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COMPRESSED GAS
Introduction
Compressed gases are used throughout ASU for academic, research, and maintenance/operations purposes (to include construction, renovations, and special events). Pure gases and gas mixtures are used in classrooms, processing applications and research areas as reactants, carriers and in laser systems. Welding and refrigeration charging are typical industrial applications involving compressed gases. These gases have risks associated with their use, primarily in the chemical properties of the gas (e.g. toxicity, flammability) and second the physical hazards usually associated with compressed gases and high pressure containers (e.g. cryogenic, high pressure, rupture).
Applicable ASU Policy
- EHS 205 – Storage of Hazardous Materials
Applicable ASU Guideline
- EHS Compressed Gas Cylinders Compliance Guidelines
Applicable Regulations
- Compressed Gas Association (CGA) Pamphlets P-1(4/00 Ed.) Safe Handling of Compressed Gases in Containers, additional gas & operations specific pamphlets may apply (Refer to CGA)
- International Fire Code Chapter 30 (2003 edition)
- International Building Code Chapters 3, 4, & 9 (2003 edition)
- Uniform Fire Code Articles 74 and 80 (1997 edition)
- Uniform Building Code Chapter 4 – Section 411 (1997 edition)
- 29 CFR 1910 Subpart H - Hazardous Materials
- 29 CFR1910 Subpart M - Compressed Gas & Compressed Air Equipment
- 29 CFR 1926 – Safety and Health Regulations for Construction
- 49 CFR 171-179/14 CFR 103 - Hazardous Materials Regulations of the Department of Transportation
Summary of Requirements
- Cylinders must be handled as a high pressure source. Always transport cylinders with the safety cap securely installed and use a cylinder cart with straps to secure cylinder. Do not roll them by hand along the floor.
- Always store cylinders upright and secure them individually using an approved lock-down device, strap or chain (securing point must be at approximately 2/3rds the cylinder height). Do not secure with rope, nylon ties or wire.
- Always use the correct pressure regulator for the specific gas. Special caution must be used with “Oxygen” cylinders to verify they are grease and oil free around fittings and connections.
- Do not store cylinders or lecture bottles with the regulator in place. If the regulator fails, the entire contents of the cylinder may be discharged.
- CGA fittings differ for inert gases (e.g., He, Ar, N 2 ), flammable gases (e.g., H 2 ) and oxidizers (e.g., O 2 , N 2 0). Never adapt incompatible fittings or regulators to other types of gases.
- Compressed gas cylinders which contain toxic gases must be stored in a designated area, well ventilated, preferably monitored with environmental abatement technology.
- All compressed gas cylinders must be clearly marked with the correct chemical name and formula. The compressed gas cylinders must be stored away from direct sunlight or heat.
- All cylinders must be labeled to indicate if the container is "Full" or "Empty". Never refill a cylinder with any other type of gas.
- All cylinders must be compliant with required frequency of hydrostatic test date.
- Use and storage must be below the facility's accumulated maximum allowable physical and health hazard quantities per fire code.
Training
Individuals using compressed gases must be trained for safe use of the hazardous material and pressurized systems. Employees must complete Hazard Communication or Chemical Hygiene training and be familiar with CGA Pamphlet P-1“on the “Safe Handling of Compressed Gases in Containers”. This training can be obtained through ASU EH&S. Primary responsibility for specific operations training is with the specific department and employee's supervision. Consult with EH&S as necessary.
Reporting
Laboratories & Research Facilities - Compressed gases must be included in the Chemical Hygiene Plan's Chemical Inventory, by Law and Fire Code. Additional Work Locations - The Chemical Information List must include and maintain current information for all compressed gases, if they are used or stored in any workplace. Additions or deletions must be made through EH&S.
Inspections
Visual and compliance inspections must be conducted as prescribed in applicable regulations to determine that compressed gas cylinders are being maintained in a safe condition.
Updated 11/21/06
Mailing Address: PO Box 873804, Tempe, Arizona 85287-3804
Contact Email: EHS@asu.edu
Phone: (480) 965-1823
FAX: (480) 965-0736
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