ES&H Manual



6150 Appendix T3

Gas Cylinder Labeling



1.0            Purpose


Gas cylinders, tanks, and dewars (cylinders) used at Jefferson Lab are labeled to ensure safety. This appendix describes Jefferson Lab’s minimum requirement for the labeling of cylinders. 


2.0            Scope


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


The process steps for these procedures are performed in coordination with ES&H Manual Chapter 6150 Gas Cylinder Safety – Storage, Movement, and Labeling.


3.0            Responsibilities

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


3.1              Anyone at Jefferson Lab

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


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

·         Ensure gas cylinders are properly labeled.


4.0            Process Steps


4.1              Cylinder Labeling


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


4.1.1        Shoulder Label


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


Example 1  Gas Cylinder Shoulder Label


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


4.1.2        Tear-off Tag


All gas cylinders are required to have a “Tear-off Tag” denoting content level.


Figure 1  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).


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


4.1.3        Label(s) - Missing or Illegible


Step 1         Do not use the gas cylinder.


Step 2         Mark the gas cylinder “Contents Unknown.”


Step 3         Remove the gas cylinder from service. 


Step 4         Move it to the empty cylinder storage rack.


Step 5         Call the Industrial Hygiene to report the problem.


5.0            Revision Summary


Revision 1.1 – 08/03/15 – Periodic Review; clarified that the contents of gas cylinders are considered chemicals or hazardous material thus covered under a variety of other ES&H Manual Chapters.

Revision 1.0 – 06/15/11 – 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 8/4/2015.