank is on the cart. The EB Center tank cart is designed to hold a maximum of a single tank.
- All compressed gas cylinders should be inspected for leaks when each tank is first connected to the regulator and then again periodically during its use. Snoop (which is a commercial soap solution) is provided for this leak testing. A small amount of the Snoop is applied to the connections with the tank turned on – should bubbles be produced it is an indicator of the connection leaking. Turn the tank back off remove the regulator and attempt to reseat it again, turn the tank back on and re-test with Snoop. Should continued difficulties be encountered – seek assistance from the Center Lab Manager to resolve the problem. Teflon tape is available should the need for better seating of the regulator arise, but the minimum amount necessary should be used and Teflon tape must be wrapped on the regulator threads in the reverse direction of how the regulator nut is tightened.
- The valve at the top of the tank must be opened fully each time the tank is put into use – failure to do so may result in the tank appearing to go empty when it is in fact still full.
- Use only the provided open-end-adjustable wrenches to remove or to tighten the regulator nuts – never use pliers or other tools as these will damage the connections.
- Never use tools to loosen the tank valve stem as this will seriously damage the valve – only use hands for this process.
- Only the gas tanks providing carrier gas for GC or GCMS units are allowed to be have the tank left on when not it use to provide protection to the column from exposure to room air when not in use which would destroy the column – all other tanks must be turned off when the instrument is not in use.
- It is optimally preferred to order just the amount of gas cylinders needed for the task; however this is not practical in many cases since it will generally results in delays while waiting for delivery of replacement tanks. That being said, the end user for any gas tank must determine what amount of tanks they need and when they need replacements to be ordered. The suggested rule is to order new tanks when the current tank is about half used up. The exception for this would be any custom gas blends that can have a 6-8 week lag in delivery times.
- When ordering compressed gas cylinders, email the Center Lab Manager with the ordering information: Gas type (Nitrogen, Hydrogen, Helium etc), Grade of gas (UHP, Zero grade, standard), Number (how many tanks of this type and grade are needed), Instrument (CG, ICS, UPLC etc), Lab location (2nd floor, 1st floor, process lab, other rooms), Project (which project will determine where the source for the funds).
- The Gas tanks will be ordered when requested, and once they are delivered to the Biodesign Institute tanks will be delivered by the Loading Dock Staff to the lab area indicated when the tank was ordered. The Center Lab Manager will email the researcher to notify them of the tank delivery to the lab. It is recommended that the researcher confirm the location of the delivered tanks and to mark the tank tag with the instrument name for which the tank is intended.
- The supply of gas tanks on hand in the center is not to exceed the maximum allowable limit established by ASU EH&S and the Biodesign Institute EH&S.
Empty Tank Removal:
- Empty standard compressed gas tanks are to be removed as soon as possible from the area by the instrument. Ideally this will be immediately after changing the empty tank with a full tank – the empty should be returned.
- Tear the FULL Tag off and dispose of the tag end.
- Email the Center Lab Manager with the location, gas type and tank’s serial number so that the empty tanks may be promptly returned and continued charges not accumulate.
- The original cap for the tank must be installed on the tank prior to removal from the lab or the loading dock staff will not accept the tank for return of the tank and the gas vendor will not accept the tank. Empty small, portable,
- 14L lecture bottle tanks are to be tagged as hazardous waste. Once they have been properly tagged, place these tanks on the counter adjacent to the sink (door A207 from the Atrium). These tags are available from the Center Laboratory Manager. Notify the Center Laboratory Manager when these tanks are ready for removal by EH&S staff.
Gas Tank Training requirements:
- All members of the Environmental Biotechnology Center are required to attend the mandatory ASU EH&S Compressed Gas Training. This training session is offered annually, but each person is only required to attend this training once every four years. Records of attendance will be maintained by the Center Laboratory Manager.
ASU's Compressed Gases Safety Program detail may be found here.