Gas Services

Gas Services manages campus gas supply and distribution.

ASU Gas Services sells and distributes compressed gases, liquid nitrogen and dry ice to ASU’s research, scientific and academic communities. Gas Services also rents Dewars and cylinders to transport and store compressed gases and liquid nitrogen. Gas cylinders are available for delivery to all ASU campuses, and dry ice and liquid nitrogen are available for self-service pickup on the Tempe campus. 

Visit the Gas Services information webpage for additional details.

Refer to ASU policy PUR 223: Gas Cylinder and Gas Products for more information. 

All individuals handling gas products must complete the Compressed Gas Safety Training course.

All gas and parts orders must be placed directly through Workday.

Ordering inventoried gases

To order inventoried gases, create a chemical requisition in Workday. From there, click Search Catalog, type the name of the gas you want to order, and select it from the list. Please choose ASU Materials Management as the supplier.

Ordering parts, refills and regulators

A limited selection of regulators is available through Workday. To order a regulator, create a Goods and Services Requisition, click Search Catalog and search regulator to view available options. Only choose ASU Materials Management as the supplier — do not choose Linde.

The requesting department is responsible for the monthly rental fee until the equipment is officially returned and recorded as such. The department will be charged the full replacement cost if a cylinder or dewar is lost or stolen. Departments must also email ASU Gas Services whenever a cylinder or dewar is transferred to another user or when there are changes to the lab or account number.

To order a liquid nitrogen dewar refill, create a chemical requisition in Workday, click Search Catalog, and enter LN2 Dewar Fill. Refills are completed within two business days from receipt of the fully approved order.

LN2 dewar refills require a $55 upfront charge on the requisition for pickup, filling and redelivery of the dewar. Depending on its temperature and other external environmental factors, the quantity required to fill will vary. This will be billed at the beginning of each month for the previous month’s use.

Returning cylinders

For cylinders delivered to a cage, please complete a cylinder return request and place empty cylinders back into the cage once they are ready for return. Remove the entire empty portion of the tag on the empty cylinder before placing it inside. Cages are checked weekly, and the return request will notify Gas Services, who will collect the returned cylinders during those inspections.

The Department of Transportation requires that all cylinders have an appropriately sized cap for transportation. Contact Gas Services if you need to purchase a replacement cap.

If your cylinders are delivered directly to your lab instead of a cage, email Gas Services to request a pickup. Pickups are typically completed within two to three business days.

Delivery schedule

Approved orders for inventoried cylinders are delivered according to the following schedule:

• Tempe campus: within four business days
• Downtown Phoenix campus: Mondays
• West Valley campus: Wednesdays
• Polytechnic campus: Fridays

When a cylinder is delivered to a cage, an email notification will be sent to the requester confirming delivery. Storage is prohibited at any cylinder cage; all cylinders must be removed within three business days.

Verify your delivery address when placing an order in Workday. Cylinders that must be redelivered due to an incorrect recipient address will incur a $75 redelivery fee.

Liquid nitrogen is available to authorized ASU researchers, professors and students. ASU Gas Services provides LN2 through an automated dispensary system on the east side of the Bateman Physical Sciences Center G wing. The automated system is available 24/7 for users with key access.

To receive access to the liquid nitrogen system, follow these steps:

1. Log in to Workday.
2. Create a chemical requisition.
3. Click Search Catalog.
4. Type LN2 Access Card in the search field.
5. Add the card to your cart and complete the checkout process.

LN2 access cards are not transferable and are renewed annually.  

You must complete the EHS Liquid Nitrogen Fill Station Safety Course annually and submit an application for the access card. Once your access is approved in Workday and you have completed the mandatory training, you will receive your LN2 access card.

Cage access

Many buildings have cylinder cages and rooms, which allow Gas Services to have a central delivery point for that building. Only authorized, certified Gas Services customers are allowed to access these locations. You must have a key to access these rooms or cages:

You must complete the critical action form to obtain a key. Enter your direct supervisor’s name and the location and room information above to complete the form.

Please contact the ASU Lock Shop at 480-965-1829 if you have any questions regarding the completion of this form.   

Dry ice is available 24/7, with crucial access requirements, at the Bateman Physical Sciences Center, G wing, room G101. Access must be requested through Gas Services. A scale is located near the dry ice coolers to accurately record the amount dispensed, as noted in the log located nearby. Record the following information:

• Date
• Principal investigator and department
• Cost center
• Program, grant, gift or project number
• Weight of the dry ice being dispensed
• Your name

Warning: Dry ice is stored at -109 degrees Fahrenheit. Do not handle dry ice with bare hands, as this can cause serious injury. Personal protective equipment is available at the dispensing station.

Gas cylinder training

ASU Environmental Health and Safety provides gas cylinder training. You must complete these tasks to become gas cylinder certified:

• Complete the Compressed Gas Safety Training course.
• Work with a mentor.
  • A mentor is an ASU employee who has completed the ASU Compressed Gas Safety Training, has a technical understanding of essential compressed gas installation components, and is proficient at connecting, disconnecting and transporting common compressed gas storage vessels, including dewars.

You must submit the mentor verification checklist and proof of the training completion to EHS. Email EHS or call 480-965-1823 for more information.