ES&H Manual



6150 Appendix T3

Gas[1] Cylinder Labeling



Jefferson Lab has determined that working with gas(es) carries an unmitigated Risk Code >2.  At a minimum all tasks requiring gas are discussed with the supervisor prior to commencement of work.  An Operational Safety Procedure (OSP) is written for work considered to be Risk Code >2 in accordance with ES&H Manual Chapter 3210 Work Planning, Control, and Authorization Process.


1.0          Purpose


Gas cylinders, tanks, and dewars (collectively referred to as “cylinders”) used at Jefferson Lab are labeled in accordance with federal, state, and local requirements and industry standards as defined in ES&H Manual Chapter 2410 Appendix T1 Hazard Issues List.  This appendix describes Jefferson Lab’s minimum requirement for the labeling of cylinders. 


2.0          Scope


This appendix addresses labeling requirements for gas cylinders, tanks, and dewars.  Requirements for piping system labeling is defined in ES&H Manual 6610 Appendix T3 Chemical Labeling, Storing, and Transporting Requirements.


3.0          Responsibilities

NOTE:           Management authority may be delegated at the discretion of the responsible manager.


3.1            Qualified Gas Worker

·       Ensure cylinder labels are legible.  (Contact Industrial Hygiene for assistance or for new labels as required.)


3.2            Supervisor/Subcontracting Officer’s Technical Representative (SOTR)/Sponsor

·       Ensure that cylinders are properly labeled.


4.0          Cylinder Labeling


NOTE:  Cylinder color may vary and is not a reliable means of content identification. 


4.1            Shoulder Label

            All cylinders are required to have a Shoulder Label describing its contents.


Step 1:          Check gas cylinder label prior to use.  Do not us if the label is illegible.


Example 1  Gas Cylinder Shoulder Label



4.2            Tear-off Tag


Step 1       Attach a tear-off tag (see Figure 1) to the gas cylinder in a conspicuous place (tear off tags are available through the Stockroom).


Figure 1  Tear-off Tag


Step 2       During use, tear the tag to indicate whether the cylinder is full, partially full (in use), or empty.


4.3            Label(s) - Missing or Illegible


Step 1       Do not use the gas.


Step 2       Mark the gas cylinder “Contents Unknown.”


Step 3       Remove the gas cylinder from service. 


Step 4       Put (or leave it) in the cylinder storage rack.


Step 5       Call the Industrial Hygiene to report the problem.



5.0          Revision Summary


Revision 1 – 06/15/2011 – Updated to reflect current laboratory operations.












ESH&Q Division

Tim Minga





This document is controlled as an on line file.  It may be printed but the print copy is not a controlled document.  It is the user’s responsibility to ensure that the document is the same revision as the current on line file.  This copy was printed on 7/2/2012.

[1] For the purpose of this chapter the term “gas” is used, in its singular or plural form, to mean compressed, liquefied, and/or solidified gas.