institut für ::::::::::: chemie der universität göttingen
institut für ::::::::::: chemie der universität göttingen
institut für ::::::::::: chemie der universität göttingen
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INSTITUTE OF PHYSICAL CHEMISTRY<br />
AT GÖTTINGEN UNIVERSITY<br />
Guidelines for Handling Compressed Gas Cylin<strong>der</strong>s<br />
1. Storing compressed gas cylin<strong>der</strong>s of any size in laboratories is prohibited! Any<br />
compressed gas cylin<strong>der</strong> not connected to any equipment is consi<strong>der</strong>ed as<br />
stored.<br />
2. Compressed gas cylin<strong>der</strong>s must be secured against falling over and protected<br />
from heat. A wooden base should be used to protect the floor covering.<br />
3. Compressed gas cylin<strong>der</strong>s containing highly toxic or toxic gases must be<br />
permanently vented when set up in a laboratory (by means of gas safety<br />
cabinets, fume hoods or separate venting).<br />
4. No tools must be used for opening or closing compressed gas cylin<strong>der</strong> valves.<br />
Cylin<strong>der</strong>s whose valves cannot be opened or closed by hand must be taken out<br />
of operation immediately, and the safety representatives must be informed at<br />
once.<br />
5. The type of gas, the volume and the TÜV inspection date of a compressed gas<br />
cylin<strong>der</strong> is printed on the bottle neck or can be found on a label. Compressed gas<br />
cylin<strong>der</strong>s must be returned not later than one month before the next inspection is<br />
due. The type of gas is indicated by the colour of the paint. Also, the identification<br />
in accordance with the Ordinance on Hazardous Substances<br />
(‘Gefahrstoffverordnung’) can be found on the cylin<strong>der</strong>.<br />
6. The valves, pressure gauges, gaskets and similar parts of cylin<strong>der</strong>s containing<br />
oxygen or highly oxidant gases must not in any case come into contact with<br />
grease, oil or glycerin. Spontaneous combustion due to oxidation can lead to fire<br />
and explosion.<br />
7. All tubes used must withstand the pressure and other mechanical, thermal and<br />
chemical conditions that are to be expected. Tubes must be firmly fixed and<br />
secured with appropriate clamps. All connections must be inspected for tightness<br />
before commencing work.<br />
8. When no gas is required for a longer period, the cylin<strong>der</strong> valve should be closed<br />
and pressure taken off the pressure regulator.<br />
9. Before transporting compressed gas cylin<strong>der</strong>s the cylin<strong>der</strong> valves must be closed<br />
and the valve protection caps screwed on. For empty compressed gas cylin<strong>der</strong>s<br />
(residual pressure of 10 bar required), locknuts should be screwed on in<br />
combination with appropriate gaskets.<br />
Attention: left-handed screw threads on cylin<strong>der</strong>s containing flammable<br />
gases!<br />
10. Transport of cylin<strong>der</strong>s must be carried out by means of appropriate devices such<br />
as cylin<strong>der</strong> trolleys.
11. As a daily rental charge must be paid for compressed gas cylin<strong>der</strong>s, they should<br />
be returned as soon as they are empty (residual pressure of 10 bar required), or<br />
if they are not used for a longer period of time, and not later than the date<br />
specified on the attached label.<br />
12. For further, detailed specifications and regulations regarding the use of<br />
compressed gas cylin<strong>der</strong>s and gases, please consult the<br />
Unfallverhütungsvorschrift Gase (GUV 9.9), the TRG 280, the Richtlinien für<br />
Laboratorien (GUV 16.17, Kapitel 5.4.3) and the safety data sheets. These<br />
documents are included in your work group safety fol<strong>der</strong>, or you can request<br />
them from the safety representative.<br />
Valid as of: 10/2001<br />
gez. Prof. Dr. M. Suhm<br />
(managing director)