4.5.24 When a high pressure gas (non-liquefied) cylinder is in
ANSI Z49.1, 10.8.4.7
use, the valve shall be fully opened to prevent leakage
around the valve stem.
4.5.25 Cylinders not having a fixed hand wheel shall have
ANSI Z49.1, 10.8.4.6;
keys, handles or non-adjustable wrenches on valve
stems while cylinders are in service.
CGA G-1, 18.104.22.168;
CGA P-1, 22.214.171.124;
126.96.36.199 Manifolded or coupled cylinders shall have at
least one such wrench always available.
4.5.26 Cylinders having hand wheels shall not be opened
ANSI Z49.1, 10.8.4.5;
using wrenches, hammers or other tools. If the valve
cannot be opened by hand, then the manufacturer shall
CGA P-1, 188.8.131.52 ;
be notified and their directions followed.
CGA G-1, 184.108.40.206;
4.5.27 When cylinders are secured in a suitable hand truck,
ANSI Z-49.1, 10.8.3.10;
regulators do not have to be removed and valve
protection caps need not be in place before cylinders
CGA G-1, 5.2.5;
are moved. When cylinders are to be moved with
regulators attached, the cylinder valve must be closed.
4.5.28 Cylinder valves shall be closed before moving
ANSI Z-49.1, 10.8.3.5;
CGA P-1, 3.8.1;
4.5.29 Valve protection caps shall not be used for lifting
ANSI Z-49.1, 10.8.3.7;
CGA P-1, 3.5.1;
4.5.30 When using a crane, derrick, etc. to transport cylinders,
ANSI Z-49.1, 10.8.3.8;
a cradle, boat, pallet, slingboard or other suitable
platform shall be used. Compressed gas cylinders shall
CGA G-1, 5.2.3;
be secured to the lifting device before they are hoisted.